java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 18:50:07,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 18:50:07,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 18:50:07,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 18:50:07,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 18:50:07,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 18:50:07,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 18:50:07,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 18:50:07,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 18:50:07,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 18:50:07,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 18:50:07,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 18:50:07,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 18:50:07,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 18:50:07,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 18:50:07,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 18:50:07,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 18:50:07,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 18:50:07,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 18:50:07,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 18:50:07,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 18:50:07,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 18:50:07,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 18:50:07,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 18:50:07,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 18:50:07,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 18:50:07,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 18:50:07,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 18:50:07,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 18:50:07,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 18:50:07,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 18:50:07,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 18:50:07,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 18:50:07,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 18:50:07,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 18:50:07,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 18:50:07,964 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 18:50:07,979 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 18:50:07,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 18:50:07,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 18:50:07,980 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 18:50:07,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 18:50:07,981 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 18:50:07,981 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 18:50:07,981 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 18:50:07,982 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 18:50:07,982 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 18:50:07,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 18:50:07,983 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 18:50:07,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 18:50:07,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 18:50:07,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 18:50:07,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 18:50:07,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 18:50:07,984 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 18:50:07,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 18:50:07,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 18:50:07,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 18:50:07,985 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 18:50:07,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 18:50:07,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 18:50:07,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 18:50:07,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 18:50:07,986 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 18:50:07,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 18:50:07,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 18:50:07,986 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 18:50:08,015 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 18:50:08,029 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 18:50:08,032 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 18:50:08,033 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 18:50:08,033 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 18:50:08,034 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label22.c [2019-10-02 18:50:08,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c2df3d65/761685d5e39b4325b5633c1659f152da/FLAG9efdb5ca3 [2019-10-02 18:50:08,706 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 18:50:08,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label22.c [2019-10-02 18:50:08,725 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c2df3d65/761685d5e39b4325b5633c1659f152da/FLAG9efdb5ca3 [2019-10-02 18:50:08,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c2df3d65/761685d5e39b4325b5633c1659f152da [2019-10-02 18:50:08,950 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 18:50:08,952 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 18:50:08,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 18:50:08,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 18:50:08,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 18:50:08,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:50:08" (1/1) ... [2019-10-02 18:50:08,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2504eb85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:08, skipping insertion in model container [2019-10-02 18:50:08,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:50:08" (1/1) ... [2019-10-02 18:50:08,968 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 18:50:09,028 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 18:50:09,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:50:09,548 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 18:50:09,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:50:09,728 INFO L192 MainTranslator]: Completed translation [2019-10-02 18:50:09,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:09 WrapperNode [2019-10-02 18:50:09,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 18:50:09,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 18:50:09,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 18:50:09,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 18:50:09,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:09" (1/1) ... [2019-10-02 18:50:09,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:09" (1/1) ... [2019-10-02 18:50:09,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:09" (1/1) ... [2019-10-02 18:50:09,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:09" (1/1) ... [2019-10-02 18:50:09,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:09" (1/1) ... [2019-10-02 18:50:09,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:09" (1/1) ... [2019-10-02 18:50:09,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:09" (1/1) ... [2019-10-02 18:50:09,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 18:50:09,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 18:50:09,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 18:50:09,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 18:50:09,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:09" (1/1) ... No working directory specified, using /storage/repos/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 [2019-10-02 18:50:09,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 18:50:09,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 18:50:09,938 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 18:50:09,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 18:50:09,939 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 18:50:09,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 18:50:09,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 18:50:09,940 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 18:50:09,940 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 18:50:09,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 18:50:09,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 18:50:11,499 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 18:50:11,499 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 18:50:11,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:50:11 BoogieIcfgContainer [2019-10-02 18:50:11,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 18:50:11,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 18:50:11,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 18:50:11,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 18:50:11,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 06:50:08" (1/3) ... [2019-10-02 18:50:11,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4782e28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:50:11, skipping insertion in model container [2019-10-02 18:50:11,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:09" (2/3) ... [2019-10-02 18:50:11,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4782e28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:50:11, skipping insertion in model container [2019-10-02 18:50:11,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:50:11" (3/3) ... [2019-10-02 18:50:11,510 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label22.c [2019-10-02 18:50:11,520 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 18:50:11,529 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 18:50:11,546 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 18:50:11,575 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 18:50:11,576 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 18:50:11,576 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 18:50:11,576 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 18:50:11,577 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 18:50:11,578 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 18:50:11,578 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 18:50:11,579 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 18:50:11,614 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-02 18:50:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-02 18:50:11,629 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:50:11,630 INFO L411 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, 1, 1, 1, 1] [2019-10-02 18:50:11,632 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:50:11,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:50:11,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1257002150, now seen corresponding path program 1 times [2019-10-02 18:50:11,641 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:50:11,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:11,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:50:11,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:11,699 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:50:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:50:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:50:11,916 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:50:11,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 18:50:11,917 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:50:11,923 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 18:50:11,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 18:50:11,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 18:50:11,940 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-10-02 18:50:13,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:50:13,711 INFO L93 Difference]: Finished difference Result 524 states and 782 transitions. [2019-10-02 18:50:13,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 18:50:13,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-10-02 18:50:13,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:50:13,733 INFO L225 Difference]: With dead ends: 524 [2019-10-02 18:50:13,733 INFO L226 Difference]: Without dead ends: 437 [2019-10-02 18:50:13,735 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 18:50:13,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-10-02 18:50:13,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2019-10-02 18:50:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-10-02 18:50:13,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 633 transitions. [2019-10-02 18:50:13,839 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 633 transitions. Word has length 43 [2019-10-02 18:50:13,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:50:13,840 INFO L475 AbstractCegarLoop]: Abstraction has 437 states and 633 transitions. [2019-10-02 18:50:13,840 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 18:50:13,840 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 633 transitions. [2019-10-02 18:50:13,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-02 18:50:13,850 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:50:13,851 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 18:50:13,851 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:50:13,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:50:13,852 INFO L82 PathProgramCache]: Analyzing trace with hash 961573706, now seen corresponding path program 1 times [2019-10-02 18:50:13,852 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:50:13,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:13,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:50:13,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:13,854 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:50:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:50:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:50:14,118 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:50:14,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 18:50:14,118 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:50:14,120 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 18:50:14,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 18:50:14,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 18:50:14,121 INFO L87 Difference]: Start difference. First operand 437 states and 633 transitions. Second operand 6 states. [2019-10-02 18:50:15,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:50:15,067 INFO L93 Difference]: Finished difference Result 898 states and 1344 transitions. [2019-10-02 18:50:15,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 18:50:15,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2019-10-02 18:50:15,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:50:15,079 INFO L225 Difference]: With dead ends: 898 [2019-10-02 18:50:15,080 INFO L226 Difference]: Without dead ends: 898 [2019-10-02 18:50:15,081 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 18:50:15,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2019-10-02 18:50:15,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 880. [2019-10-02 18:50:15,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2019-10-02 18:50:15,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1284 transitions. [2019-10-02 18:50:15,137 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1284 transitions. Word has length 117 [2019-10-02 18:50:15,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:50:15,138 INFO L475 AbstractCegarLoop]: Abstraction has 880 states and 1284 transitions. [2019-10-02 18:50:15,138 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 18:50:15,139 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1284 transitions. [2019-10-02 18:50:15,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-02 18:50:15,143 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:50:15,144 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 18:50:15,144 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:50:15,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:50:15,144 INFO L82 PathProgramCache]: Analyzing trace with hash -956258770, now seen corresponding path program 1 times [2019-10-02 18:50:15,145 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:50:15,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:15,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:50:15,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:15,147 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:50:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:50:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:50:15,384 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:50:15,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 18:50:15,385 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:50:15,385 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 18:50:15,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 18:50:15,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 18:50:15,386 INFO L87 Difference]: Start difference. First operand 880 states and 1284 transitions. Second operand 6 states. [2019-10-02 18:50:16,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:50:16,328 INFO L93 Difference]: Finished difference Result 1345 states and 1936 transitions. [2019-10-02 18:50:16,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 18:50:16,330 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-10-02 18:50:16,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:50:16,339 INFO L225 Difference]: With dead ends: 1345 [2019-10-02 18:50:16,340 INFO L226 Difference]: Without dead ends: 1345 [2019-10-02 18:50:16,340 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 18:50:16,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2019-10-02 18:50:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1039. [2019-10-02 18:50:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-10-02 18:50:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1451 transitions. [2019-10-02 18:50:16,382 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1451 transitions. Word has length 119 [2019-10-02 18:50:16,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:50:16,382 INFO L475 AbstractCegarLoop]: Abstraction has 1039 states and 1451 transitions. [2019-10-02 18:50:16,383 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 18:50:16,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1451 transitions. [2019-10-02 18:50:16,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-02 18:50:16,387 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:50:16,388 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2019-10-02 18:50:16,388 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:50:16,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:50:16,388 INFO L82 PathProgramCache]: Analyzing trace with hash -550888759, now seen corresponding path program 1 times [2019-10-02 18:50:16,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:50:16,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:16,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:50:16,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:16,390 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:50:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:50:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:50:16,569 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:50:16,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-02 18:50:16,569 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:50:16,570 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 18:50:16,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 18:50:16,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-02 18:50:16,571 INFO L87 Difference]: Start difference. First operand 1039 states and 1451 transitions. Second operand 7 states. [2019-10-02 18:50:17,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:50:17,959 INFO L93 Difference]: Finished difference Result 1205 states and 1624 transitions. [2019-10-02 18:50:17,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 18:50:17,959 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 122 [2019-10-02 18:50:17,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:50:17,967 INFO L225 Difference]: With dead ends: 1205 [2019-10-02 18:50:17,967 INFO L226 Difference]: Without dead ends: 1039 [2019-10-02 18:50:17,968 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-02 18:50:17,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2019-10-02 18:50:17,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1039. [2019-10-02 18:50:18,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-10-02 18:50:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1444 transitions. [2019-10-02 18:50:18,006 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1444 transitions. Word has length 122 [2019-10-02 18:50:18,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:50:18,007 INFO L475 AbstractCegarLoop]: Abstraction has 1039 states and 1444 transitions. [2019-10-02 18:50:18,007 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 18:50:18,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1444 transitions. [2019-10-02 18:50:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-02 18:50:18,010 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:50:18,010 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2019-10-02 18:50:18,011 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:50:18,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:50:18,011 INFO L82 PathProgramCache]: Analyzing trace with hash 772314102, now seen corresponding path program 1 times [2019-10-02 18:50:18,011 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:50:18,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:18,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:50:18,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:18,015 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:50:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:50:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-02 18:50:18,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:50:18,171 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:50:18,172 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 124 with the following transitions: [2019-10-02 18:50:18,174 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [253], [255], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [538], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:50:18,262 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:50:18,262 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:50:30,382 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 18:50:30,385 INFO L272 AbstractInterpreter]: Visited 84 different actions 84 times. Never merged. Never widened. Performed 121 root evaluator evaluations with a maximum evaluation depth of 16. Performed 121 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 18:50:30,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:50:30,390 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 18:50:39,394 INFO L227 lantSequenceWeakener]: Weakened 117 states. On average, predicates are now at 73.44% of their original sizes. [2019-10-02 18:50:39,394 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 18:50:39,423 INFO L420 sIntCurrentIteration]: We unified 122 AI predicates to 122 [2019-10-02 18:50:39,423 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 18:50:39,424 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 18:50:39,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2019-10-02 18:50:39,424 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:50:39,425 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 18:50:39,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 18:50:39,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-02 18:50:39,426 INFO L87 Difference]: Start difference. First operand 1039 states and 1444 transitions. Second operand 7 states. [2019-10-02 18:50:44,066 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 18:52:20,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:52:20,566 INFO L93 Difference]: Finished difference Result 1183 states and 1596 transitions. [2019-10-02 18:52:20,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 18:52:20,566 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2019-10-02 18:52:20,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:52:20,572 INFO L225 Difference]: With dead ends: 1183 [2019-10-02 18:52:20,573 INFO L226 Difference]: Without dead ends: 1183 [2019-10-02 18:52:20,573 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-02 18:52:20,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2019-10-02 18:52:20,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1182. [2019-10-02 18:52:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2019-10-02 18:52:20,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1595 transitions. [2019-10-02 18:52:20,606 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1595 transitions. Word has length 123 [2019-10-02 18:52:20,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:52:20,606 INFO L475 AbstractCegarLoop]: Abstraction has 1182 states and 1595 transitions. [2019-10-02 18:52:20,606 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 18:52:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1595 transitions. [2019-10-02 18:52:20,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-02 18:52:20,609 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:52:20,609 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2019-10-02 18:52:20,609 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:52:20,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:52:20,610 INFO L82 PathProgramCache]: Analyzing trace with hash -491536303, now seen corresponding path program 1 times [2019-10-02 18:52:20,610 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:52:20,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:52:20,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:52:20,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:52:20,612 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:52:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:52:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-02 18:52:20,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:52:20,744 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:52:20,744 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 159 with the following transitions: [2019-10-02 18:52:20,745 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [253], [255], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:52:20,751 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:52:20,751 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:52:51,570 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 18:53:48,070 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 18:53:48,071 INFO L272 AbstractInterpreter]: Visited 122 different actions 238 times. Merged at 4 different actions 4 times. Never widened. Performed 461 root evaluator evaluations with a maximum evaluation depth of 16. Performed 461 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 18:53:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:53:48,072 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 18:54:34,534 INFO L227 lantSequenceWeakener]: Weakened 155 states. On average, predicates are now at 73.31% of their original sizes. [2019-10-02 18:54:34,535 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 18:54:34,641 INFO L420 sIntCurrentIteration]: We unified 157 AI predicates to 157 [2019-10-02 18:54:34,641 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 18:54:34,641 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 18:54:34,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [4] total 14 [2019-10-02 18:54:34,642 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:54:34,642 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 18:54:34,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 18:54:34,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-02 18:54:34,643 INFO L87 Difference]: Start difference. First operand 1182 states and 1595 transitions. Second operand 12 states. [2019-10-02 18:59:27,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:59:27,076 INFO L93 Difference]: Finished difference Result 1333 states and 1761 transitions. [2019-10-02 18:59:27,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-02 18:59:27,076 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 158 [2019-10-02 18:59:27,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:59:27,084 INFO L225 Difference]: With dead ends: 1333 [2019-10-02 18:59:27,084 INFO L226 Difference]: Without dead ends: 1333 [2019-10-02 18:59:27,085 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-10-02 18:59:27,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2019-10-02 18:59:27,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1327. [2019-10-02 18:59:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1327 states. [2019-10-02 18:59:27,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1755 transitions. [2019-10-02 18:59:27,130 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1755 transitions. Word has length 158 [2019-10-02 18:59:27,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:59:27,130 INFO L475 AbstractCegarLoop]: Abstraction has 1327 states and 1755 transitions. [2019-10-02 18:59:27,130 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-02 18:59:27,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1755 transitions. [2019-10-02 18:59:27,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-02 18:59:27,135 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:59:27,136 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 18:59:27,136 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:59:27,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:59:27,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1679265278, now seen corresponding path program 1 times [2019-10-02 18:59:27,137 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:59:27,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:59:27,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:59:27,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:59:27,138 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:59:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:59:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-02 18:59:27,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:59:27,297 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:59:27,297 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 178 with the following transitions: [2019-10-02 18:59:27,299 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [253], [255], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [754], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:59:27,308 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:59:27,308 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:01:24,115 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:01:24,116 INFO L272 AbstractInterpreter]: Visited 141 different actions 276 times. Merged at 4 different actions 4 times. Never widened. Performed 485 root evaluator evaluations with a maximum evaluation depth of 16. Performed 485 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:01:24,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:01:24,116 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:02:23,008 INFO L227 lantSequenceWeakener]: Weakened 174 states. On average, predicates are now at 73.24% of their original sizes. [2019-10-02 19:02:23,008 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:02:23,152 INFO L420 sIntCurrentIteration]: We unified 176 AI predicates to 176 [2019-10-02 19:02:23,152 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:02:23,152 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:02:23,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [4] total 17 [2019-10-02 19:02:23,152 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:02:23,153 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-02 19:02:23,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-02 19:02:23,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2019-10-02 19:02:23,154 INFO L87 Difference]: Start difference. First operand 1327 states and 1755 transitions. Second operand 15 states. [2019-10-02 19:02:31,564 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.