/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/reducercommutativity/sum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:44:07,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:44:07,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:44:07,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:44:07,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:44:07,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:44:07,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:44:07,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:44:07,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:44:07,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:44:07,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:44:07,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:44:07,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:44:07,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:44:07,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:44:07,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:44:07,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:44:07,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:44:07,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:44:07,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:44:07,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:44:07,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:44:07,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:44:07,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:44:07,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:44:07,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:44:07,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:44:07,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:44:07,791 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 [2019-11-24 05:44:07,811 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:44:07,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:44:07,812 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:44:07,813 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:44:07,813 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:44:07,813 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:44:07,813 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:44:07,814 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:44:07,814 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:44:07,814 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:44:07,815 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:44:07,815 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:44:07,816 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:44:07,816 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:44:07,816 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:44:07,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:44:07,818 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:44:07,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:44:07,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:44:07,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:44:07,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:44:07,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:44:07,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:44:07,819 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:44:07,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:44:07,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:44:07,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:44:07,820 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:44:07,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:44:07,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:44:07,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:44:07,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:44:07,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:44:07,823 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:44:07,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:44:07,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:44:07,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:44:07,824 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:44:08,137 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:44:08,160 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:44:08,163 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:44:08,165 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:44:08,165 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:44:08,166 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum.i [2019-11-24 05:44:08,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d88b6b29/63a655b8362a4a24baf4ce9cfc33c047/FLAGbf9b79124 [2019-11-24 05:44:08,650 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:44:08,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum.i [2019-11-24 05:44:08,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d88b6b29/63a655b8362a4a24baf4ce9cfc33c047/FLAGbf9b79124 [2019-11-24 05:44:09,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d88b6b29/63a655b8362a4a24baf4ce9cfc33c047 [2019-11-24 05:44:09,066 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:44:09,068 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:44:09,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:44:09,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:44:09,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:44:09,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e90e1fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09, skipping insertion in model container [2019-11-24 05:44:09,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:44:09,100 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:44:09,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:44:09,279 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:44:09,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:44:09,316 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:44:09,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09 WrapperNode [2019-11-24 05:44:09,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:44:09,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:44:09,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:44:09,318 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:44:09,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,418 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:44:09,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:44:09,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:44:09,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:44:09,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (1/1) ... [2019-11-24 05:44:09,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:44:09,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:44:09,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:44:09,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:44:09,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (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 [2019-11-24 05:44:09,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 05:44:09,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:44:09,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:44:09,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 05:44:09,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:44:09,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 05:44:10,030 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:44:10,031 INFO L284 CfgBuilder]: Removed 14 assume(true) statements. [2019-11-24 05:44:10,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:44:10 BoogieIcfgContainer [2019-11-24 05:44:10,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:44:10,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:44:10,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:44:10,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:44:10,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:44:09" (1/3) ... [2019-11-24 05:44:10,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef87403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:44:10, skipping insertion in model container [2019-11-24 05:44:10,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:44:09" (2/3) ... [2019-11-24 05:44:10,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef87403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:44:10, skipping insertion in model container [2019-11-24 05:44:10,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:44:10" (3/3) ... [2019-11-24 05:44:10,039 INFO L109 eAbstractionObserver]: Analyzing ICFG sum.i [2019-11-24 05:44:10,046 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:44:10,053 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 05:44:10,064 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 05:44:10,083 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:44:10,083 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:44:10,083 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:44:10,083 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:44:10,083 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:44:10,083 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:44:10,083 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:44:10,084 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:44:10,096 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-24 05:44:10,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:44:10,102 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:44:10,103 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:44:10,104 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:44:10,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:44:10,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1573662395, now seen corresponding path program 1 times [2019-11-24 05:44:10,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:44:10,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20882235] [2019-11-24 05:44:10,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:44:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:44:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:44:10,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20882235] [2019-11-24 05:44:10,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:44:10,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:44:10,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428826401] [2019-11-24 05:44:10,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:44:10,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:44:10,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:44:10,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:44:10,356 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2019-11-24 05:44:10,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:44:10,423 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2019-11-24 05:44:10,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:44:10,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:44:10,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:44:10,437 INFO L225 Difference]: With dead ends: 22 [2019-11-24 05:44:10,438 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 05:44:10,441 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 [2019-11-24 05:44:10,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 05:44:10,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-24 05:44:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-24 05:44:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2019-11-24 05:44:10,481 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 8 [2019-11-24 05:44:10,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:44:10,482 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2019-11-24 05:44:10,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:44:10,482 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2019-11-24 05:44:10,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 05:44:10,483 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:44:10,483 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:44:10,483 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:44:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:44:10,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1342629747, now seen corresponding path program 1 times [2019-11-24 05:44:10,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:44:10,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622799644] [2019-11-24 05:44:10,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:44:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:44:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 05:44:10,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622799644] [2019-11-24 05:44:10,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:44:10,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 05:44:10,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414663366] [2019-11-24 05:44:10,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:44:10,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:44:10,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:44:10,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 05:44:10,602 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 4 states. [2019-11-24 05:44:10,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:44:10,649 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2019-11-24 05:44:10,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:44:10,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-24 05:44:10,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:44:10,651 INFO L225 Difference]: With dead ends: 17 [2019-11-24 05:44:10,651 INFO L226 Difference]: Without dead ends: 12 [2019-11-24 05:44:10,652 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 05:44:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-24 05:44:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-24 05:44:10,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-24 05:44:10,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2019-11-24 05:44:10,656 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 9 [2019-11-24 05:44:10,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:44:10,656 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2019-11-24 05:44:10,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:44:10,657 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2019-11-24 05:44:10,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-24 05:44:10,657 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:44:10,658 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:44:10,658 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:44:10,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:44:10,658 INFO L82 PathProgramCache]: Analyzing trace with hash 856396691, now seen corresponding path program 1 times [2019-11-24 05:44:10,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:44:10,659 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664558235] [2019-11-24 05:44:10,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:44:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:44:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 05:44:10,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664558235] [2019-11-24 05:44:10,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:44:10,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 05:44:10,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739664979] [2019-11-24 05:44:10,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:44:10,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:44:10,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:44:10,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 05:44:10,760 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand 4 states. [2019-11-24 05:44:10,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:44:10,811 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2019-11-24 05:44:10,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:44:10,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-24 05:44:10,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:44:10,812 INFO L225 Difference]: With dead ends: 18 [2019-11-24 05:44:10,813 INFO L226 Difference]: Without dead ends: 13 [2019-11-24 05:44:10,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 05:44:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-24 05:44:10,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-24 05:44:10,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-24 05:44:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2019-11-24 05:44:10,821 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 11 [2019-11-24 05:44:10,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:44:10,821 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2019-11-24 05:44:10,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:44:10,822 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2019-11-24 05:44:10,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 05:44:10,823 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:44:10,823 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:44:10,823 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:44:10,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:44:10,824 INFO L82 PathProgramCache]: Analyzing trace with hash 644136275, now seen corresponding path program 1 times [2019-11-24 05:44:10,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:44:10,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896694257] [2019-11-24 05:44:10,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:44:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:44:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 05:44:10,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896694257] [2019-11-24 05:44:10,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750921896] [2019-11-24 05:44:10,911 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 [2019-11-24 05:44:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:44:10,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 05:44:10,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:44:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 05:44:11,051 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:44:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 05:44:11,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [942142787] [2019-11-24 05:44:11,155 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 05:44:11,156 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:44:11,163 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:44:11,174 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:44:11,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:44:12,058 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 165 [2019-11-24 05:44:12,212 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 165 [2019-11-24 05:44:12,370 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 199 [2019-11-24 05:44:12,526 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 191 [2019-11-24 05:44:12,705 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 238 [2019-11-24 05:44:12,984 WARN L192 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 229 [2019-11-24 05:44:13,287 WARN L192 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 289 [2019-11-24 05:44:13,686 WARN L192 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 290 [2019-11-24 05:44:14,031 WARN L192 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 352 [2019-11-24 05:44:14,366 WARN L192 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 344 [2019-11-24 05:44:14,857 WARN L192 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 437 [2019-11-24 05:44:15,340 WARN L192 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 429 [2019-11-24 05:44:15,895 WARN L192 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 526 [2019-11-24 05:44:16,541 WARN L192 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 512 [2019-11-24 05:44:17,225 WARN L192 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 645 DAG size of output: 644 [2019-11-24 05:44:18,097 WARN L192 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 645 DAG size of output: 644 [2019-11-24 05:44:19,189 WARN L192 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 822 [2019-11-24 05:44:20,444 WARN L192 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 823 DAG size of output: 822 [2019-11-24 05:44:22,038 WARN L192 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 1043 DAG size of output: 1042 [2019-11-24 05:44:23,959 WARN L192 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 1038 DAG size of output: 1007 [2019-11-24 05:44:25,666 WARN L192 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 983 DAG size of output: 983 [2019-11-24 05:44:27,309 WARN L192 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 984 DAG size of output: 984 [2019-11-24 05:44:29,827 WARN L192 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 1237 DAG size of output: 1236 [2019-11-24 05:44:32,603 WARN L192 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 1237 DAG size of output: 1237 [2019-11-24 05:44:36,902 WARN L192 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 1596 DAG size of output: 1594 [2019-11-24 05:44:41,695 WARN L192 SmtUtils]: Spent 4.66 s on a formula simplification. DAG size of input: 1588 DAG size of output: 1582 [2019-11-24 05:44:46,354 WARN L192 SmtUtils]: Spent 4.39 s on a formula simplification that was a NOOP. DAG size: 1580 [2019-11-24 05:44:50,568 WARN L192 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 1581 DAG size of output: 1581 [2019-11-24 05:44:57,461 WARN L192 SmtUtils]: Spent 6.80 s on a formula simplification. DAG size of input: 1945 DAG size of output: 1945 [2019-11-24 05:45:04,475 WARN L192 SmtUtils]: Spent 6.87 s on a formula simplification. DAG size of input: 1946 DAG size of output: 1944 [2019-11-24 05:45:13,856 WARN L192 SmtUtils]: Spent 9.25 s on a formula simplification. DAG size of input: 2360 DAG size of output: 2359 [2019-11-24 05:45:23,828 WARN L192 SmtUtils]: Spent 9.80 s on a formula simplification. DAG size of input: 2353 DAG size of output: 2351 [2019-11-24 05:45:40,159 WARN L192 SmtUtils]: Spent 16.18 s on a formula simplification. DAG size of input: 2934 DAG size of output: 2932