/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/xor5.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:56:32,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:56:32,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:56:32,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:56:32,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:56:32,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:56:32,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:56:32,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:56:32,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:56:32,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:56:32,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:56:32,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:56:32,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:56:32,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:56:32,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:56:32,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:56:32,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:56:32,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:56:32,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:56:32,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:56:32,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:56:32,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:56:32,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:56:32,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:56:32,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:56:32,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:56:32,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:56:32,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:56:32,107 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 22:56:32,122 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:56:32,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:56:32,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:56:32,123 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:56:32,124 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:56:32,124 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:56:32,124 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:56:32,124 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:56:32,124 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:56:32,125 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:56:32,125 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:56:32,125 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:56:32,125 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:56:32,125 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:56:32,126 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:56:32,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:56:32,127 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:56:32,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:56:32,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:56:32,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:56:32,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:56:32,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:56:32,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:56:32,128 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:56:32,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:56:32,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:56:32,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:56:32,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:56:32,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:56:32,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:56:32,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:56:32,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:56:32,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:56:32,130 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:56:32,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:56:32,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:56:32,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:56:32,131 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:56:32,420 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:56:32,442 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:56:32,445 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:56:32,447 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:56:32,447 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:56:32,448 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor5.i [2019-11-23 22:56:32,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6ee8c47f/d33f501c7fb7487e8bf897029ca60ef8/FLAG42e58efff [2019-11-23 22:56:32,998 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:56:32,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor5.i [2019-11-23 22:56:33,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6ee8c47f/d33f501c7fb7487e8bf897029ca60ef8/FLAG42e58efff [2019-11-23 22:56:33,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6ee8c47f/d33f501c7fb7487e8bf897029ca60ef8 [2019-11-23 22:56:33,367 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:56:33,369 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:56:33,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:56:33,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:56:33,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:56:33,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:56:33" (1/1) ... [2019-11-23 22:56:33,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ef44e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:33, skipping insertion in model container [2019-11-23 22:56:33,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:56:33" (1/1) ... [2019-11-23 22:56:33,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:56:33,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:56:33,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:56:33,657 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:56:33,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:56:33,778 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:56:33,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:33 WrapperNode [2019-11-23 22:56:33,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:56:33,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:56:33,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:56:33,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:56:33,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:33" (1/1) ... [2019-11-23 22:56:33,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:33" (1/1) ... [2019-11-23 22:56:33,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:56:33,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:56:33,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:56:33,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:56:33,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:33" (1/1) ... [2019-11-23 22:56:33,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:33" (1/1) ... [2019-11-23 22:56:33,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:33" (1/1) ... [2019-11-23 22:56:33,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:33" (1/1) ... [2019-11-23 22:56:33,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:33" (1/1) ... [2019-11-23 22:56:33,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:33" (1/1) ... [2019-11-23 22:56:33,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:33" (1/1) ... [2019-11-23 22:56:33,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:56:33,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:56:33,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:56:33,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:56:33,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:33" (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 22:56:33,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:56:33,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:56:33,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:56:33,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:56:33,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:56:33,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:56:34,467 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:56:34,467 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:56:34,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:56:34 BoogieIcfgContainer [2019-11-23 22:56:34,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:56:34,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:56:34,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:56:34,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:56:34,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:56:33" (1/3) ... [2019-11-23 22:56:34,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e51fc3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:56:34, skipping insertion in model container [2019-11-23 22:56:34,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:33" (2/3) ... [2019-11-23 22:56:34,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e51fc3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:56:34, skipping insertion in model container [2019-11-23 22:56:34,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:56:34" (3/3) ... [2019-11-23 22:56:34,477 INFO L109 eAbstractionObserver]: Analyzing ICFG xor5.i [2019-11-23 22:56:34,486 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:56:34,493 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:56:34,504 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:56:34,527 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:56:34,527 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:56:34,528 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:56:34,528 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:56:34,528 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:56:34,528 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:56:34,529 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:56:34,529 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:56:34,545 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-11-23 22:56:34,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:56:34,552 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:34,553 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:34,553 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:34,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:34,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1047258251, now seen corresponding path program 1 times [2019-11-23 22:56:34,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:34,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600880542] [2019-11-23 22:56:34,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:34,769 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 22:56:34,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600880542] [2019-11-23 22:56:34,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:56:34,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:56:34,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237677455] [2019-11-23 22:56:34,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:56:34,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:56:34,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:56:34,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:56:34,795 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2019-11-23 22:56:34,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:56:34,853 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2019-11-23 22:56:34,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:56:34,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 22:56:34,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:56:34,865 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:56:34,865 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 22:56:34,869 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 22:56:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 22:56:34,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 22:56:34,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 22:56:34,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2019-11-23 22:56:34,904 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 9 [2019-11-23 22:56:34,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:56:34,904 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2019-11-23 22:56:34,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:56:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2019-11-23 22:56:34,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:56:34,905 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:34,905 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:34,906 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:34,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:34,906 INFO L82 PathProgramCache]: Analyzing trace with hash -493215443, now seen corresponding path program 1 times [2019-11-23 22:56:34,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:34,907 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661976733] [2019-11-23 22:56:34,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:34,994 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 22:56:34,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661976733] [2019-11-23 22:56:34,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:56:34,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:56:34,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896694257] [2019-11-23 22:56:34,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:56:34,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:56:34,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:56:34,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:56:34,999 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand 4 states. [2019-11-23 22:56:35,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:56:35,052 INFO L93 Difference]: Finished difference Result 20 states and 29 transitions. [2019-11-23 22:56:35,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:56:35,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-23 22:56:35,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:56:35,053 INFO L225 Difference]: With dead ends: 20 [2019-11-23 22:56:35,053 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 22:56:35,054 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:56:35,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 22:56:35,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 22:56:35,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 22:56:35,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2019-11-23 22:56:35,059 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 10 [2019-11-23 22:56:35,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:56:35,059 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2019-11-23 22:56:35,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:56:35,060 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2019-11-23 22:56:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:56:35,060 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:35,061 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:35,061 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:35,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:35,061 INFO L82 PathProgramCache]: Analyzing trace with hash 33156354, now seen corresponding path program 1 times [2019-11-23 22:56:35,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:35,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530365888] [2019-11-23 22:56:35,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:56:35,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530365888] [2019-11-23 22:56:35,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:56:35,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:56:35,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124950069] [2019-11-23 22:56:35,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:56:35,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:56:35,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:56:35,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:56:35,175 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 4 states. [2019-11-23 22:56:35,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:56:35,239 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2019-11-23 22:56:35,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:56:35,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-23 22:56:35,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:56:35,241 INFO L225 Difference]: With dead ends: 20 [2019-11-23 22:56:35,241 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 22:56:35,242 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:56:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 22:56:35,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 22:56:35,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:56:35,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2019-11-23 22:56:35,247 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 13 [2019-11-23 22:56:35,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:56:35,248 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2019-11-23 22:56:35,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:56:35,248 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2019-11-23 22:56:35,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:56:35,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:35,249 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:35,249 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:35,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:35,250 INFO L82 PathProgramCache]: Analyzing trace with hash 523337404, now seen corresponding path program 1 times [2019-11-23 22:56:35,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:35,251 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282644653] [2019-11-23 22:56:35,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:56:35,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282644653] [2019-11-23 22:56:35,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145411369] [2019-11-23 22:56:35,306 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 22:56:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:35,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:56:35,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:56:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:56:35,482 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:56:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:56:35,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [844119622] [2019-11-23 22:56:35,529 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-23 22:56:35,529 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:56:35,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:56:35,542 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:56:35,543 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:56:49,732 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 192 [2019-11-23 22:57:05,186 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2019-11-23 22:57:05,358 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 254 [2019-11-23 22:57:14,145 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 276 [2019-11-23 22:57:14,277 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 277 [2019-11-23 22:57:32,807 WARN L192 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 314 [2019-11-23 22:57:32,930 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 308 [2019-11-23 22:57:41,987 WARN L192 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 330 [2019-11-23 22:57:42,207 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 326 [2019-11-23 22:57:44,581 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 328 [2019-11-23 22:57:45,256 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 334 [2019-11-23 22:57:48,093 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 344 [2019-11-23 22:57:48,213 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 339 [2019-11-23 22:57:50,738 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2019-11-23 22:57:50,852 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 342 [2019-11-23 22:57:53,277 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 348 [2019-11-23 22:57:53,387 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 345 [2019-11-23 22:57:56,156 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2019-11-23 22:57:56,274 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 349 [2019-11-23 22:57:58,788 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 356 [2019-11-23 22:57:58,912 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 351 [2019-11-23 22:57:59,141 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 353 [2019-11-23 22:57:59,387 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 357 [2019-11-23 22:58:02,082 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2019-11-23 22:58:02,230 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 362