/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_copy2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:03:00,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:03:00,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:03:00,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:03:00,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:03:00,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:03:00,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:03:00,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:03:00,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:03:00,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:03:00,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:03:00,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:03:00,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:03:00,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:03:00,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:03:00,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:03:00,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:03:00,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:03:00,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:03:00,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:03:00,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:03:00,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:03:00,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:03:00,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:03:00,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:03:00,783 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 23:03:00,797 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:03:00,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:03:00,799 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:03:00,799 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:03:00,799 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:03:00,799 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:03:00,799 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:03:00,800 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:03:00,800 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:03:00,800 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:03:00,800 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:03:00,800 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:03:00,801 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:03:00,801 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:03:00,801 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:03:00,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:03:00,802 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:03:00,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:03:00,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:03:00,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:03:00,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:03:00,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:03:00,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:03:00,803 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:03:00,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:03:00,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:03:00,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:03:00,804 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:03:00,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:03:00,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:03:00,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:03:00,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:03:00,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:03:00,805 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:03:00,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:03:00,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:03:00,806 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:03:00,806 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:03:01,083 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:03:01,102 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:03:01,107 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:03:01,108 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:03:01,109 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:03:01,109 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i [2019-11-23 23:03:01,183 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67f4e4eda/48d0e5589b8249f49ead2f3e83dc4aaf/FLAG51fd659a1 [2019-11-23 23:03:01,637 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:03:01,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i [2019-11-23 23:03:01,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67f4e4eda/48d0e5589b8249f49ead2f3e83dc4aaf/FLAG51fd659a1 [2019-11-23 23:03:02,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67f4e4eda/48d0e5589b8249f49ead2f3e83dc4aaf [2019-11-23 23:03:02,021 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:03:02,023 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:03:02,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:03:02,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:03:02,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:03:02,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@408dfa8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02, skipping insertion in model container [2019-11-23 23:03:02,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:03:02,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:03:02,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:03:02,220 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:03:02,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:03:02,280 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:03:02,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02 WrapperNode [2019-11-23 23:03:02,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:03:02,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:03:02,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:03:02,281 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:03:02,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:03:02,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:03:02,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:03:02,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:03:02,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (1/1) ... [2019-11-23 23:03:02,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:03:02,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:03:02,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:03:02,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:03:02,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (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 23:03:02,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:03:02,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:03:02,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:03:02,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:03:02,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:03:02,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:03:02,901 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:03:02,901 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 23:03:02,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:03:02 BoogieIcfgContainer [2019-11-23 23:03:02,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:03:02,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:03:02,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:03:02,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:03:02,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:03:02" (1/3) ... [2019-11-23 23:03:02,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad6d61c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:03:02, skipping insertion in model container [2019-11-23 23:03:02,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:03:02" (2/3) ... [2019-11-23 23:03:02,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad6d61c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:03:02, skipping insertion in model container [2019-11-23 23:03:02,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:03:02" (3/3) ... [2019-11-23 23:03:02,909 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-1.i [2019-11-23 23:03:02,917 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:03:02,923 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:03:02,934 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:03:02,956 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:03:02,956 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:03:02,956 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:03:02,957 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:03:02,957 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:03:02,957 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:03:02,957 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:03:02,957 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:03:02,968 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-23 23:03:02,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:03:02,974 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:03:02,975 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:03:02,975 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:03:02,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:03:02,981 INFO L82 PathProgramCache]: Analyzing trace with hash -652315547, now seen corresponding path program 1 times [2019-11-23 23:03:02,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:03:02,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223547051] [2019-11-23 23:03:02,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:03:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:03:03,134 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 23:03:03,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223547051] [2019-11-23 23:03:03,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:03:03,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:03:03,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176735113] [2019-11-23 23:03:03,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:03:03,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:03:03,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:03:03,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:03:03,162 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2019-11-23 23:03:03,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:03:03,196 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2019-11-23 23:03:03,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:03:03,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 23:03:03,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:03:03,208 INFO L225 Difference]: With dead ends: 19 [2019-11-23 23:03:03,209 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 23:03:03,212 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 23:03:03,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 23:03:03,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 23:03:03,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 23:03:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2019-11-23 23:03:03,242 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2019-11-23 23:03:03,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:03:03,243 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2019-11-23 23:03:03,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:03:03,244 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2019-11-23 23:03:03,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:03:03,244 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:03:03,245 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:03:03,245 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:03:03,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:03:03,245 INFO L82 PathProgramCache]: Analyzing trace with hash -611776766, now seen corresponding path program 1 times [2019-11-23 23:03:03,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:03:03,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940177498] [2019-11-23 23:03:03,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:03:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:03:03,330 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 23:03:03,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940177498] [2019-11-23 23:03:03,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:03:03,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:03:03,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378132043] [2019-11-23 23:03:03,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:03:03,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:03:03,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:03:03,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:03:03,339 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 3 states. [2019-11-23 23:03:03,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:03:03,359 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2019-11-23 23:03:03,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:03:03,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 23:03:03,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:03:03,360 INFO L225 Difference]: With dead ends: 18 [2019-11-23 23:03:03,360 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 23:03:03,361 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 23:03:03,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 23:03:03,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 23:03:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:03:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2019-11-23 23:03:03,365 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2019-11-23 23:03:03,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:03:03,366 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2019-11-23 23:03:03,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:03:03,366 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2019-11-23 23:03:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:03:03,367 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:03:03,367 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:03:03,367 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:03:03,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:03:03,368 INFO L82 PathProgramCache]: Analyzing trace with hash -688467851, now seen corresponding path program 1 times [2019-11-23 23:03:03,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:03:03,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117949143] [2019-11-23 23:03:03,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:03:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:03:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:03:03,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117949143] [2019-11-23 23:03:03,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247770497] [2019-11-23 23:03:03,446 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 23:03:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:03:03,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:03:03,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:03:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:03:03,566 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:03:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:03:03,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [77034995] [2019-11-23 23:03:03,616 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-23 23:03:03,616 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:03:03,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:03:03,633 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:03:03,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:03:05,392 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2019-11-23 23:03:05,533 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 155 [2019-11-23 23:03:05,658 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 155 [2019-11-23 23:03:06,848 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 174 [2019-11-23 23:03:06,970 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 174 [2019-11-23 23:03:07,153 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2019-11-23 23:03:07,271 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 182 [2019-11-23 23:03:09,495 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 202 [2019-11-23 23:03:11,632 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 207 [2019-11-23 23:03:13,948 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2019-11-23 23:03:14,124 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 197 [2019-11-23 23:03:16,346 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 213 [2019-11-23 23:03:16,501 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2019-11-23 23:03:16,659 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 202 [2019-11-23 23:03:18,915 WARN L192 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 216 [2019-11-23 23:03:19,144 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2019-11-23 23:03:19,273 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 207 [2019-11-23 23:03:21,514 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-23 23:03:26,597 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 229 [2019-11-23 23:03:29,201 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 232 [2019-11-23 23:03:31,903 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 236 [2019-11-23 23:03:34,985 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 241 [2019-11-23 23:03:38,000 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 246 [2019-11-23 23:03:40,843 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 248 [2019-11-23 23:03:43,897 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 248 [2019-11-23 23:03:47,060 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 253 [2019-11-23 23:03:50,269 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 256 [2019-11-23 23:03:50,424 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 241 [2019-11-23 23:03:50,605 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 242 [2019-11-23 23:03:53,745 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 259 [2019-11-23 23:03:57,655 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 267 [2019-11-23 23:04:01,286 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 269 [2019-11-23 23:04:01,501 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 256 [2019-11-23 23:04:05,071 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 272 [2019-11-23 23:04:09,019 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 276 [2019-11-23 23:04:09,227 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 263 [2019-11-23 23:04:09,381 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 264 [2019-11-23 23:04:12,982 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 279 [2019-11-23 23:04:13,207 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 265 [2019-11-23 23:04:17,631 WARN L192 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 286 [2019-11-23 23:04:17,822 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 270 [2019-11-23 23:04:17,989 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 270 [2019-11-23 23:04:21,978 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 289 [2019-11-23 23:04:26,470 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 293 [2019-11-23 23:04:26,688 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 275 [2019-11-23 23:04:26,840 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 275 [2019-11-23 23:04:31,313 WARN L192 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 299 [2019-11-23 23:04:31,544 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 280 [2019-11-23 23:04:35,955 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 303