/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/mapsum4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:54:59,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:54:59,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:54:59,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:54:59,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:54:59,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:54:59,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:54:59,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:54:59,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:54:59,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:54:59,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:54:59,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:54:59,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:54:59,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:54:59,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:54:59,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:54:59,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:54:59,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:54:59,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:54:59,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:54:59,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:54:59,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:54:59,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:54:59,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:54:59,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:54:59,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:54:59,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:54:59,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:54:59,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-23 22:54:59,575 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:54:59,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:54:59,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:54:59,576 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:54:59,576 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:54:59,576 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:54:59,577 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:54:59,577 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:54:59,577 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:54:59,577 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:54:59,577 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:54:59,578 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:54:59,578 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:54:59,578 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:54:59,578 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:54:59,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:54:59,579 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:54:59,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:54:59,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:54:59,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:54:59,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:54:59,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:54:59,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:54:59,581 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:54:59,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:54:59,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:54:59,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:54:59,582 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:54:59,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:54:59,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:54:59,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:54:59,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:54:59,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:54:59,583 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:54:59,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:54:59,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:54:59,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:54:59,584 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:54:59,844 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:54:59,862 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:54:59,865 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:54:59,866 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:54:59,867 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:54:59,867 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapsum4.i [2019-11-23 22:54:59,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d5f72b53/a175c299c3854ed29c91971854228289/FLAG7c6045113 [2019-11-23 22:55:00,368 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:55:00,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum4.i [2019-11-23 22:55:00,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d5f72b53/a175c299c3854ed29c91971854228289/FLAG7c6045113 [2019-11-23 22:55:00,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d5f72b53/a175c299c3854ed29c91971854228289 [2019-11-23 22:55:00,772 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:55:00,774 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:55:00,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:55:00,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:55:00,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:55:00,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:55:00" (1/1) ... [2019-11-23 22:55:00,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7954cf6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:00, skipping insertion in model container [2019-11-23 22:55:00,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:55:00" (1/1) ... [2019-11-23 22:55:00,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:55:00,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:55:00,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:55:01,004 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:55:01,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:55:01,041 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:55:01,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:01 WrapperNode [2019-11-23 22:55:01,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:55:01,043 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:55:01,043 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:55:01,043 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:55:01,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:01" (1/1) ... [2019-11-23 22:55:01,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:01" (1/1) ... [2019-11-23 22:55:01,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:55:01,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:55:01,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:55:01,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:55:01,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:01" (1/1) ... [2019-11-23 22:55:01,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:01" (1/1) ... [2019-11-23 22:55:01,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:01" (1/1) ... [2019-11-23 22:55:01,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:01" (1/1) ... [2019-11-23 22:55:01,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:01" (1/1) ... [2019-11-23 22:55:01,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:01" (1/1) ... [2019-11-23 22:55:01,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:01" (1/1) ... [2019-11-23 22:55:01,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:55:01,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:55:01,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:55:01,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:55:01,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:01" (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 [2019-11-23 22:55:01,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:55:01,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:55:01,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:55:01,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:55:01,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:55:01,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:55:01,710 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:55:01,710 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:55:01,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:55:01 BoogieIcfgContainer [2019-11-23 22:55:01,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:55:01,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:55:01,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:55:01,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:55:01,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:55:00" (1/3) ... [2019-11-23 22:55:01,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7258a86a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:55:01, skipping insertion in model container [2019-11-23 22:55:01,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:01" (2/3) ... [2019-11-23 22:55:01,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7258a86a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:55:01, skipping insertion in model container [2019-11-23 22:55:01,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:55:01" (3/3) ... [2019-11-23 22:55:01,719 INFO L109 eAbstractionObserver]: Analyzing ICFG mapsum4.i [2019-11-23 22:55:01,728 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:55:01,735 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:55:01,746 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:55:01,764 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:55:01,764 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:55:01,764 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:55:01,764 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:55:01,764 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:55:01,764 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:55:01,765 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:55:01,765 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:55:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 22:55:01,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:55:01,783 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:55:01,784 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:55:01,784 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:55:01,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:55:01,790 INFO L82 PathProgramCache]: Analyzing trace with hash -977729615, now seen corresponding path program 1 times [2019-11-23 22:55:01,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:55:01,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629080852] [2019-11-23 22:55:01,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:55:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:55:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:55:01,947 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629080852] [2019-11-23 22:55:01,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:55:01,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:55:01,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573895155] [2019-11-23 22:55:01,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:55:01,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:55:01,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:55:01,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:55:01,972 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-23 22:55:02,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:55:02,000 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-23 22:55:02,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:55:02,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 22:55:02,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:55:02,014 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:55:02,014 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:55:02,018 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:55:02,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:55:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 22:55:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 22:55:02,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2019-11-23 22:55:02,057 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2019-11-23 22:55:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:55:02,057 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-23 22:55:02,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:55:02,058 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2019-11-23 22:55:02,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:55:02,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:55:02,058 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:55:02,059 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:55:02,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:55:02,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1165895748, now seen corresponding path program 1 times [2019-11-23 22:55:02,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:55:02,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230186653] [2019-11-23 22:55:02,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:55:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:55:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:55:02,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230186653] [2019-11-23 22:55:02,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321912400] [2019-11-23 22:55:02,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:55:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:55:02,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:55:02,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:55:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:55:02,254 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:55:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:55:02,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:55:02,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-23 22:55:02,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943536189] [2019-11-23 22:55:02,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:55:02,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:55:02,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:55:02,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:55:02,276 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2019-11-23 22:55:02,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:55:02,327 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2019-11-23 22:55:02,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:55:02,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-23 22:55:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:55:02,328 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:55:02,328 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 22:55:02,329 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:55:02,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 22:55:02,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 22:55:02,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:55:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-23 22:55:02,335 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-23 22:55:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:55:02,336 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-23 22:55:02,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:55:02,337 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-23 22:55:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:55:02,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:55:02,339 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:55:02,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:55:02,545 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:55:02,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:55:02,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1510942468, now seen corresponding path program 1 times [2019-11-23 22:55:02,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:55:02,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027077278] [2019-11-23 22:55:02,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:55:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:55:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:55:02,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027077278] [2019-11-23 22:55:02,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946740414] [2019-11-23 22:55:02,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:55:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:55:02,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:55:02,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:55:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:55:02,693 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:55:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:55:02,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:55:02,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-23 22:55:02,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518039226] [2019-11-23 22:55:02,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:55:02,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:55:02,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:55:02,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:55:02,712 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-23 22:55:02,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:55:02,732 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-23 22:55:02,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:55:02,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 22:55:02,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:55:02,734 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:55:02,734 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:55:02,735 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:55:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:55:02,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 22:55:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 22:55:02,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-23 22:55:02,740 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2019-11-23 22:55:02,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:55:02,741 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-23 22:55:02,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:55:02,741 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-23 22:55:02,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:55:02,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:55:02,742 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:55:02,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:55:02,946 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:55:02,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:55:02,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1316778556, now seen corresponding path program 1 times [2019-11-23 22:55:02,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:55:02,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222025576] [2019-11-23 22:55:02,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:55:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:55:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:55:03,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222025576] [2019-11-23 22:55:03,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949649217] [2019-11-23 22:55:03,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:55:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:55:03,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:55:03,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:55:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:55:03,125 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:55:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:55:03,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [907538632] [2019-11-23 22:55:03,176 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 22:55:03,177 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:55:03,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:55:03,192 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:55:03,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:55:16,080 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 179 [2019-11-23 22:55:29,264 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 225 [2019-11-23 22:55:38,287 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 249 [2019-11-23 22:55:56,169 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2019-11-23 22:56:17,420 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 321 [2019-11-23 22:56:19,617 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 326 [2019-11-23 22:56:22,228 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 333 [2019-11-23 22:56:22,339 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 330 [2019-11-23 22:56:24,788 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 332 [2019-11-23 22:56:27,467 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 339 [2019-11-23 22:56:30,148 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 341 [2019-11-23 22:56:30,286 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2019-11-23 22:56:30,392 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 344