/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_m3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:59:40,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:59:40,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:59:40,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:59:40,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:59:40,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:59:40,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:59:40,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:59:40,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:59:40,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:59:40,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:59:40,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:59:40,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:59:40,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:59:40,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:59:40,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:59:40,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:59:40,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:59:40,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:59:40,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:59:40,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:59:40,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:59:40,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:59:40,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:59:40,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:59:40,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:59:40,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:59:40,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:59:40,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-23 22:59:40,230 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:59:40,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:59:40,231 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:59:40,231 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:59:40,231 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:59:40,232 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:59:40,232 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:59:40,232 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:59:40,232 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:59:40,232 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:59:40,232 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:59:40,233 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:59:40,233 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:59:40,233 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:59:40,233 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:59:40,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:59:40,234 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:59:40,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:59:40,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:59:40,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:59:40,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:59:40,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:59:40,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:59:40,235 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:59:40,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:59:40,236 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:59:40,236 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:59:40,236 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:59:40,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:59:40,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:59:40,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:59:40,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:59:40,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:59:40,237 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:59:40,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:59:40,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:59:40,238 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:59:40,238 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:59:40,528 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:59:40,553 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:59:40,556 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:59:40,558 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:59:40,558 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:59:40,559 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m3.c [2019-11-23 22:59:40,629 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afc6f7d47/e0d7cbf3e4ef40a39317921a48b7b43f/FLAGaa7eede80 [2019-11-23 22:59:41,049 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:59:41,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m3.c [2019-11-23 22:59:41,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afc6f7d47/e0d7cbf3e4ef40a39317921a48b7b43f/FLAGaa7eede80 [2019-11-23 22:59:41,450 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afc6f7d47/e0d7cbf3e4ef40a39317921a48b7b43f [2019-11-23 22:59:41,460 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:59:41,462 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:59:41,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:59:41,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:59:41,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:59:41,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:59:41" (1/1) ... [2019-11-23 22:59:41,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cc86f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:41, skipping insertion in model container [2019-11-23 22:59:41,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:59:41" (1/1) ... [2019-11-23 22:59:41,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:59:41,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:59:41,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:59:41,709 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:59:41,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:59:41,750 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:59:41,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:41 WrapperNode [2019-11-23 22:59:41,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:59:41,752 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:59:41,752 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:59:41,752 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:59:41,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:41" (1/1) ... [2019-11-23 22:59:41,855 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:41" (1/1) ... [2019-11-23 22:59:41,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:59:41,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:59:41,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:59:41,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:59:41,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:41" (1/1) ... [2019-11-23 22:59:41,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:41" (1/1) ... [2019-11-23 22:59:41,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:41" (1/1) ... [2019-11-23 22:59:41,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:41" (1/1) ... [2019-11-23 22:59:41,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:41" (1/1) ... [2019-11-23 22:59:41,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:41" (1/1) ... [2019-11-23 22:59:41,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:41" (1/1) ... [2019-11-23 22:59:41,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:59:41,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:59:41,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:59:41,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:59:41,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:59:41,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:59:41,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:59:41,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:59:41,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:59:41,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:59:41,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:59:42,476 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:59:42,477 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 22:59:42,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:59:42 BoogieIcfgContainer [2019-11-23 22:59:42,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:59:42,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:59:42,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:59:42,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:59:42,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:59:41" (1/3) ... [2019-11-23 22:59:42,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530e0c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:59:42, skipping insertion in model container [2019-11-23 22:59:42,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:41" (2/3) ... [2019-11-23 22:59:42,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530e0c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:59:42, skipping insertion in model container [2019-11-23 22:59:42,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:59:42" (3/3) ... [2019-11-23 22:59:42,485 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m3.c [2019-11-23 22:59:42,495 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:59:42,503 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:59:42,514 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:59:42,535 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:59:42,535 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:59:42,535 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:59:42,535 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:59:42,535 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:59:42,536 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:59:42,536 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:59:42,536 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:59:42,547 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-23 22:59:42,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:59:42,553 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:42,554 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:59:42,554 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:42,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:42,560 INFO L82 PathProgramCache]: Analyzing trace with hash 331300031, now seen corresponding path program 1 times [2019-11-23 22:59:42,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:42,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303103653] [2019-11-23 22:59:42,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:59:42,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303103653] [2019-11-23 22:59:42,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:59:42,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:59:42,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76044220] [2019-11-23 22:59:42,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:59:42,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:59:42,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:59:42,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:59:42,778 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 4 states. [2019-11-23 22:59:42,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:59:42,866 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2019-11-23 22:59:42,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:59:42,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-23 22:59:42,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:59:42,878 INFO L225 Difference]: With dead ends: 32 [2019-11-23 22:59:42,879 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:59:42,882 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:59:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:59:42,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 22:59:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 22:59:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 29 transitions. [2019-11-23 22:59:42,931 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 29 transitions. Word has length 11 [2019-11-23 22:59:42,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:59:42,932 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 29 transitions. [2019-11-23 22:59:42,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:59:42,932 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 29 transitions. [2019-11-23 22:59:42,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:59:42,933 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:42,933 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:59:42,934 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:42,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:42,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1375133157, now seen corresponding path program 1 times [2019-11-23 22:59:42,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:42,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157090444] [2019-11-23 22:59:42,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:43,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:59:43,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157090444] [2019-11-23 22:59:43,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:59:43,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:59:43,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806931347] [2019-11-23 22:59:43,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:59:43,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:59:43,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:59:43,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:59:43,024 INFO L87 Difference]: Start difference. First operand 18 states and 29 transitions. Second operand 3 states. [2019-11-23 22:59:43,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:59:43,070 INFO L93 Difference]: Finished difference Result 34 states and 56 transitions. [2019-11-23 22:59:43,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:59:43,071 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-23 22:59:43,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:59:43,072 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:59:43,072 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 22:59:43,073 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:59:43,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 22:59:43,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-23 22:59:43,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:59:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 30 transitions. [2019-11-23 22:59:43,079 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 30 transitions. Word has length 12 [2019-11-23 22:59:43,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:59:43,079 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 30 transitions. [2019-11-23 22:59:43,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:59:43,080 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 30 transitions. [2019-11-23 22:59:43,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:59:43,080 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:43,081 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:59:43,081 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:43,081 INFO L82 PathProgramCache]: Analyzing trace with hash -312951973, now seen corresponding path program 1 times [2019-11-23 22:59:43,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:43,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892611832] [2019-11-23 22:59:43,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:59:43,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892611832] [2019-11-23 22:59:43,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:59:43,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:59:43,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745645916] [2019-11-23 22:59:43,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:59:43,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:59:43,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:59:43,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:59:43,133 INFO L87 Difference]: Start difference. First operand 19 states and 30 transitions. Second operand 4 states. [2019-11-23 22:59:43,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:59:43,209 INFO L93 Difference]: Finished difference Result 32 states and 52 transitions. [2019-11-23 22:59:43,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:59:43,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-23 22:59:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:59:43,211 INFO L225 Difference]: With dead ends: 32 [2019-11-23 22:59:43,212 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 22:59:43,212 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:59:43,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 22:59:43,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-23 22:59:43,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:59:43,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-23 22:59:43,218 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 13 [2019-11-23 22:59:43,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:59:43,219 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-23 22:59:43,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:59:43,219 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2019-11-23 22:59:43,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 22:59:43,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:43,220 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:59:43,220 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:43,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:43,221 INFO L82 PathProgramCache]: Analyzing trace with hash 860667680, now seen corresponding path program 1 times [2019-11-23 22:59:43,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:43,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906737276] [2019-11-23 22:59:43,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:59:43,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906737276] [2019-11-23 22:59:43,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892620367] [2019-11-23 22:59:43,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:59:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:43,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:59:43,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:59:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:59:43,457 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:59:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:59:43,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1592867132] [2019-11-23 22:59:43,527 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-23 22:59:43,527 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:59:43,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:59:43,555 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:59:43,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:00:20,397 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 264 [2019-11-23 23:00:22,198 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 267 [2019-11-23 23:00:31,769 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2019-11-23 23:00:31,899 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 286 [2019-11-23 23:00:35,982 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 294 [2019-11-23 23:00:36,202 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 296 [2019-11-23 23:00:40,495 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 305 [2019-11-23 23:00:40,606 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 305 [2019-11-23 23:00:42,956 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 306 [2019-11-23 23:00:45,420 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 312 [2019-11-23 23:00:47,514 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 316 [2019-11-23 23:00:47,630 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 316 [2019-11-23 23:00:50,192 WARN L192 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 322 [2019-11-23 23:00:50,474 WARN L192 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 318 [2019-11-23 23:00:50,661 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2019-11-23 23:00:50,787 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 320 [2019-11-23 23:00:53,183 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 324 [2019-11-23 23:00:53,307 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 324 [2019-11-23 23:00:55,890 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2019-11-23 23:00:56,019 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 325 [2019-11-23 23:00:56,166 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 326 [2019-11-23 23:00:56,278 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 327 [2019-11-23 23:00:59,513 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2019-11-23 23:00:59,637 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 331 [2019-11-23 23:01:02,227 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 334 [2019-11-23 23:01:02,350 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 335 [2019-11-23 23:01:04,854 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2019-11-23 23:01:05,040 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 338 [2019-11-23 23:01:07,458 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 343 [2019-11-23 23:01:07,606 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 340 [2019-11-23 23:01:10,126 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2019-11-23 23:01:10,282 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 344