/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-examples/standard_init2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:07:51,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:07:51,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:07:51,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:07:51,703 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:07:51,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:07:51,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:07:51,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:07:51,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:07:51,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:07:51,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:07:51,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:07:51,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:07:51,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:07:51,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:07:51,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:07:51,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:07:51,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:07:51,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:07:51,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:07:51,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:07:51,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:07:51,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:07:51,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:07:51,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:07:51,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:07:51,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:07:51,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:07:51,749 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 23:07:51,772 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:07:51,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:07:51,774 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:07:51,774 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:07:51,774 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:07:51,775 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:07:51,775 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:07:51,775 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:07:51,775 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:07:51,775 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:07:51,776 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:07:51,777 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:07:51,777 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:07:51,777 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:07:51,778 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:07:51,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:07:51,779 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:07:51,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:07:51,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:07:51,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:07:51,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:07:51,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:07:51,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:07:51,781 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:07:51,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:07:51,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:07:51,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:07:51,782 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:07:51,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:07:51,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:07:51,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:07:51,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:07:51,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:07:51,784 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:07:51,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:07:51,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:07:51,785 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:07:51,785 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:07:52,067 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:07:52,081 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:07:52,084 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:07:52,086 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:07:52,086 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:07:52,087 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init2_ground-2.i [2019-11-23 23:07:52,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eaea05a9/eb1dcd10a57c42a18bbabb1c8705060e/FLAGc776de7d3 [2019-11-23 23:07:52,623 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:07:52,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init2_ground-2.i [2019-11-23 23:07:52,629 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eaea05a9/eb1dcd10a57c42a18bbabb1c8705060e/FLAGc776de7d3 [2019-11-23 23:07:53,014 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eaea05a9/eb1dcd10a57c42a18bbabb1c8705060e [2019-11-23 23:07:53,023 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:07:53,025 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:07:53,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:07:53,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:07:53,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:07:53,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:07:53" (1/1) ... [2019-11-23 23:07:53,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f047c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:53, skipping insertion in model container [2019-11-23 23:07:53,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:07:53" (1/1) ... [2019-11-23 23:07:53,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:07:53,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:07:53,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:07:53,286 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:07:53,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:07:53,336 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:07:53,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:53 WrapperNode [2019-11-23 23:07:53,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:07:53,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:07:53,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:07:53,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:07:53,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:53" (1/1) ... [2019-11-23 23:07:53,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:53" (1/1) ... [2019-11-23 23:07:53,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:07:53,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:07:53,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:07:53,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:07:53,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:53" (1/1) ... [2019-11-23 23:07:53,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:53" (1/1) ... [2019-11-23 23:07:53,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:53" (1/1) ... [2019-11-23 23:07:53,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:53" (1/1) ... [2019-11-23 23:07:53,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:53" (1/1) ... [2019-11-23 23:07:53,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:53" (1/1) ... [2019-11-23 23:07:53,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:53" (1/1) ... [2019-11-23 23:07:53,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:07:53,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:07:53,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:07:53,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:07:53,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:53" (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 23:07:53,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:07:53,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:07:53,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:07:53,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:07:53,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:07:53,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:07:53,911 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:07:53,911 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:07:53,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:07:53 BoogieIcfgContainer [2019-11-23 23:07:53,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:07:53,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:07:53,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:07:53,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:07:53,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:07:53" (1/3) ... [2019-11-23 23:07:53,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33dab133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:07:53, skipping insertion in model container [2019-11-23 23:07:53,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:53" (2/3) ... [2019-11-23 23:07:53,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33dab133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:07:53, skipping insertion in model container [2019-11-23 23:07:53,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:07:53" (3/3) ... [2019-11-23 23:07:53,921 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init2_ground-2.i [2019-11-23 23:07:53,929 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:07:53,935 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:07:53,947 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:07:53,968 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:07:53,968 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:07:53,968 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:07:53,968 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:07:53,968 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:07:53,968 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:07:53,969 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:07:53,969 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:07:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-23 23:07:53,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:07:53,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:07:53,988 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:07:53,988 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:07:53,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:07:53,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1742289615, now seen corresponding path program 1 times [2019-11-23 23:07:54,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:07:54,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288860931] [2019-11-23 23:07:54,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:07:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:07:54,147 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 23:07:54,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288860931] [2019-11-23 23:07:54,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:07:54,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:07:54,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648387804] [2019-11-23 23:07:54,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:07:54,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:07:54,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:07:54,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:07:54,170 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-23 23:07:54,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:07:54,207 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2019-11-23 23:07:54,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:07:54,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:07:54,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:07:54,219 INFO L225 Difference]: With dead ends: 18 [2019-11-23 23:07:54,219 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 23:07:54,223 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 23:07:54,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 23:07:54,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 23:07:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 23:07:54,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2019-11-23 23:07:54,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2019-11-23 23:07:54,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:07:54,259 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2019-11-23 23:07:54,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:07:54,259 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2019-11-23 23:07:54,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:07:54,260 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:07:54,260 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:07:54,260 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:07:54,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:07:54,261 INFO L82 PathProgramCache]: Analyzing trace with hash 63254386, now seen corresponding path program 1 times [2019-11-23 23:07:54,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:07:54,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280260629] [2019-11-23 23:07:54,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:07:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:07:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:07:54,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280260629] [2019-11-23 23:07:54,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521518] [2019-11-23 23:07:54,318 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 23:07:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:07:54,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:07:54,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:07:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:07:54,398 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:07:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:07:54,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [237343989] [2019-11-23 23:07:54,443 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:07:54,444 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:07:54,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:07:54,456 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:07:54,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:08:26,561 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 259 [2019-11-23 23:08:52,997 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2019-11-23 23:08:53,245 WARN L192 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 318 [2019-11-23 23:08:56,090 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 334 [2019-11-23 23:08:58,645 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2019-11-23 23:08:58,752 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 337 [2019-11-23 23:08:58,971 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 339 [2019-11-23 23:09:02,483 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 349 [2019-11-23 23:09:05,592 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 356 [2019-11-23 23:09:08,369 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 360 [2019-11-23 23:09:11,201 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-11-23 23:09:11,322 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 363 [2019-11-23 23:09:14,325 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 366 [2019-11-23 23:09:16,990 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 372 [2019-11-23 23:09:17,119 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 369 [2019-11-23 23:09:17,345 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 372 [2019-11-23 23:09:20,324 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 376 [2019-11-23 23:09:20,468 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 376 [2019-11-23 23:09:23,289 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 382 [2019-11-23 23:09:23,418 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 378 [2019-11-23 23:09:23,547 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 380 [2019-11-23 23:09:23,664 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 381 [2019-11-23 23:09:26,640 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 385 [2019-11-23 23:09:26,774 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 384 [2019-11-23 23:09:26,912 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 386