java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf -i ../../../trunk/examples/svcomp/memsafety/test-0235_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 23:27:46,820 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 23:27:46,822 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 23:27:46,837 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 23:27:46,837 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 23:27:46,838 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 23:27:46,839 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 23:27:46,841 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 23:27:46,843 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 23:27:46,844 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 23:27:46,845 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 23:27:46,845 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 23:27:46,846 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 23:27:46,848 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 23:27:46,849 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 23:27:46,851 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 23:27:46,853 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 23:27:46,855 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 23:27:46,857 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 23:27:46,858 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 23:27:46,861 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 23:27:46,861 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 23:27:46,861 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 23:27:46,862 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 23:27:46,863 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 23:27:46,865 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 23:27:46,865 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 23:27:46,866 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 23:27:46,866 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 23:27:46,866 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 23:27:46,867 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 23:27:46,867 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf [2018-01-24 23:27:46,876 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 23:27:46,877 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 23:27:46,877 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 23:27:46,877 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 23:27:46,878 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 23:27:46,878 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 23:27:46,878 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 23:27:46,878 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 23:27:46,878 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 23:27:46,878 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 23:27:46,879 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 23:27:46,879 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 23:27:46,879 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 23:27:46,879 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 23:27:46,879 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 23:27:46,879 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 23:27:46,879 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 23:27:46,879 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 23:27:46,880 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 23:27:46,880 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 23:27:46,880 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 23:27:46,880 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 23:27:46,880 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 23:27:46,880 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 23:27:46,880 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:27:46,881 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 23:27:46,881 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 23:27:46,881 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 23:27:46,881 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 23:27:46,881 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 23:27:46,881 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 23:27:46,882 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 23:27:46,882 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 23:27:46,882 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 23:27:46,882 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 23:27:46,883 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 23:27:46,915 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 23:27:46,925 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 23:27:46,929 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 23:27:46,930 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 23:27:46,930 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 23:27:46,931 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/test-0235_false-valid-deref.i [2018-01-24 23:27:47,101 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 23:27:47,107 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 23:27:47,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 23:27:47,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 23:27:47,113 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 23:27:47,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:27:47" (1/1) ... [2018-01-24 23:27:47,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b8bf943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:27:47, skipping insertion in model container [2018-01-24 23:27:47,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:27:47" (1/1) ... [2018-01-24 23:27:47,130 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:27:47,173 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:27:47,310 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:27:47,338 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:27:47,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:27:47 WrapperNode [2018-01-24 23:27:47,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 23:27:47,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 23:27:47,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 23:27:47,352 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 23:27:47,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:27:47" (1/1) ... [2018-01-24 23:27:47,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:27:47" (1/1) ... [2018-01-24 23:27:47,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:27:47" (1/1) ... [2018-01-24 23:27:47,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:27:47" (1/1) ... [2018-01-24 23:27:47,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:27:47" (1/1) ... [2018-01-24 23:27:47,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:27:47" (1/1) ... [2018-01-24 23:27:47,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:27:47" (1/1) ... [2018-01-24 23:27:47,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 23:27:47,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 23:27:47,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 23:27:47,405 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 23:27:47,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:27:47" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:27:47,455 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 23:27:47,455 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 23:27:47,455 INFO L136 BoogieDeclarations]: Found implementation of procedure calloc_model [2018-01-24 23:27:47,455 INFO L136 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2018-01-24 23:27:47,455 INFO L136 BoogieDeclarations]: Found implementation of procedure l4_insert [2018-01-24 23:27:47,456 INFO L136 BoogieDeclarations]: Found implementation of procedure l3_insert [2018-01-24 23:27:47,456 INFO L136 BoogieDeclarations]: Found implementation of procedure l2_insert [2018-01-24 23:27:47,456 INFO L136 BoogieDeclarations]: Found implementation of procedure l1_insert [2018-01-24 23:27:47,456 INFO L136 BoogieDeclarations]: Found implementation of procedure l0_insert [2018-01-24 23:27:47,456 INFO L136 BoogieDeclarations]: Found implementation of procedure l4_destroy [2018-01-24 23:27:47,456 INFO L136 BoogieDeclarations]: Found implementation of procedure l3_destroy [2018-01-24 23:27:47,457 INFO L136 BoogieDeclarations]: Found implementation of procedure l2_destroy [2018-01-24 23:27:47,457 INFO L136 BoogieDeclarations]: Found implementation of procedure l1_destroy [2018-01-24 23:27:47,457 INFO L136 BoogieDeclarations]: Found implementation of procedure l0_destroy [2018-01-24 23:27:47,457 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 23:27:47,457 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 23:27:47,457 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 23:27:47,458 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 23:27:47,458 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 23:27:47,458 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 23:27:47,458 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-01-24 23:27:47,458 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-01-24 23:27:47,458 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 23:27:47,459 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-24 23:27:47,459 INFO L128 BoogieDeclarations]: Found specification of procedure abort [2018-01-24 23:27:47,459 INFO L128 BoogieDeclarations]: Found specification of procedure memset [2018-01-24 23:27:47,459 INFO L128 BoogieDeclarations]: Found specification of procedure calloc_model [2018-01-24 23:27:47,459 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 23:27:47,459 INFO L128 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2018-01-24 23:27:47,460 INFO L128 BoogieDeclarations]: Found specification of procedure l4_insert [2018-01-24 23:27:47,460 INFO L128 BoogieDeclarations]: Found specification of procedure l3_insert [2018-01-24 23:27:47,460 INFO L128 BoogieDeclarations]: Found specification of procedure l2_insert [2018-01-24 23:27:47,460 INFO L128 BoogieDeclarations]: Found specification of procedure l1_insert [2018-01-24 23:27:47,460 INFO L128 BoogieDeclarations]: Found specification of procedure l0_insert [2018-01-24 23:27:47,460 INFO L128 BoogieDeclarations]: Found specification of procedure l4_destroy [2018-01-24 23:27:47,460 INFO L128 BoogieDeclarations]: Found specification of procedure l3_destroy [2018-01-24 23:27:47,461 INFO L128 BoogieDeclarations]: Found specification of procedure l2_destroy [2018-01-24 23:27:47,461 INFO L128 BoogieDeclarations]: Found specification of procedure l1_destroy [2018-01-24 23:27:47,461 INFO L128 BoogieDeclarations]: Found specification of procedure l0_destroy [2018-01-24 23:27:47,461 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 23:27:47,461 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 23:27:47,461 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 23:27:47,847 WARN L455 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-01-24 23:27:48,097 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 23:27:48,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:27:48 BoogieIcfgContainer [2018-01-24 23:27:48,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 23:27:48,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 23:27:48,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 23:27:48,101 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 23:27:48,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:27:47" (1/3) ... [2018-01-24 23:27:48,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d24041f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:27:48, skipping insertion in model container [2018-01-24 23:27:48,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:27:47" (2/3) ... [2018-01-24 23:27:48,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d24041f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:27:48, skipping insertion in model container [2018-01-24 23:27:48,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:27:48" (3/3) ... [2018-01-24 23:27:48,104 INFO L105 eAbstractionObserver]: Analyzing ICFG test-0235_false-valid-deref.i [2018-01-24 23:27:48,111 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 23:27:48,117 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 85 error locations. [2018-01-24 23:27:48,161 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 23:27:48,161 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 23:27:48,161 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 23:27:48,175 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 23:27:48,175 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 23:27:48,175 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 23:27:48,175 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 23:27:48,175 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 23:27:48,176 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 23:27:48,200 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states. [2018-01-24 23:27:48,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-01-24 23:27:48,204 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:27:48,205 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-01-24 23:27:48,205 INFO L371 AbstractCegarLoop]: === Iteration 1 === [l3_destroyErr0RequiresViolation, l3_destroyErr3RequiresViolation, l3_destroyErr1RequiresViolation, l3_destroyErr2RequiresViolation, l3_destroyErr4RequiresViolation, l3_destroyErr5RequiresViolation, l0_insertErr3RequiresViolation, l0_insertErr1RequiresViolation, l0_insertErr5RequiresViolation, l0_insertErr2RequiresViolation, l0_insertErr4RequiresViolation, l0_insertErr0RequiresViolation, l4_destroyErr4RequiresViolation, l4_destroyErr6RequiresViolation, l4_destroyErr2RequiresViolation, l4_destroyErr3RequiresViolation, l4_destroyErr1RequiresViolation, l4_destroyErr7RequiresViolation, l4_destroyErr0RequiresViolation, l4_destroyErr5RequiresViolation, l2_insertErr3RequiresViolation, l2_insertErr5RequiresViolation, l2_insertErr0RequiresViolation, l2_insertErr1RequiresViolation, l2_insertErr4RequiresViolation, l2_insertErr2RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, l3_insertErr4RequiresViolation, l3_insertErr0RequiresViolation, l3_insertErr5RequiresViolation, l3_insertErr3RequiresViolation, l3_insertErr1RequiresViolation, l3_insertErr2RequiresViolation, l1_insertErr4RequiresViolation, l1_insertErr0RequiresViolation, l1_insertErr2RequiresViolation, l1_insertErr3RequiresViolation, l1_insertErr1RequiresViolation, l1_insertErr5RequiresViolation, l0_destroyErr5RequiresViolation, l0_destroyErr3RequiresViolation, l0_destroyErr1RequiresViolation, l0_destroyErr0RequiresViolation, l0_destroyErr4RequiresViolation, l0_destroyErr2RequiresViolation, calloc_modelErr0RequiresViolation, calloc_modelErr1RequiresViolation, l4_insertErr5RequiresViolation, l4_insertErr3RequiresViolation, l4_insertErr4RequiresViolation, l4_insertErr6RequiresViolation, l4_insertErr2RequiresViolation, l4_insertErr0RequiresViolation, l4_insertErr1RequiresViolation, l4_insertErr7RequiresViolation, ULTIMATE.initErr1RequiresViolation, ULTIMATE.initErr0RequiresViolation, l1_destroyErr2RequiresViolation, l1_destroyErr4RequiresViolation, l1_destroyErr0RequiresViolation, l1_destroyErr1RequiresViolation, l1_destroyErr5RequiresViolation, l1_destroyErr3RequiresViolation, l2_destroyErr1RequiresViolation, l2_destroyErr0RequiresViolation, l2_destroyErr2RequiresViolation, l2_destroyErr4RequiresViolation, l2_destroyErr5RequiresViolation, l2_destroyErr3RequiresViolation]=== [2018-01-24 23:27:48,208 INFO L82 PathProgramCache]: Analyzing trace with hash 15319548, now seen corresponding path program 1 times [2018-01-24 23:27:48,210 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:27:48,250 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:27:48,250 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:27:48,250 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:27:48,250 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:27:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:27:48,291 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:27:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:27:48,335 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:27:48,421 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 23:27:48,422 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:27:48,425 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 23:27:48,441 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 23:27:48,441 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:27:48,444 INFO L87 Difference]: Start difference. First operand 275 states. Second operand 3 states. [2018-01-24 23:27:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:27:48,932 INFO L93 Difference]: Finished difference Result 661 states and 809 transitions. [2018-01-24 23:27:48,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 23:27:48,934 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-01-24 23:27:48,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:27:48,951 INFO L225 Difference]: With dead ends: 661 [2018-01-24 23:27:48,951 INFO L226 Difference]: Without dead ends: 391 [2018-01-24 23:27:48,958 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:27:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2018-01-24 23:27:49,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 345. [2018-01-24 23:27:49,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2018-01-24 23:27:49,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 426 transitions. [2018-01-24 23:27:49,022 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 426 transitions. Word has length 4 [2018-01-24 23:27:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:27:49,022 INFO L432 AbstractCegarLoop]: Abstraction has 345 states and 426 transitions. [2018-01-24 23:27:49,022 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 23:27:49,022 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 426 transitions. [2018-01-24 23:27:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-01-24 23:27:49,023 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:27:49,023 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-01-24 23:27:49,023 INFO L371 AbstractCegarLoop]: === Iteration 2 === [l3_destroyErr0RequiresViolation, l3_destroyErr3RequiresViolation, l3_destroyErr1RequiresViolation, l3_destroyErr2RequiresViolation, l3_destroyErr4RequiresViolation, l3_destroyErr5RequiresViolation, l0_insertErr3RequiresViolation, l0_insertErr1RequiresViolation, l0_insertErr5RequiresViolation, l0_insertErr2RequiresViolation, l0_insertErr4RequiresViolation, l0_insertErr0RequiresViolation, l4_destroyErr4RequiresViolation, l4_destroyErr6RequiresViolation, l4_destroyErr2RequiresViolation, l4_destroyErr3RequiresViolation, l4_destroyErr1RequiresViolation, l4_destroyErr7RequiresViolation, l4_destroyErr0RequiresViolation, l4_destroyErr5RequiresViolation, l2_insertErr3RequiresViolation, l2_insertErr5RequiresViolation, l2_insertErr0RequiresViolation, l2_insertErr1RequiresViolation, l2_insertErr4RequiresViolation, l2_insertErr2RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, l3_insertErr4RequiresViolation, l3_insertErr0RequiresViolation, l3_insertErr5RequiresViolation, l3_insertErr3RequiresViolation, l3_insertErr1RequiresViolation, l3_insertErr2RequiresViolation, l1_insertErr4RequiresViolation, l1_insertErr0RequiresViolation, l1_insertErr2RequiresViolation, l1_insertErr3RequiresViolation, l1_insertErr1RequiresViolation, l1_insertErr5RequiresViolation, l0_destroyErr5RequiresViolation, l0_destroyErr3RequiresViolation, l0_destroyErr1RequiresViolation, l0_destroyErr0RequiresViolation, l0_destroyErr4RequiresViolation, l0_destroyErr2RequiresViolation, calloc_modelErr0RequiresViolation, calloc_modelErr1RequiresViolation, l4_insertErr5RequiresViolation, l4_insertErr3RequiresViolation, l4_insertErr4RequiresViolation, l4_insertErr6RequiresViolation, l4_insertErr2RequiresViolation, l4_insertErr0RequiresViolation, l4_insertErr1RequiresViolation, l4_insertErr7RequiresViolation, ULTIMATE.initErr1RequiresViolation, ULTIMATE.initErr0RequiresViolation, l1_destroyErr2RequiresViolation, l1_destroyErr4RequiresViolation, l1_destroyErr0RequiresViolation, l1_destroyErr1RequiresViolation, l1_destroyErr5RequiresViolation, l1_destroyErr3RequiresViolation, l2_destroyErr1RequiresViolation, l2_destroyErr0RequiresViolation, l2_destroyErr2RequiresViolation, l2_destroyErr4RequiresViolation, l2_destroyErr5RequiresViolation, l2_destroyErr3RequiresViolation]=== [2018-01-24 23:27:49,023 INFO L82 PathProgramCache]: Analyzing trace with hash 15319549, now seen corresponding path program 1 times [2018-01-24 23:27:49,023 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:27:49,024 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:27:49,024 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:27:49,024 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:27:49,024 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:27:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:27:49,039 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:27:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:27:49,092 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:27:49,092 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 23:27:49,092 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:27:49,094 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 23:27:49,094 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 23:27:49,094 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:27:49,095 INFO L87 Difference]: Start difference. First operand 345 states and 426 transitions. Second operand 3 states. [2018-01-24 23:27:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:27:49,223 INFO L93 Difference]: Finished difference Result 353 states and 437 transitions. [2018-01-24 23:27:49,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 23:27:49,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-01-24 23:27:49,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:27:49,226 INFO L225 Difference]: With dead ends: 353 [2018-01-24 23:27:49,227 INFO L226 Difference]: Without dead ends: 352 [2018-01-24 23:27:49,228 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:27:49,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2018-01-24 23:27:49,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 344. [2018-01-24 23:27:49,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2018-01-24 23:27:49,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 425 transitions. [2018-01-24 23:27:49,257 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 425 transitions. Word has length 4 [2018-01-24 23:27:49,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:27:49,257 INFO L432 AbstractCegarLoop]: Abstraction has 344 states and 425 transitions. [2018-01-24 23:27:49,257 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 23:27:49,258 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 425 transitions. [2018-01-24 23:27:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 23:27:49,258 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:27:49,258 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:27:49,258 INFO L371 AbstractCegarLoop]: === Iteration 3 === [l3_destroyErr0RequiresViolation, l3_destroyErr3RequiresViolation, l3_destroyErr1RequiresViolation, l3_destroyErr2RequiresViolation, l3_destroyErr4RequiresViolation, l3_destroyErr5RequiresViolation, l0_insertErr3RequiresViolation, l0_insertErr1RequiresViolation, l0_insertErr5RequiresViolation, l0_insertErr2RequiresViolation, l0_insertErr4RequiresViolation, l0_insertErr0RequiresViolation, l4_destroyErr4RequiresViolation, l4_destroyErr6RequiresViolation, l4_destroyErr2RequiresViolation, l4_destroyErr3RequiresViolation, l4_destroyErr1RequiresViolation, l4_destroyErr7RequiresViolation, l4_destroyErr0RequiresViolation, l4_destroyErr5RequiresViolation, l2_insertErr3RequiresViolation, l2_insertErr5RequiresViolation, l2_insertErr0RequiresViolation, l2_insertErr1RequiresViolation, l2_insertErr4RequiresViolation, l2_insertErr2RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, l3_insertErr4RequiresViolation, l3_insertErr0RequiresViolation, l3_insertErr5RequiresViolation, l3_insertErr3RequiresViolation, l3_insertErr1RequiresViolation, l3_insertErr2RequiresViolation, l1_insertErr4RequiresViolation, l1_insertErr0RequiresViolation, l1_insertErr2RequiresViolation, l1_insertErr3RequiresViolation, l1_insertErr1RequiresViolation, l1_insertErr5RequiresViolation, l0_destroyErr5RequiresViolation, l0_destroyErr3RequiresViolation, l0_destroyErr1RequiresViolation, l0_destroyErr0RequiresViolation, l0_destroyErr4RequiresViolation, l0_destroyErr2RequiresViolation, calloc_modelErr0RequiresViolation, calloc_modelErr1RequiresViolation, l4_insertErr5RequiresViolation, l4_insertErr3RequiresViolation, l4_insertErr4RequiresViolation, l4_insertErr6RequiresViolation, l4_insertErr2RequiresViolation, l4_insertErr0RequiresViolation, l4_insertErr1RequiresViolation, l4_insertErr7RequiresViolation, ULTIMATE.initErr1RequiresViolation, ULTIMATE.initErr0RequiresViolation, l1_destroyErr2RequiresViolation, l1_destroyErr4RequiresViolation, l1_destroyErr0RequiresViolation, l1_destroyErr1RequiresViolation, l1_destroyErr5RequiresViolation, l1_destroyErr3RequiresViolation, l2_destroyErr1RequiresViolation, l2_destroyErr0RequiresViolation, l2_destroyErr2RequiresViolation, l2_destroyErr4RequiresViolation, l2_destroyErr5RequiresViolation, l2_destroyErr3RequiresViolation]=== [2018-01-24 23:27:49,259 INFO L82 PathProgramCache]: Analyzing trace with hash 116258063, now seen corresponding path program 1 times [2018-01-24 23:27:49,259 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:27:49,260 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:27:49,260 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:27:49,260 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:27:49,260 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:27:49,282 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-24 23:27:49,283 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-24 23:27:49,283 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-24 23:27:49,289 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:27:49,289 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-24 23:27:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:27:49,325 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-01-24 23:27:49,326 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-24 23:27:49,326 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:27:49,326 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 23:27:49,331 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:27:49,331 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 23:27:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:27:49,366 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 23:27:49,400 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-01-24 23:27:49,401 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 23:27:49,403 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 23:27:49,403 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-01-24 23:27:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:27:49,410 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 23:27:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:27:49,437 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:27:49,437 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2018-01-24 23:27:49,437 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:27:49,438 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:27:49,438 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:27:49,438 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:27:49,438 INFO L87 Difference]: Start difference. First operand 344 states and 425 transitions. Second operand 4 states. [2018-01-24 23:27:49,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:27:49,663 INFO L93 Difference]: Finished difference Result 344 states and 425 transitions. [2018-01-24 23:27:49,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:27:49,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-01-24 23:27:49,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:27:49,666 INFO L225 Difference]: With dead ends: 344 [2018-01-24 23:27:49,666 INFO L226 Difference]: Without dead ends: 343 [2018-01-24 23:27:49,667 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:27:49,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-01-24 23:27:49,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-01-24 23:27:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-01-24 23:27:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 424 transitions. [2018-01-24 23:27:49,690 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 424 transitions. Word has length 17 [2018-01-24 23:27:49,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:27:49,691 INFO L432 AbstractCegarLoop]: Abstraction has 343 states and 424 transitions. [2018-01-24 23:27:49,691 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:27:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 424 transitions. [2018-01-24 23:27:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 23:27:49,691 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:27:49,691 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:27:49,692 INFO L371 AbstractCegarLoop]: === Iteration 4 === [l3_destroyErr0RequiresViolation, l3_destroyErr3RequiresViolation, l3_destroyErr1RequiresViolation, l3_destroyErr2RequiresViolation, l3_destroyErr4RequiresViolation, l3_destroyErr5RequiresViolation, l0_insertErr3RequiresViolation, l0_insertErr1RequiresViolation, l0_insertErr5RequiresViolation, l0_insertErr2RequiresViolation, l0_insertErr4RequiresViolation, l0_insertErr0RequiresViolation, l4_destroyErr4RequiresViolation, l4_destroyErr6RequiresViolation, l4_destroyErr2RequiresViolation, l4_destroyErr3RequiresViolation, l4_destroyErr1RequiresViolation, l4_destroyErr7RequiresViolation, l4_destroyErr0RequiresViolation, l4_destroyErr5RequiresViolation, l2_insertErr3RequiresViolation, l2_insertErr5RequiresViolation, l2_insertErr0RequiresViolation, l2_insertErr1RequiresViolation, l2_insertErr4RequiresViolation, l2_insertErr2RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, l3_insertErr4RequiresViolation, l3_insertErr0RequiresViolation, l3_insertErr5RequiresViolation, l3_insertErr3RequiresViolation, l3_insertErr1RequiresViolation, l3_insertErr2RequiresViolation, l1_insertErr4RequiresViolation, l1_insertErr0RequiresViolation, l1_insertErr2RequiresViolation, l1_insertErr3RequiresViolation, l1_insertErr1RequiresViolation, l1_insertErr5RequiresViolation, l0_destroyErr5RequiresViolation, l0_destroyErr3RequiresViolation, l0_destroyErr1RequiresViolation, l0_destroyErr0RequiresViolation, l0_destroyErr4RequiresViolation, l0_destroyErr2RequiresViolation, calloc_modelErr0RequiresViolation, calloc_modelErr1RequiresViolation, l4_insertErr5RequiresViolation, l4_insertErr3RequiresViolation, l4_insertErr4RequiresViolation, l4_insertErr6RequiresViolation, l4_insertErr2RequiresViolation, l4_insertErr0RequiresViolation, l4_insertErr1RequiresViolation, l4_insertErr7RequiresViolation, ULTIMATE.initErr1RequiresViolation, ULTIMATE.initErr0RequiresViolation, l1_destroyErr2RequiresViolation, l1_destroyErr4RequiresViolation, l1_destroyErr0RequiresViolation, l1_destroyErr1RequiresViolation, l1_destroyErr5RequiresViolation, l1_destroyErr3RequiresViolation, l2_destroyErr1RequiresViolation, l2_destroyErr0RequiresViolation, l2_destroyErr2RequiresViolation, l2_destroyErr4RequiresViolation, l2_destroyErr5RequiresViolation, l2_destroyErr3RequiresViolation]=== [2018-01-24 23:27:49,692 INFO L82 PathProgramCache]: Analyzing trace with hash 116258064, now seen corresponding path program 1 times [2018-01-24 23:27:49,692 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:27:49,693 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:27:49,693 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:27:49,693 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:27:49,693 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:27:49,707 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-24 23:27:49,707 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-24 23:27:49,707 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-24 23:27:49,716 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:27:49,716 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-24 23:27:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:27:49,748 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-01-24 23:27:49,749 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-24 23:27:49,749 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:27:49,749 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-24 23:27:49,755 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:27:49,756 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 23:27:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:27:49,778 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 23:27:49,788 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2018-01-24 23:27:49,789 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-24 23:27:49,805 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2018-01-24 23:27:49,805 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 23:27:49,820 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-01-24 23:27:49,820 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:44 [2018-01-24 23:27:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:27:49,852 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 23:27:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:27:49,952 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:27:49,952 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2018-01-24 23:27:49,952 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:27:49,953 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:27:49,953 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:27:49,953 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:27:49,953 INFO L87 Difference]: Start difference. First operand 343 states and 424 transitions. Second operand 4 states. [2018-01-24 23:27:50,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:27:50,202 INFO L93 Difference]: Finished difference Result 343 states and 424 transitions. [2018-01-24 23:27:50,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:27:50,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-01-24 23:27:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:27:50,204 INFO L225 Difference]: With dead ends: 343 [2018-01-24 23:27:50,205 INFO L226 Difference]: Without dead ends: 342 [2018-01-24 23:27:50,205 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:27:50,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2018-01-24 23:27:50,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2018-01-24 23:27:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2018-01-24 23:27:50,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 423 transitions. [2018-01-24 23:27:50,223 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 423 transitions. Word has length 17 [2018-01-24 23:27:50,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:27:50,223 INFO L432 AbstractCegarLoop]: Abstraction has 342 states and 423 transitions. [2018-01-24 23:27:50,223 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:27:50,223 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 423 transitions. [2018-01-24 23:27:50,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-01-24 23:27:50,228 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:27:50,228 INFO L322 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1] [2018-01-24 23:27:50,228 INFO L371 AbstractCegarLoop]: === Iteration 5 === [l3_destroyErr0RequiresViolation, l3_destroyErr3RequiresViolation, l3_destroyErr1RequiresViolation, l3_destroyErr2RequiresViolation, l3_destroyErr4RequiresViolation, l3_destroyErr5RequiresViolation, l0_insertErr3RequiresViolation, l0_insertErr1RequiresViolation, l0_insertErr5RequiresViolation, l0_insertErr2RequiresViolation, l0_insertErr4RequiresViolation, l0_insertErr0RequiresViolation, l4_destroyErr4RequiresViolation, l4_destroyErr6RequiresViolation, l4_destroyErr2RequiresViolation, l4_destroyErr3RequiresViolation, l4_destroyErr1RequiresViolation, l4_destroyErr7RequiresViolation, l4_destroyErr0RequiresViolation, l4_destroyErr5RequiresViolation, l2_insertErr3RequiresViolation, l2_insertErr5RequiresViolation, l2_insertErr0RequiresViolation, l2_insertErr1RequiresViolation, l2_insertErr4RequiresViolation, l2_insertErr2RequiresViolation, mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr16EnsuresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, l3_insertErr4RequiresViolation, l3_insertErr0RequiresViolation, l3_insertErr5RequiresViolation, l3_insertErr3RequiresViolation, l3_insertErr1RequiresViolation, l3_insertErr2RequiresViolation, l1_insertErr4RequiresViolation, l1_insertErr0RequiresViolation, l1_insertErr2RequiresViolation, l1_insertErr3RequiresViolation, l1_insertErr1RequiresViolation, l1_insertErr5RequiresViolation, l0_destroyErr5RequiresViolation, l0_destroyErr3RequiresViolation, l0_destroyErr1RequiresViolation, l0_destroyErr0RequiresViolation, l0_destroyErr4RequiresViolation, l0_destroyErr2RequiresViolation, calloc_modelErr0RequiresViolation, calloc_modelErr1RequiresViolation, l4_insertErr5RequiresViolation, l4_insertErr3RequiresViolation, l4_insertErr4RequiresViolation, l4_insertErr6RequiresViolation, l4_insertErr2RequiresViolation, l4_insertErr0RequiresViolation, l4_insertErr1RequiresViolation, l4_insertErr7RequiresViolation, ULTIMATE.initErr1RequiresViolation, ULTIMATE.initErr0RequiresViolation, l1_destroyErr2RequiresViolation, l1_destroyErr4RequiresViolation, l1_destroyErr0RequiresViolation, l1_destroyErr1RequiresViolation, l1_destroyErr5RequiresViolation, l1_destroyErr3RequiresViolation, l2_destroyErr1RequiresViolation, l2_destroyErr0RequiresViolation, l2_destroyErr2RequiresViolation, l2_destroyErr4RequiresViolation, l2_destroyErr5RequiresViolation, l2_destroyErr3RequiresViolation]=== [2018-01-24 23:27:50,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2125517946, now seen corresponding path program 1 times [2018-01-24 23:27:50,229 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:27:50,229 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:27:50,230 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:27:50,230 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:27:50,230 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:27:50,254 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-24 23:27:50,254 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-24 23:27:50,254 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-24 23:27:50,265 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:27:50,265 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-24 23:27:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:27:50,318 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 143 with the following transitions: [2018-01-24 23:27:50,320 INFO L201 CegarAbsIntRunner]: [84], [177], [179], [183], [206], [207], [213], [214], [215], [217], [221], [244], [246], [250], [273], [275], [279], [302], [303], [304], [308], [309], [310], [312], [315], [329], [331], [334], [336], [337], [338], [339], [342], [428], [446], [447], [448], [450], [451], [452], [454], [455], [456], [458], [459], [460], [462], [463], [464], [465], [466], [467], [468], [469], [472], [473], [474] [2018-01-24 23:27:50,371 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:27:50,372 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