/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-tiling/rew.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:27:32,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:27:32,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:27:32,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:27:32,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:27:32,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:27:32,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:27:32,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:27:32,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:27:32,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:27:32,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:27:32,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:27:32,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:27:32,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:27:32,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:27:32,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:27:32,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:27:32,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:27:32,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:27:32,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:27:32,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:27:32,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:27:32,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:27:32,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:27:32,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:27:32,975 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 23:27:32,989 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:27:32,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:27:32,990 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:27:32,991 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:27:32,991 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:27:32,991 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:27:32,991 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:27:32,991 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:27:32,992 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:27:32,992 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:27:32,992 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:27:32,992 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:27:32,992 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:27:32,993 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:27:32,993 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:27:32,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:27:32,994 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:27:32,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:27:32,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:27:32,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:27:32,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:27:32,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:27:32,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:27:32,995 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:27:32,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:27:32,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:27:32,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:27:32,996 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:27:32,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:27:32,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:27:32,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:27:32,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:27:32,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:27:32,997 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:27:32,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:27:32,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:27:32,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:27:32,998 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:27:33,293 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:27:33,315 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:27:33,321 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:27:33,322 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:27:33,323 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:27:33,323 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/rew.c [2019-11-23 23:27:33,383 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3679175f5/4aa398a84656489694feb32fc70f7b62/FLAG4e50301e1 [2019-11-23 23:27:33,812 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:27:33,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rew.c [2019-11-23 23:27:33,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3679175f5/4aa398a84656489694feb32fc70f7b62/FLAG4e50301e1 [2019-11-23 23:27:34,208 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3679175f5/4aa398a84656489694feb32fc70f7b62 [2019-11-23 23:27:34,220 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:27:34,221 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:27:34,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:27:34,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:27:34,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:27:34,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:27:34" (1/1) ... [2019-11-23 23:27:34,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3824762d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:34, skipping insertion in model container [2019-11-23 23:27:34,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:27:34" (1/1) ... [2019-11-23 23:27:34,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:27:34,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:27:34,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:27:34,454 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:27:34,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:27:34,483 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:27:34,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:34 WrapperNode [2019-11-23 23:27:34,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:27:34,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:27:34,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:27:34,485 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:27:34,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:34" (1/1) ... [2019-11-23 23:27:34,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:34" (1/1) ... [2019-11-23 23:27:34,601 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:27:34,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:27:34,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:27:34,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:27:34,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:34" (1/1) ... [2019-11-23 23:27:34,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:34" (1/1) ... [2019-11-23 23:27:34,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:34" (1/1) ... [2019-11-23 23:27:34,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:34" (1/1) ... [2019-11-23 23:27:34,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:34" (1/1) ... [2019-11-23 23:27:34,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:34" (1/1) ... [2019-11-23 23:27:34,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:34" (1/1) ... [2019-11-23 23:27:34,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:27:34,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:27:34,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:27:34,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:27:34,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:34" (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 23:27:34,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:27:34,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 23:27:34,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:27:34,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:27:34,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:27:35,039 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:27:35,040 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 23:27:35,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:27:35 BoogieIcfgContainer [2019-11-23 23:27:35,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:27:35,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:27:35,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:27:35,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:27:35,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:27:34" (1/3) ... [2019-11-23 23:27:35,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebe2dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:27:35, skipping insertion in model container [2019-11-23 23:27:35,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:27:34" (2/3) ... [2019-11-23 23:27:35,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebe2dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:27:35, skipping insertion in model container [2019-11-23 23:27:35,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:27:35" (3/3) ... [2019-11-23 23:27:35,062 INFO L109 eAbstractionObserver]: Analyzing ICFG rew.c [2019-11-23 23:27:35,071 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:27:35,078 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:27:35,089 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:27:35,113 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:27:35,114 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:27:35,114 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:27:35,114 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:27:35,114 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:27:35,114 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:27:35,114 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:27:35,115 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:27:35,129 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-23 23:27:35,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:27:35,135 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:27:35,136 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:27:35,136 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:27:35,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:27:35,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1768954546, now seen corresponding path program 1 times [2019-11-23 23:27:35,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:27:35,152 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257512069] [2019-11-23 23:27:35,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:27:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:27:35,331 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 23:27:35,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257512069] [2019-11-23 23:27:35,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:27:35,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:27:35,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380695106] [2019-11-23 23:27:35,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:27:35,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:27:35,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:27:35,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:27:35,354 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2019-11-23 23:27:35,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:27:35,392 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2019-11-23 23:27:35,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:27:35,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:27:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:27:35,404 INFO L225 Difference]: With dead ends: 18 [2019-11-23 23:27:35,405 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 23:27:35,408 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:27:35,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 23:27:35,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-23 23:27:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 23:27:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-23 23:27:35,442 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2019-11-23 23:27:35,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:27:35,442 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-23 23:27:35,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:27:35,443 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-23 23:27:35,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:27:35,443 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:27:35,444 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:27:35,444 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:27:35,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:27:35,445 INFO L82 PathProgramCache]: Analyzing trace with hash 996117077, now seen corresponding path program 1 times [2019-11-23 23:27:35,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:27:35,445 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938758400] [2019-11-23 23:27:35,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:27:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:27:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:27:35,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938758400] [2019-11-23 23:27:35,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144478991] [2019-11-23 23:27:35,500 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 23:27:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:27:35,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 23:27:35,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:27:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:27:35,634 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:27:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:27:35,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [223353863] [2019-11-23 23:27:35,694 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:27:35,695 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:27:35,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:27:35,732 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:27:35,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:27:36,261 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:27:36,709 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:27:37,381 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:27:38,554 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 126 [2019-11-23 23:27:38,755 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-23 23:27:38,884 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 130 [2019-11-23 23:27:39,159 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 134 [2019-11-23 23:27:39,500 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:27:39,633 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 337 [2019-11-23 23:27:42,009 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 336 [2019-11-23 23:27:44,155 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 330 [2019-11-23 23:27:44,336 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 325 [2019-11-23 23:27:47,687 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:27:49,191 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:27:50,109 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 155 [2019-11-23 23:27:50,694 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:27:50,881 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-23 23:27:52,112 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 159 [2019-11-23 23:27:52,629 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:27:53,968 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:27:54,620 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2019-11-23 23:27:55,770 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:27:57,392 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:27:59,139 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:00,795 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2019-11-23 23:28:01,156 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2019-11-23 23:28:01,308 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 271 [2019-11-23 23:28:01,594 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 265 [2019-11-23 23:28:01,740 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2019-11-23 23:28:01,957 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2019-11-23 23:28:02,144 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2019-11-23 23:28:02,294 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2019-11-23 23:28:02,473 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 236 [2019-11-23 23:28:02,629 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 231 [2019-11-23 23:28:02,775 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2019-11-23 23:28:03,094 WARN L192 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2019-11-23 23:28:03,408 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:04,734 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:06,400 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:08,473 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:10,106 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:11,900 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 185 [2019-11-23 23:28:12,214 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:14,502 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:16,557 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:18,537 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 190 [2019-11-23 23:28:19,004 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:21,388 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:21,986 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-23 23:28:23,261 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 200 [2019-11-23 23:28:23,469 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 207 [2019-11-23 23:28:29,795 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (let ((.cse0 (* ULTIMATE.start_main_~i~0 4))) (= (+ ULTIMATE.start_main_~a~0.offset .cse0 (- 4)) (+ ULTIMATE.start_main_~a~0.offset .cse0))) [2019-11-23 23:28:31,801 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= ULTIMATE.start_main_~val2~0 ULTIMATE.start_main_~val1~0) [2019-11-23 23:28:33,806 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset (* ULTIMATE.start_main_~i~0 4))) ULTIMATE.start_main_~val1~0) [2019-11-23 23:28:35,815 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset (* ULTIMATE.start_main_~i~0 4))) ULTIMATE.start_main_~val1~0) [2019-11-23 23:28:37,818 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset (* ULTIMATE.start_main_~i~0 4))) ULTIMATE.start_main_~val2~0) [2019-11-23 23:28:39,831 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset (* ULTIMATE.start_main_~i~0 4))) ULTIMATE.start_main_~val2~0) [2019-11-23 23:28:41,839 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= ULTIMATE.start_main_~val2~0 (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset (* ULTIMATE.start_main_~i~0 4) (- 4)))) [2019-11-23 23:28:43,845 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= ULTIMATE.start_main_~val2~0 (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset (* ULTIMATE.start_main_~i~0 4) (- 4)))) [2019-11-23 23:28:44,097 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 696 [2019-11-23 23:28:48,921 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 691 [2019-11-23 23:28:52,432 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 685 [2019-11-23 23:28:55,155 WARN L192 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 679 [2019-11-23 23:29:01,211 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (let ((.cse0 (* ULTIMATE.start_main_~i~0 4))) (= (+ ULTIMATE.start_main_~a~0.offset .cse0 (- 4)) (+ ULTIMATE.start_main_~a~0.offset .cse0))) [2019-11-23 23:29:03,215 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= ULTIMATE.start_main_~val2~0 ULTIMATE.start_main_~val1~0) [2019-11-23 23:29:05,224 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset (* ULTIMATE.start_main_~i~0 4))) ULTIMATE.start_main_~val1~0) [2019-11-23 23:29:07,230 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset (* ULTIMATE.start_main_~i~0 4))) ULTIMATE.start_main_~val1~0) [2019-11-23 23:29:09,236 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset (* ULTIMATE.start_main_~i~0 4))) ULTIMATE.start_main_~val2~0) [2019-11-23 23:29:11,248 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset (* ULTIMATE.start_main_~i~0 4))) ULTIMATE.start_main_~val2~0) [2019-11-23 23:29:13,250 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= ULTIMATE.start_main_~val2~0 (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset (* ULTIMATE.start_main_~i~0 4) (- 4))))