/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/sanfoundry_10_ground.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:01:14,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:01:14,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:01:14,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:01:14,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:01:14,454 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:01:14,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:01:14,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:01:14,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:01:14,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:01:14,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:01:14,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:01:14,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:01:14,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:01:14,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:01:14,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:01:14,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:01:14,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:01:14,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:01:14,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:01:14,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:01:14,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:01:14,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:01:14,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:01:14,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:01:14,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:01:14,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:01:14,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:01:14,518 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 23:01:14,549 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:01:14,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:01:14,551 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:01:14,551 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:01:14,551 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:01:14,552 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:01:14,552 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:01:14,552 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:01:14,552 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:01:14,552 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:01:14,554 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:01:14,554 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:01:14,554 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:01:14,555 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:01:14,555 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:01:14,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:01:14,556 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:01:14,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:01:14,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:01:14,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:01:14,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:01:14,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:01:14,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:01:14,558 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:01:14,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:01:14,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:01:14,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:01:14,558 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:01:14,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:01:14,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:01:14,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:01:14,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:01:14,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:01:14,561 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:01:14,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:01:14,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:01:14,562 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:01:14,562 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:01:14,855 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:01:14,875 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:01:14,878 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:01:14,880 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:01:14,880 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:01:14,881 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2019-11-23 23:01:14,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/288f44cc6/4b8c10bccfbc47e6974396c3b52e1eb9/FLAG8d0d5c946 [2019-11-23 23:01:15,365 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:01:15,366 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2019-11-23 23:01:15,373 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/288f44cc6/4b8c10bccfbc47e6974396c3b52e1eb9/FLAG8d0d5c946 [2019-11-23 23:01:15,764 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/288f44cc6/4b8c10bccfbc47e6974396c3b52e1eb9 [2019-11-23 23:01:15,777 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:01:15,779 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:01:15,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:01:15,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:01:15,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:01:15,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:01:15" (1/1) ... [2019-11-23 23:01:15,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab7ede9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:15, skipping insertion in model container [2019-11-23 23:01:15,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:01:15" (1/1) ... [2019-11-23 23:01:15,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:01:15,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:01:16,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:01:16,016 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:01:16,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:01:16,056 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:01:16,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:16 WrapperNode [2019-11-23 23:01:16,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:01:16,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:01:16,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:01:16,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:01:16,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:16" (1/1) ... [2019-11-23 23:01:16,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:16" (1/1) ... [2019-11-23 23:01:16,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:01:16,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:01:16,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:01:16,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:01:16,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:16" (1/1) ... [2019-11-23 23:01:16,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:16" (1/1) ... [2019-11-23 23:01:16,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:16" (1/1) ... [2019-11-23 23:01:16,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:16" (1/1) ... [2019-11-23 23:01:16,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:16" (1/1) ... [2019-11-23 23:01:16,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:16" (1/1) ... [2019-11-23 23:01:16,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:16" (1/1) ... [2019-11-23 23:01:16,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:01:16,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:01:16,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:01:16,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:01:16,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:16" (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 23:01:16,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:01:16,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:01:16,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:01:16,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:01:16,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:01:16,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:01:16,675 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:01:16,676 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 23:01:16,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:01:16 BoogieIcfgContainer [2019-11-23 23:01:16,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:01:16,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:01:16,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:01:16,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:01:16,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:01:15" (1/3) ... [2019-11-23 23:01:16,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f552ee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:01:16, skipping insertion in model container [2019-11-23 23:01:16,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:01:16" (2/3) ... [2019-11-23 23:01:16,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f552ee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:01:16, skipping insertion in model container [2019-11-23 23:01:16,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:01:16" (3/3) ... [2019-11-23 23:01:16,685 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2019-11-23 23:01:16,695 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:01:16,705 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:01:16,718 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:01:16,741 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:01:16,741 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:01:16,741 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:01:16,741 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:01:16,741 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:01:16,742 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:01:16,742 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:01:16,742 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:01:16,754 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-11-23 23:01:16,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:01:16,760 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:16,761 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:16,762 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:16,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:16,768 INFO L82 PathProgramCache]: Analyzing trace with hash -11476790, now seen corresponding path program 1 times [2019-11-23 23:01:16,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:16,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546678602] [2019-11-23 23:01:16,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:16,920 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 23:01:16,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546678602] [2019-11-23 23:01:16,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:01:16,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:01:16,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472811245] [2019-11-23 23:01:16,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:01:16,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:01:16,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:01:16,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:01:16,946 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2019-11-23 23:01:17,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:01:17,024 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2019-11-23 23:01:17,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:01:17,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 23:01:17,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:01:17,039 INFO L225 Difference]: With dead ends: 25 [2019-11-23 23:01:17,040 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 23:01:17,046 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 23:01:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 23:01:17,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 23:01:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:01:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2019-11-23 23:01:17,098 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2019-11-23 23:01:17,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:01:17,099 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-23 23:01:17,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:01:17,100 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2019-11-23 23:01:17,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 23:01:17,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:17,101 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:17,101 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:17,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1839598083, now seen corresponding path program 1 times [2019-11-23 23:01:17,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:17,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412991374] [2019-11-23 23:01:17,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:17,187 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 23:01:17,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412991374] [2019-11-23 23:01:17,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:01:17,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:01:17,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820893730] [2019-11-23 23:01:17,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:01:17,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:01:17,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:01:17,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:01:17,192 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 3 states. [2019-11-23 23:01:17,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:01:17,220 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2019-11-23 23:01:17,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:01:17,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 23:01:17,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:01:17,222 INFO L225 Difference]: With dead ends: 22 [2019-11-23 23:01:17,223 INFO L226 Difference]: Without dead ends: 13 [2019-11-23 23:01:17,224 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 23:01:17,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-23 23:01:17,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-23 23:01:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 23:01:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2019-11-23 23:01:17,230 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2019-11-23 23:01:17,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:01:17,230 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2019-11-23 23:01:17,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:01:17,230 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2019-11-23 23:01:17,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 23:01:17,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:01:17,232 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:01:17,233 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:01:17,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:01:17,234 INFO L82 PathProgramCache]: Analyzing trace with hash 695415715, now seen corresponding path program 1 times [2019-11-23 23:01:17,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:01:17,235 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483196563] [2019-11-23 23:01:17,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:01:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:17,336 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 23:01:17,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483196563] [2019-11-23 23:01:17,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930742936] [2019-11-23 23:01:17,337 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 23:01:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:01:17,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 23:01:17,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:01:17,450 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 23:01:17,451 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:01:17,474 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 23:01:17,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2131491194] [2019-11-23 23:01:17,499 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-23 23:01:17,500 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:01:17,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:01:17,513 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:01:17,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:01:19,929 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 141 [2019-11-23 23:01:30,011 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 198 [2019-11-23 23:01:54,167 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 265 [2019-11-23 23:02:07,015 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 289 [2019-11-23 23:02:15,798 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 305 [2019-11-23 23:02:20,044 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 313 [2019-11-23 23:02:22,459 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 316 [2019-11-23 23:02:24,772 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2019-11-23 23:02:24,897 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 320 [2019-11-23 23:02:27,547 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 326 [2019-11-23 23:02:27,716 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 320 [2019-11-23 23:02:27,965 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 319 [2019-11-23 23:02:30,567 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2019-11-23 23:02:30,692 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 327 [2019-11-23 23:02:33,108 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 331 [2019-11-23 23:02:33,225 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 331 [2019-11-23 23:02:36,534 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2019-11-23 23:02:36,661 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 335 [2019-11-23 23:02:39,218 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2019-11-23 23:02:39,366 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 339 [2019-11-23 23:02:41,850 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 345 [2019-11-23 23:02:41,996 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 341 [2019-11-23 23:02:42,242 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 341 [2019-11-23 23:02:42,375 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2019-11-23 23:02:42,486 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 344 [2019-11-23 23:02:45,045 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-23 23:02:45,179 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 348 [2019-11-23 23:02:47,828 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 352 [2019-11-23 23:02:47,955 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 352