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/array-memsafety/openbsd_cstrcmp-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 23:17:45,779 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 23:17:45,781 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 23:17:45,794 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 23:17:45,794 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 23:17:45,796 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 23:17:45,797 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 23:17:45,799 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 23:17:45,801 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 23:17:45,802 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 23:17:45,803 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 23:17:45,803 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 23:17:45,803 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 23:17:45,804 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 23:17:45,805 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 23:17:45,807 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 23:17:45,810 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 23:17:45,812 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 23:17:45,814 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 23:17:45,815 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 23:17:45,818 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 23:17:45,818 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 23:17:45,818 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 23:17:45,819 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 23:17:45,820 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 23:17:45,821 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 23:17:45,822 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 23:17:45,822 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 23:17:45,823 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 23:17:45,823 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 23:17:45,824 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 23:17:45,824 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 23:17:45,834 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 23:17:45,834 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 23:17:45,835 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 23:17:45,835 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 23:17:45,836 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 23:17:45,836 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 23:17:45,836 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 23:17:45,836 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 23:17:45,837 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 23:17:45,837 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 23:17:45,837 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 23:17:45,837 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 23:17:45,838 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 23:17:45,838 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 23:17:45,838 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 23:17:45,838 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 23:17:45,838 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 23:17:45,839 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 23:17:45,839 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 23:17:45,839 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 23:17:45,839 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 23:17:45,839 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 23:17:45,840 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 23:17:45,840 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 23:17:45,840 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:17:45,840 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 23:17:45,840 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 23:17:45,841 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 23:17:45,841 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 23:17:45,841 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 23:17:45,841 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 23:17:45,841 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 23:17:45,842 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 23:17:45,842 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 23:17:45,843 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 23:17:45,843 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 23:17:45,879 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 23:17:45,893 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 23:17:45,897 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 23:17:45,899 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 23:17:45,899 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 23:17:45,900 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrcmp-alloca_true-valid-memsafety_true-termination.i [2018-01-24 23:17:46,079 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 23:17:46,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 23:17:46,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 23:17:46,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 23:17:46,091 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 23:17:46,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:17:46" (1/1) ... [2018-01-24 23:17:46,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5054e5f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:46, skipping insertion in model container [2018-01-24 23:17:46,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:17:46" (1/1) ... [2018-01-24 23:17:46,108 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:17:46,144 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:17:46,255 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:17:46,270 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:17:46,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:46 WrapperNode [2018-01-24 23:17:46,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 23:17:46,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 23:17:46,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 23:17:46,278 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 23:17:46,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:46" (1/1) ... [2018-01-24 23:17:46,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:46" (1/1) ... [2018-01-24 23:17:46,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:46" (1/1) ... [2018-01-24 23:17:46,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:46" (1/1) ... [2018-01-24 23:17:46,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:46" (1/1) ... [2018-01-24 23:17:46,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:46" (1/1) ... [2018-01-24 23:17:46,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:46" (1/1) ... [2018-01-24 23:17:46,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 23:17:46,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 23:17:46,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 23:17:46,314 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 23:17:46,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:46" (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 23:17:46,366 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 23:17:46,367 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 23:17:46,367 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrcmp [2018-01-24 23:17:46,367 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 23:17:46,367 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 23:17:46,367 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 23:17:46,367 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 23:17:46,368 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 23:17:46,368 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 23:17:46,368 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 23:17:46,368 INFO L128 BoogieDeclarations]: Found specification of procedure cstrcmp [2018-01-24 23:17:46,368 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 23:17:46,368 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 23:17:46,368 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 23:17:46,572 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 23:17:46,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:17:46 BoogieIcfgContainer [2018-01-24 23:17:46,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 23:17:46,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 23:17:46,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 23:17:46,575 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 23:17:46,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:17:46" (1/3) ... [2018-01-24 23:17:46,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d574751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:17:46, skipping insertion in model container [2018-01-24 23:17:46,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:17:46" (2/3) ... [2018-01-24 23:17:46,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d574751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:17:46, skipping insertion in model container [2018-01-24 23:17:46,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:17:46" (3/3) ... [2018-01-24 23:17:46,578 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcmp-alloca_true-valid-memsafety_true-termination.i [2018-01-24 23:17:46,585 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 23:17:46,591 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 15 error locations. [2018-01-24 23:17:46,636 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 23:17:46,636 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 23:17:46,636 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 23:17:46,637 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 23:17:46,637 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 23:17:46,637 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 23:17:46,637 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 23:17:46,637 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 23:17:46,637 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 23:17:46,658 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2018-01-24 23:17:46,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 23:17:46,663 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:46,664 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:17:46,664 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrcmpErr0RequiresViolation, cstrcmpErr9RequiresViolation, cstrcmpErr4RequiresViolation, cstrcmpErr7RequiresViolation, cstrcmpErr5RequiresViolation, cstrcmpErr6RequiresViolation, cstrcmpErr1RequiresViolation, cstrcmpErr3RequiresViolation, cstrcmpErr2RequiresViolation, cstrcmpErr8RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:46,669 INFO L82 PathProgramCache]: Analyzing trace with hash 955833556, now seen corresponding path program 1 times [2018-01-24 23:17:46,672 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:46,712 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:46,712 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:46,712 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:46,712 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:46,768 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:46,907 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 23:17:46,909 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:46,910 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:17:46,910 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:46,912 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:17:46,922 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:17:46,923 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:17:46,925 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 4 states. [2018-01-24 23:17:47,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:47,158 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2018-01-24 23:17:47,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:17:47,160 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 23:17:47,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:47,170 INFO L225 Difference]: With dead ends: 73 [2018-01-24 23:17:47,170 INFO L226 Difference]: Without dead ends: 49 [2018-01-24 23:17:47,174 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 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 23:17:47,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-24 23:17:47,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-01-24 23:17:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-24 23:17:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2018-01-24 23:17:47,207 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 13 [2018-01-24 23:17:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:47,207 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2018-01-24 23:17:47,207 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:17:47,207 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2018-01-24 23:17:47,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 23:17:47,208 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:47,208 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:17:47,208 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cstrcmpErr0RequiresViolation, cstrcmpErr9RequiresViolation, cstrcmpErr4RequiresViolation, cstrcmpErr7RequiresViolation, cstrcmpErr5RequiresViolation, cstrcmpErr6RequiresViolation, cstrcmpErr1RequiresViolation, cstrcmpErr3RequiresViolation, cstrcmpErr2RequiresViolation, cstrcmpErr8RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:47,208 INFO L82 PathProgramCache]: Analyzing trace with hash 955833557, now seen corresponding path program 1 times [2018-01-24 23:17:47,208 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:47,210 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:47,210 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:47,210 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:47,210 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:47,230 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:47,370 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 23:17:47,370 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:47,370 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:17:47,370 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:47,372 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:17:47,373 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:17:47,373 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:17:47,373 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 6 states. [2018-01-24 23:17:47,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:47,471 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2018-01-24 23:17:47,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:17:47,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-01-24 23:17:47,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:47,473 INFO L225 Difference]: With dead ends: 49 [2018-01-24 23:17:47,473 INFO L226 Difference]: Without dead ends: 48 [2018-01-24 23:17:47,474 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:17:47,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-01-24 23:17:47,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-01-24 23:17:47,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-24 23:17:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2018-01-24 23:17:47,480 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 13 [2018-01-24 23:17:47,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:47,480 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2018-01-24 23:17:47,480 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:17:47,480 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2018-01-24 23:17:47,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 23:17:47,481 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:47,481 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:17:47,481 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cstrcmpErr0RequiresViolation, cstrcmpErr9RequiresViolation, cstrcmpErr4RequiresViolation, cstrcmpErr7RequiresViolation, cstrcmpErr5RequiresViolation, cstrcmpErr6RequiresViolation, cstrcmpErr1RequiresViolation, cstrcmpErr3RequiresViolation, cstrcmpErr2RequiresViolation, cstrcmpErr8RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:47,481 INFO L82 PathProgramCache]: Analyzing trace with hash -433930803, now seen corresponding path program 1 times [2018-01-24 23:17:47,481 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:47,482 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:47,482 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:47,483 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:47,483 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:47,501 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:47,582 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 23:17:47,582 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:47,582 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:17:47,583 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:47,583 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:17:47,583 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:17:47,583 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:17:47,584 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 5 states. [2018-01-24 23:17:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:47,678 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2018-01-24 23:17:47,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:17:47,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-01-24 23:17:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:47,679 INFO L225 Difference]: With dead ends: 48 [2018-01-24 23:17:47,680 INFO L226 Difference]: Without dead ends: 47 [2018-01-24 23:17:47,680 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:17:47,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-01-24 23:17:47,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-01-24 23:17:47,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-01-24 23:17:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2018-01-24 23:17:47,687 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 14 [2018-01-24 23:17:47,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:47,687 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2018-01-24 23:17:47,687 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:17:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2018-01-24 23:17:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-24 23:17:47,688 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:47,688 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:17:47,689 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cstrcmpErr0RequiresViolation, cstrcmpErr9RequiresViolation, cstrcmpErr4RequiresViolation, cstrcmpErr7RequiresViolation, cstrcmpErr5RequiresViolation, cstrcmpErr6RequiresViolation, cstrcmpErr1RequiresViolation, cstrcmpErr3RequiresViolation, cstrcmpErr2RequiresViolation, cstrcmpErr8RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:47,689 INFO L82 PathProgramCache]: Analyzing trace with hash -433930804, now seen corresponding path program 1 times [2018-01-24 23:17:47,689 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:47,690 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:47,690 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:47,690 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:47,690 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:47,702 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:47,728 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 23:17:47,728 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:47,728 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:17:47,728 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:47,729 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:17:47,729 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:17:47,729 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:17:47,730 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 4 states. [2018-01-24 23:17:47,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:47,798 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2018-01-24 23:17:47,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:17:47,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-01-24 23:17:47,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:47,799 INFO L225 Difference]: With dead ends: 47 [2018-01-24 23:17:47,799 INFO L226 Difference]: Without dead ends: 46 [2018-01-24 23:17:47,800 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 23:17:47,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-01-24 23:17:47,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-01-24 23:17:47,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-01-24 23:17:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2018-01-24 23:17:47,806 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 14 [2018-01-24 23:17:47,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:47,807 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2018-01-24 23:17:47,807 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:17:47,807 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2018-01-24 23:17:47,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 23:17:47,807 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:47,808 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:17:47,808 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cstrcmpErr0RequiresViolation, cstrcmpErr9RequiresViolation, cstrcmpErr4RequiresViolation, cstrcmpErr7RequiresViolation, cstrcmpErr5RequiresViolation, cstrcmpErr6RequiresViolation, cstrcmpErr1RequiresViolation, cstrcmpErr3RequiresViolation, cstrcmpErr2RequiresViolation, cstrcmpErr8RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:47,808 INFO L82 PathProgramCache]: Analyzing trace with hash 2009852195, now seen corresponding path program 1 times [2018-01-24 23:17:47,808 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:47,809 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:47,809 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:47,810 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:47,810 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:47,823 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:47,861 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 23:17:47,861 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:47,861 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:17:47,861 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:47,862 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:17:47,862 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:17:47,862 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:17:47,862 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 5 states. [2018-01-24 23:17:47,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:47,928 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2018-01-24 23:17:47,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:17:47,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-01-24 23:17:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:47,929 INFO L225 Difference]: With dead ends: 46 [2018-01-24 23:17:47,929 INFO L226 Difference]: Without dead ends: 44 [2018-01-24 23:17:47,929 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:17:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-01-24 23:17:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-01-24 23:17:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-01-24 23:17:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2018-01-24 23:17:47,934 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 18 [2018-01-24 23:17:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:47,934 INFO L432 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2018-01-24 23:17:47,934 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:17:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2018-01-24 23:17:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 23:17:47,935 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:47,935 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:17:47,935 INFO L371 AbstractCegarLoop]: === Iteration 6 === [cstrcmpErr0RequiresViolation, cstrcmpErr9RequiresViolation, cstrcmpErr4RequiresViolation, cstrcmpErr7RequiresViolation, cstrcmpErr5RequiresViolation, cstrcmpErr6RequiresViolation, cstrcmpErr1RequiresViolation, cstrcmpErr3RequiresViolation, cstrcmpErr2RequiresViolation, cstrcmpErr8RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:47,935 INFO L82 PathProgramCache]: Analyzing trace with hash 2009852196, now seen corresponding path program 1 times [2018-01-24 23:17:47,936 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:47,936 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:47,936 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:47,937 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:47,937 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:47,949 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:48,053 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 23:17:48,054 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:48,054 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-24 23:17:48,054 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:48,054 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 23:17:48,054 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 23:17:48,055 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:17:48,055 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 8 states. [2018-01-24 23:17:48,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:48,165 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2018-01-24 23:17:48,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 23:17:48,165 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2018-01-24 23:17:48,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:48,168 INFO L225 Difference]: With dead ends: 61 [2018-01-24 23:17:48,168 INFO L226 Difference]: Without dead ends: 59 [2018-01-24 23:17:48,168 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-01-24 23:17:48,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-24 23:17:48,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2018-01-24 23:17:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-24 23:17:48,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2018-01-24 23:17:48,173 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 18 [2018-01-24 23:17:48,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:48,173 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2018-01-24 23:17:48,174 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 23:17:48,174 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2018-01-24 23:17:48,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 23:17:48,174 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:48,174 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:17:48,174 INFO L371 AbstractCegarLoop]: === Iteration 7 === [cstrcmpErr0RequiresViolation, cstrcmpErr9RequiresViolation, cstrcmpErr4RequiresViolation, cstrcmpErr7RequiresViolation, cstrcmpErr5RequiresViolation, cstrcmpErr6RequiresViolation, cstrcmpErr1RequiresViolation, cstrcmpErr3RequiresViolation, cstrcmpErr2RequiresViolation, cstrcmpErr8RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:48,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1267324412, now seen corresponding path program 1 times [2018-01-24 23:17:48,175 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:48,175 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:48,175 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:48,176 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:48,176 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:48,185 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:48,227 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 23:17:48,227 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:48,227 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:17:48,227 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:48,228 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:17:48,228 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:17:48,228 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:17:48,228 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 6 states. [2018-01-24 23:17:48,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:48,354 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2018-01-24 23:17:48,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:17:48,394 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-01-24 23:17:48,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:48,395 INFO L225 Difference]: With dead ends: 50 [2018-01-24 23:17:48,395 INFO L226 Difference]: Without dead ends: 49 [2018-01-24 23:17:48,396 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:17:48,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-24 23:17:48,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-01-24 23:17:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-24 23:17:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2018-01-24 23:17:48,401 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 20 [2018-01-24 23:17:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:48,401 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2018-01-24 23:17:48,401 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:17:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2018-01-24 23:17:48,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-24 23:17:48,402 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:48,402 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:17:48,403 INFO L371 AbstractCegarLoop]: === Iteration 8 === [cstrcmpErr0RequiresViolation, cstrcmpErr9RequiresViolation, cstrcmpErr4RequiresViolation, cstrcmpErr7RequiresViolation, cstrcmpErr5RequiresViolation, cstrcmpErr6RequiresViolation, cstrcmpErr1RequiresViolation, cstrcmpErr3RequiresViolation, cstrcmpErr2RequiresViolation, cstrcmpErr8RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:48,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1267324411, now seen corresponding path program 1 times [2018-01-24 23:17:48,403 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:48,404 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:48,404 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:48,404 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:48,404 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:48,416 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:48,503 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 23:17:48,504 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:48,504 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 23:17:48,504 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:48,504 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 23:17:48,504 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 23:17:48,505 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-01-24 23:17:48,505 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 9 states. [2018-01-24 23:17:48,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:48,607 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2018-01-24 23:17:48,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 23:17:48,607 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-01-24 23:17:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:48,608 INFO L225 Difference]: With dead ends: 50 [2018-01-24 23:17:48,608 INFO L226 Difference]: Without dead ends: 49 [2018-01-24 23:17:48,608 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-01-24 23:17:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-01-24 23:17:48,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-01-24 23:17:48,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-24 23:17:48,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2018-01-24 23:17:48,613 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 20 [2018-01-24 23:17:48,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:48,613 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2018-01-24 23:17:48,613 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 23:17:48,613 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2018-01-24 23:17:48,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 23:17:48,614 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:48,614 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] [2018-01-24 23:17:48,614 INFO L371 AbstractCegarLoop]: === Iteration 9 === [cstrcmpErr0RequiresViolation, cstrcmpErr9RequiresViolation, cstrcmpErr4RequiresViolation, cstrcmpErr7RequiresViolation, cstrcmpErr5RequiresViolation, cstrcmpErr6RequiresViolation, cstrcmpErr1RequiresViolation, cstrcmpErr3RequiresViolation, cstrcmpErr2RequiresViolation, cstrcmpErr8RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:48,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1871951781, now seen corresponding path program 1 times [2018-01-24 23:17:48,614 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:48,615 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:48,615 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:48,615 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:48,615 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:48,625 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:48,678 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 23:17:48,678 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:48,678 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:17:48,678 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:48,679 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:17:48,679 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:17:48,679 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:17:48,679 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 6 states. [2018-01-24 23:17:48,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:48,744 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-01-24 23:17:48,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:17:48,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-01-24 23:17:48,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:48,746 INFO L225 Difference]: With dead ends: 49 [2018-01-24 23:17:48,746 INFO L226 Difference]: Without dead ends: 48 [2018-01-24 23:17:48,746 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:17:48,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-01-24 23:17:48,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-01-24 23:17:48,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-24 23:17:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2018-01-24 23:17:48,752 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 22 [2018-01-24 23:17:48,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:48,752 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2018-01-24 23:17:48,752 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:17:48,752 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2018-01-24 23:17:48,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 23:17:48,753 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:48,753 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] [2018-01-24 23:17:48,753 INFO L371 AbstractCegarLoop]: === Iteration 10 === [cstrcmpErr0RequiresViolation, cstrcmpErr9RequiresViolation, cstrcmpErr4RequiresViolation, cstrcmpErr7RequiresViolation, cstrcmpErr5RequiresViolation, cstrcmpErr6RequiresViolation, cstrcmpErr1RequiresViolation, cstrcmpErr3RequiresViolation, cstrcmpErr2RequiresViolation, cstrcmpErr8RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:48,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1871951782, now seen corresponding path program 1 times [2018-01-24 23:17:48,754 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:48,754 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:48,755 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:48,755 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:48,755 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:48,767 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:48,865 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 23:17:48,865 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:48,865 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-24 23:17:48,865 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:48,866 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-24 23:17:48,866 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-24 23:17:48,866 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:17:48,866 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 8 states. [2018-01-24 23:17:48,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:48,977 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2018-01-24 23:17:48,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 23:17:48,980 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-01-24 23:17:48,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:48,981 INFO L225 Difference]: With dead ends: 58 [2018-01-24 23:17:48,981 INFO L226 Difference]: Without dead ends: 57 [2018-01-24 23:17:48,982 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-01-24 23:17:48,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-24 23:17:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2018-01-24 23:17:48,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-24 23:17:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2018-01-24 23:17:48,986 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 22 [2018-01-24 23:17:48,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:48,986 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2018-01-24 23:17:48,986 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-24 23:17:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2018-01-24 23:17:48,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-24 23:17:48,987 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:48,987 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] [2018-01-24 23:17:48,987 INFO L371 AbstractCegarLoop]: === Iteration 11 === [cstrcmpErr0RequiresViolation, cstrcmpErr9RequiresViolation, cstrcmpErr4RequiresViolation, cstrcmpErr7RequiresViolation, cstrcmpErr5RequiresViolation, cstrcmpErr6RequiresViolation, cstrcmpErr1RequiresViolation, cstrcmpErr3RequiresViolation, cstrcmpErr2RequiresViolation, cstrcmpErr8RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:48,987 INFO L82 PathProgramCache]: Analyzing trace with hash -645685358, now seen corresponding path program 1 times [2018-01-24 23:17:48,987 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:48,988 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:48,988 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:48,988 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:48,988 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:48,997 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:49,046 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 23:17:49,047 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:49,047 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:17:49,047 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:49,048 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:17:49,048 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:17:49,048 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:17:49,048 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 6 states. [2018-01-24 23:17:49,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:49,133 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-01-24 23:17:49,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:17:49,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2018-01-24 23:17:49,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:49,134 INFO L225 Difference]: With dead ends: 49 [2018-01-24 23:17:49,134 INFO L226 Difference]: Without dead ends: 48 [2018-01-24 23:17:49,134 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:17:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-01-24 23:17:49,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-01-24 23:17:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-24 23:17:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2018-01-24 23:17:49,140 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 24 [2018-01-24 23:17:49,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:49,140 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2018-01-24 23:17:49,140 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:17:49,140 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2018-01-24 23:17:49,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-24 23:17:49,141 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:49,141 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] [2018-01-24 23:17:49,141 INFO L371 AbstractCegarLoop]: === Iteration 12 === [cstrcmpErr0RequiresViolation, cstrcmpErr9RequiresViolation, cstrcmpErr4RequiresViolation, cstrcmpErr7RequiresViolation, cstrcmpErr5RequiresViolation, cstrcmpErr6RequiresViolation, cstrcmpErr1RequiresViolation, cstrcmpErr3RequiresViolation, cstrcmpErr2RequiresViolation, cstrcmpErr8RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:49,142 INFO L82 PathProgramCache]: Analyzing trace with hash -645685357, now seen corresponding path program 1 times [2018-01-24 23:17:49,142 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:49,143 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:49,143 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:49,143 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:49,143 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:49,152 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:49,238 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 23:17:49,238 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:49,238 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 23:17:49,238 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:49,238 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 23:17:49,239 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 23:17:49,239 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-01-24 23:17:49,239 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 9 states. [2018-01-24 23:17:49,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:49,443 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2018-01-24 23:17:49,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-24 23:17:49,444 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2018-01-24 23:17:49,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:49,444 INFO L225 Difference]: With dead ends: 58 [2018-01-24 23:17:49,444 INFO L226 Difference]: Without dead ends: 57 [2018-01-24 23:17:49,445 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-01-24 23:17:49,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-24 23:17:49,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2018-01-24 23:17:49,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-01-24 23:17:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2018-01-24 23:17:49,448 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 24 [2018-01-24 23:17:49,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:49,448 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2018-01-24 23:17:49,449 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 23:17:49,449 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2018-01-24 23:17:49,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 23:17:49,449 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:49,450 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:17:49,450 INFO L371 AbstractCegarLoop]: === Iteration 13 === [cstrcmpErr0RequiresViolation, cstrcmpErr9RequiresViolation, cstrcmpErr4RequiresViolation, cstrcmpErr7RequiresViolation, cstrcmpErr5RequiresViolation, cstrcmpErr6RequiresViolation, cstrcmpErr1RequiresViolation, cstrcmpErr3RequiresViolation, cstrcmpErr2RequiresViolation, cstrcmpErr8RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:49,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1460131898, now seen corresponding path program 1 times [2018-01-24 23:17:49,450 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:49,451 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:49,451 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:49,451 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:49,451 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:49,464 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:49,715 WARN L146 SmtUtils]: Spent 130ms on a formula simplification. DAG size of input: 23 DAG size of output 14 [2018-01-24 23:17:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:17:49,862 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:17:49,862 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-01-24 23:17:49,862 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:17:49,862 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-24 23:17:49,862 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-24 23:17:49,862 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2018-01-24 23:17:49,862 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2018-01-24 23:17:50,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:17:50,111 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2018-01-24 23:17:50,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-24 23:17:50,111 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2018-01-24 23:17:50,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:17:50,112 INFO L225 Difference]: With dead ends: 106 [2018-01-24 23:17:50,112 INFO L226 Difference]: Without dead ends: 81 [2018-01-24 23:17:50,112 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2018-01-24 23:17:50,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-01-24 23:17:50,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2018-01-24 23:17:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-01-24 23:17:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2018-01-24 23:17:50,118 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 25 [2018-01-24 23:17:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:17:50,118 INFO L432 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2018-01-24 23:17:50,118 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-24 23:17:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2018-01-24 23:17:50,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 23:17:50,119 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:17:50,120 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:17:50,120 INFO L371 AbstractCegarLoop]: === Iteration 14 === [cstrcmpErr0RequiresViolation, cstrcmpErr9RequiresViolation, cstrcmpErr4RequiresViolation, cstrcmpErr7RequiresViolation, cstrcmpErr5RequiresViolation, cstrcmpErr6RequiresViolation, cstrcmpErr1RequiresViolation, cstrcmpErr3RequiresViolation, cstrcmpErr2RequiresViolation, cstrcmpErr8RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr0RequiresViolation, mainErr4EnsuresViolation]=== [2018-01-24 23:17:50,120 INFO L82 PathProgramCache]: Analyzing trace with hash -228811844, now seen corresponding path program 1 times [2018-01-24 23:17:50,120 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:17:50,121 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:50,121 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:17:50,121 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:17:50,121 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:17:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:17:50,134 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:17:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:17:50,331 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:17:50,331 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:17:50,332 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2018-01-24 23:17:50,334 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [6], [8], [10], [11], [12], [19], [20], [26], [42], [47], [51], [55], [56], [57], [58], [59], [62], [73], [74], [75], [77] [2018-01-24 23:17:50,379 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:17:50,379 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