java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf -i ../../../trunk/examples/svcomp/heap-manipulation/dancing_true-unreach-call_false-valid-memtrack.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 10:42:42,750 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 10:42:42,752 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 10:42:42,765 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 10:42:42,766 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 10:42:42,767 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 10:42:42,768 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 10:42:42,769 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 10:42:42,771 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 10:42:42,771 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 10:42:42,772 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-01-21 10:42:42,791 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 10:42:42,791 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 10:42:42,792 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf [2018-01-21 10:42:42,802 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 10:42:42,802 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 10:42:42,803 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 10:42:42,803 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 10:42:42,803 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 10:42:42,803 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 10:42:42,804 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 10:42:42,804 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 10:42:42,804 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 10:42:42,805 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 10:42:42,805 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 10:42:42,805 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 10:42:42,805 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 10:42:42,805 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 10:42:42,806 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 10:42:42,806 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 10:42:42,806 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 10:42:42,806 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 10:42:42,806 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 10:42:42,807 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 10:42:42,807 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 10:42:42,807 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 10:42:42,807 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 10:42:42,807 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 10:42:42,808 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 10:42:42,808 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 10:42:42,808 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 10:42:42,808 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 10:42:42,808 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 10:42:42,809 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 10:42:42,809 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 10:42:42,809 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 10:42:42,809 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 10:42:42,809 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 10:42:42,810 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 10:42:42,810 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 10:42:42,810 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 10:42:42,811 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 10:42:42,811 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 10:42:42,845 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 10:42:42,857 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 10:42:42,861 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 10:42:42,863 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 10:42:42,863 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 10:42:42,864 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/dancing_true-unreach-call_false-valid-memtrack.i [2018-01-21 10:42:43,049 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 10:42:43,055 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 10:42:43,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 10:42:43,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 10:42:43,063 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 10:42:43,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 10:42:43" (1/1) ... [2018-01-21 10:42:43,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22bbba22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:42:43, skipping insertion in model container [2018-01-21 10:42:43,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 10:42:43" (1/1) ... [2018-01-21 10:42:43,080 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 10:42:43,117 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 10:42:43,237 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 10:42:43,255 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 10:42:43,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:42:43 WrapperNode [2018-01-21 10:42:43,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 10:42:43,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 10:42:43,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 10:42:43,267 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 10:42:43,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:42:43" (1/1) ... [2018-01-21 10:42:43,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:42:43" (1/1) ... [2018-01-21 10:42:43,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:42:43" (1/1) ... [2018-01-21 10:42:43,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:42:43" (1/1) ... [2018-01-21 10:42:43,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:42:43" (1/1) ... [2018-01-21 10:42:43,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:42:43" (1/1) ... [2018-01-21 10:42:43,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:42:43" (1/1) ... [2018-01-21 10:42:43,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 10:42:43,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 10:42:43,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 10:42:43,313 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 10:42:43,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:42:43" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 10:42:43,366 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 10:42:43,366 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 10:42:43,366 INFO L136 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-01-21 10:42:43,366 INFO L136 BoogieDeclarations]: Found implementation of procedure remove [2018-01-21 10:42:43,366 INFO L136 BoogieDeclarations]: Found implementation of procedure re_insert [2018-01-21 10:42:43,366 INFO L136 BoogieDeclarations]: Found implementation of procedure is_list_containing_x [2018-01-21 10:42:43,367 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 10:42:43,367 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 10:42:43,367 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 10:42:43,367 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 10:42:43,367 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 10:42:43,367 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 10:42:43,368 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2018-01-21 10:42:43,368 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2018-01-21 10:42:43,368 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 10:42:43,368 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-01-21 10:42:43,368 INFO L128 BoogieDeclarations]: Found specification of procedure remove [2018-01-21 10:42:43,368 INFO L128 BoogieDeclarations]: Found specification of procedure re_insert [2018-01-21 10:42:43,369 INFO L128 BoogieDeclarations]: Found specification of procedure is_list_containing_x [2018-01-21 10:42:43,369 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 10:42:43,369 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 10:42:43,369 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 10:42:43,681 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 10:42:43,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 10:42:43 BoogieIcfgContainer [2018-01-21 10:42:43,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 10:42:43,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 10:42:43,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 10:42:43,724 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 10:42:43,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 10:42:43" (1/3) ... [2018-01-21 10:42:43,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a2fcd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 10:42:43, skipping insertion in model container [2018-01-21 10:42:43,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:42:43" (2/3) ... [2018-01-21 10:42:43,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a2fcd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 10:42:43, skipping insertion in model container [2018-01-21 10:42:43,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 10:42:43" (3/3) ... [2018-01-21 10:42:43,728 INFO L105 eAbstractionObserver]: Analyzing ICFG dancing_true-unreach-call_false-valid-memtrack.i [2018-01-21 10:42:43,735 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 10:42:43,742 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-01-21 10:42:43,781 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:42:43,781 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:42:43,781 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:42:43,781 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:42:43,781 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:42:43,782 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:42:43,782 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:42:43,782 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 10:42:43,783 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:42:43,801 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2018-01-21 10:42:43,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 10:42:43,806 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:42:43,807 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 10:42:43,807 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 10:42:43,811 INFO L82 PathProgramCache]: Analyzing trace with hash 178905, now seen corresponding path program 1 times [2018-01-21 10:42:43,813 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:42:43,854 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:42:43,855 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:42:43,855 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:42:43,855 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:42:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:42:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:42:43,912 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 10:42:43,919 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:42:43,927 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:42:43,927 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:42:43,927 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:42:43,927 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:42:43,927 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:42:43,928 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:42:43,928 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:42:43,928 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == re_insertErr0EnsuresViolation======== [2018-01-21 10:42:43,928 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:42:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2018-01-21 10:42:43,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-21 10:42:43,935 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:42:43,935 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:42:43,935 INFO L371 AbstractCegarLoop]: === Iteration 1 === [re_insertErr0EnsuresViolation]=== [2018-01-21 10:42:43,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1611447727, now seen corresponding path program 1 times [2018-01-21 10:42:43,936 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:42:43,937 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:42:43,937 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:42:43,937 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:42:43,937 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:42:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:42:43,968 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:42:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 10:42:44,028 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:42:44,028 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 10:42:44,029 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:42:44,031 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 10:42:44,135 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 10:42:44,136 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:42:44,138 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 2 states. [2018-01-21 10:42:44,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:42:44,165 INFO L93 Difference]: Finished difference Result 149 states and 181 transitions. [2018-01-21 10:42:44,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 10:42:44,166 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 39 [2018-01-21 10:42:44,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:42:44,171 INFO L225 Difference]: With dead ends: 149 [2018-01-21 10:42:44,172 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 10:42:44,175 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:42:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 10:42:44,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 10:42:44,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 10:42:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 10:42:44,195 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2018-01-21 10:42:44,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:42:44,195 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 10:42:44,195 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 10:42:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 10:42:44,195 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 10:42:44,198 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:42:44,198 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:42:44,198 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:42:44,199 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:42:44,199 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:42:44,199 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:42:44,199 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:42:44,199 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 10:42:44,199 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:42:44,202 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2018-01-21 10:42:44,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-21 10:42:44,206 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:42:44,206 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:42:44,206 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:42:44,206 INFO L82 PathProgramCache]: Analyzing trace with hash -715233718, now seen corresponding path program 1 times [2018-01-21 10:42:44,207 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:42:44,208 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:42:44,208 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:42:44,208 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:42:44,208 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:42:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:42:44,225 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:42:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-21 10:42:44,262 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:42:44,262 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 10:42:44,262 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:42:44,263 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 10:42:44,263 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 10:42:44,263 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:42:44,264 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 2 states. [2018-01-21 10:42:44,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:42:44,276 INFO L93 Difference]: Finished difference Result 149 states and 181 transitions. [2018-01-21 10:42:44,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 10:42:44,276 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 56 [2018-01-21 10:42:44,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:42:44,281 INFO L225 Difference]: With dead ends: 149 [2018-01-21 10:42:44,281 INFO L226 Difference]: Without dead ends: 78 [2018-01-21 10:42:44,283 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:42:44,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-01-21 10:42:44,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-01-21 10:42:44,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-01-21 10:42:44,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2018-01-21 10:42:44,306 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 56 [2018-01-21 10:42:44,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:42:44,306 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2018-01-21 10:42:44,306 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 10:42:44,307 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2018-01-21 10:42:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-21 10:42:44,311 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:42:44,311 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:42:44,311 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:42:44,312 INFO L82 PathProgramCache]: Analyzing trace with hash 675519653, now seen corresponding path program 1 times [2018-01-21 10:42:44,312 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:42:44,313 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:42:44,313 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:42:44,313 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:42:44,313 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:42:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:42:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:42:44,415 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 10:42:44,425 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:42:44,427 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:42:44,429 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:42:44,430 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:42:44,431 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:42:44,432 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:42:44,433 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:42:44,433 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:42:44,434 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:42:44,445 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:42:44,445 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:42:44,445 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:42:44,446 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:42:44,446 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:42:44,446 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:42:44,446 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:42:44,446 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 10:42:44,446 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:42:44,448 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2018-01-21 10:42:44,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-01-21 10:42:44,451 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:42:44,451 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:42:44,451 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 10:42:44,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1572438346, now seen corresponding path program 1 times [2018-01-21 10:42:44,451 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:42:44,453 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:42:44,453 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:42:44,453 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:42:44,453 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:42:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:42:44,465 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:42:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-21 10:42:44,490 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:42:44,490 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 10:42:44,490 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:42:44,491 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 10:42:44,491 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 10:42:44,491 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:42:44,491 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 2 states. [2018-01-21 10:42:44,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:42:44,503 INFO L93 Difference]: Finished difference Result 149 states and 181 transitions. [2018-01-21 10:42:44,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 10:42:44,503 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 54 [2018-01-21 10:42:44,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:42:44,505 INFO L225 Difference]: With dead ends: 149 [2018-01-21 10:42:44,505 INFO L226 Difference]: Without dead ends: 76 [2018-01-21 10:42:44,506 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:42:44,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-01-21 10:42:44,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-01-21 10:42:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-21 10:42:44,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2018-01-21 10:42:44,516 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 54 [2018-01-21 10:42:44,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:42:44,516 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2018-01-21 10:42:44,517 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 10:42:44,517 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2018-01-21 10:42:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-01-21 10:42:44,519 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:42:44,519 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:42:44,519 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 10:42:44,519 INFO L82 PathProgramCache]: Analyzing trace with hash 362713701, now seen corresponding path program 1 times [2018-01-21 10:42:44,519 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:42:44,520 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:42:44,520 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:42:44,520 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:42:44,521 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:42:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:42:44,542 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:42:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-21 10:42:44,685 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:42:44,686 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 10:42:44,686 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:42:44,686 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 10:42:44,687 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 10:42:44,687 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 10:42:44,687 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 4 states. [2018-01-21 10:42:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:42:44,929 INFO L93 Difference]: Finished difference Result 96 states and 117 transitions. [2018-01-21 10:42:44,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 10:42:44,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2018-01-21 10:42:44,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:42:44,933 INFO L225 Difference]: With dead ends: 96 [2018-01-21 10:42:44,933 INFO L226 Difference]: Without dead ends: 79 [2018-01-21 10:42:44,935 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 10:42:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-01-21 10:42:44,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2018-01-21 10:42:44,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-01-21 10:42:44,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2018-01-21 10:42:44,945 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 55 [2018-01-21 10:42:44,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:42:44,946 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2018-01-21 10:42:44,946 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 10:42:44,946 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2018-01-21 10:42:44,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-01-21 10:42:44,949 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:42:44,949 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:42:44,950 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 10:42:44,950 INFO L82 PathProgramCache]: Analyzing trace with hash 2096216182, now seen corresponding path program 1 times [2018-01-21 10:42:44,950 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:42:44,951 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:42:44,951 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:42:44,952 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:42:44,952 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:42:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:42:44,965 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:42:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-21 10:42:45,008 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:42:45,008 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 10:42:45,008 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:42:45,008 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 10:42:45,009 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 10:42:45,009 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 10:42:45,009 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 4 states. [2018-01-21 10:42:45,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:42:45,048 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2018-01-21 10:42:45,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 10:42:45,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2018-01-21 10:42:45,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:42:45,050 INFO L225 Difference]: With dead ends: 138 [2018-01-21 10:42:45,050 INFO L226 Difference]: Without dead ends: 80 [2018-01-21 10:42:45,051 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 10:42:45,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-01-21 10:42:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2018-01-21 10:42:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-01-21 10:42:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2018-01-21 10:42:45,057 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 58 [2018-01-21 10:42:45,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:42:45,058 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2018-01-21 10:42:45,058 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 10:42:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2018-01-21 10:42:45,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-01-21 10:42:45,059 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:42:45,059 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:42:45,059 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 10:42:45,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1351865632, now seen corresponding path program 1 times [2018-01-21 10:42:45,059 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:42:45,060 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:42:45,060 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:42:45,060 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:42:45,060 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:42:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:42:45,071 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:42:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-01-21 10:42:45,186 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:42:45,187 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 10:42:45,194 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 65 with the following transitions: [2018-01-21 10:42:45,196 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [7], [11], [13], [14], [15], [20], [21], [22], [23], [26], [34], [36], [39], [46], [50], [51], [52], [54], [55], [58], [68], [70], [71], [80], [82], [91], [93], [95], [96], [98], [99], [107], [109], [117], [119], [125], [132], [134], [136], [137], [138], [139], [142], [143], [144], [145], [146], [147], [148], [149], [152], [153], [154] [2018-01-21 10:42:45,250 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 10:42:45,251 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