/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/rewrev.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:29:00,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:29:00,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:29:00,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:29:00,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:29:00,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:29:00,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:29:00,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:29:00,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:29:00,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:29:00,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:29:00,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:29:00,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:29:00,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:29:00,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:29:00,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:29:00,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:29:00,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:29:00,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:29:00,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:29:00,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:29:00,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:29:00,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:29:00,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:29:00,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:29:00,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:29:00,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:29:00,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:29:00,408 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 23:29:00,444 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:29:00,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:29:00,446 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:29:00,446 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:29:00,446 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:29:00,446 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:29:00,446 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:29:00,447 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:29:00,447 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:29:00,447 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:29:00,447 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:29:00,447 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:29:00,448 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:29:00,448 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:29:00,448 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:29:00,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:29:00,452 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:29:00,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:29:00,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:29:00,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:29:00,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:29:00,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:29:00,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:29:00,453 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:29:00,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:29:00,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:29:00,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:29:00,455 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:29:00,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:29:00,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:29:00,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:29:00,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:29:00,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:29:00,457 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:29:00,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:29:00,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:29:00,458 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:29:00,458 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:29:00,724 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:29:00,747 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:29:00,752 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:29:00,753 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:29:00,754 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:29:00,754 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/rewrev.c [2019-11-23 23:29:00,832 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc63a2d56/556c0f6d9a8a4e289854ba07cf02e14d/FLAG148c808c6 [2019-11-23 23:29:01,326 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:29:01,327 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rewrev.c [2019-11-23 23:29:01,334 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc63a2d56/556c0f6d9a8a4e289854ba07cf02e14d/FLAG148c808c6 [2019-11-23 23:29:01,656 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc63a2d56/556c0f6d9a8a4e289854ba07cf02e14d [2019-11-23 23:29:01,668 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:29:01,669 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:29:01,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:29:01,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:29:01,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:29:01,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:29:01" (1/1) ... [2019-11-23 23:29:01,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3feed334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:01, skipping insertion in model container [2019-11-23 23:29:01,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:29:01" (1/1) ... [2019-11-23 23:29:01,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:29:01,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:29:01,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:29:01,893 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:29:01,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:29:01,922 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:29:01,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:01 WrapperNode [2019-11-23 23:29:01,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:29:01,923 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:29:01,923 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:29:01,923 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:29:01,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:01" (1/1) ... [2019-11-23 23:29:02,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:01" (1/1) ... [2019-11-23 23:29:02,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:29:02,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:29:02,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:29:02,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:29:02,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:01" (1/1) ... [2019-11-23 23:29:02,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:01" (1/1) ... [2019-11-23 23:29:02,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:01" (1/1) ... [2019-11-23 23:29:02,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:01" (1/1) ... [2019-11-23 23:29:02,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:01" (1/1) ... [2019-11-23 23:29:02,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:01" (1/1) ... [2019-11-23 23:29:02,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:01" (1/1) ... [2019-11-23 23:29:02,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:29:02,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:29:02,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:29:02,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:29:02,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:01" (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 23:29:02,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:29:02,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 23:29:02,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:29:02,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:29:02,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:29:02,441 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:29:02,442 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 23:29:02,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:29:02 BoogieIcfgContainer [2019-11-23 23:29:02,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:29:02,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:29:02,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:29:02,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:29:02,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:29:01" (1/3) ... [2019-11-23 23:29:02,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46eceebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:29:02, skipping insertion in model container [2019-11-23 23:29:02,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:01" (2/3) ... [2019-11-23 23:29:02,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46eceebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:29:02, skipping insertion in model container [2019-11-23 23:29:02,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:29:02" (3/3) ... [2019-11-23 23:29:02,452 INFO L109 eAbstractionObserver]: Analyzing ICFG rewrev.c [2019-11-23 23:29:02,463 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:29:02,472 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:29:02,487 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:29:02,519 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:29:02,519 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:29:02,520 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:29:02,520 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:29:02,520 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:29:02,520 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:29:02,520 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:29:02,520 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:29:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-23 23:29:02,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:29:02,545 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:29:02,546 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:29:02,546 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:29:02,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:29:02,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1768954546, now seen corresponding path program 1 times [2019-11-23 23:29:02,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:29:02,564 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916634719] [2019-11-23 23:29:02,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:29:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:29:02,712 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 23:29:02,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916634719] [2019-11-23 23:29:02,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:29:02,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:29:02,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590881641] [2019-11-23 23:29:02,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:29:02,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:29:02,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:29:02,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:29:02,731 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2019-11-23 23:29:02,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:29:02,788 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2019-11-23 23:29:02,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:29:02,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:29:02,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:29:02,798 INFO L225 Difference]: With dead ends: 20 [2019-11-23 23:29:02,799 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 23:29:02,802 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 23:29:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 23:29:02,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-23 23:29:02,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 23:29:02,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-23 23:29:02,832 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2019-11-23 23:29:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:29:02,833 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-23 23:29:02,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:29:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-23 23:29:02,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:29:02,834 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:29:02,834 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:29:02,834 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:29:02,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:29:02,835 INFO L82 PathProgramCache]: Analyzing trace with hash 996117077, now seen corresponding path program 1 times [2019-11-23 23:29:02,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:29:02,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888858664] [2019-11-23 23:29:02,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:29:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:29:02,895 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 23:29:02,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888858664] [2019-11-23 23:29:02,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272761939] [2019-11-23 23:29:02,896 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 23:29:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:29:02,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 23:29:02,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:29:02,971 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 23:29:02,971 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:29:02,987 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 23:29:02,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [21830483] [2019-11-23 23:29:03,018 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:29:03,019 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:29:03,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:29:03,043 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:29:03,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:29:03,294 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:29:03,616 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:29:04,160 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:29:04,647 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 124 [2019-11-23 23:29:04,774 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 124 [2019-11-23 23:29:04,912 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:29:05,147 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2019-11-23 23:29:05,987 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:29:06,525 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-23 23:29:06,989 WARN L192 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 55 [2019-11-23 23:29:07,352 WARN L192 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 41 [2019-11-23 23:29:07,610 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 38 [2019-11-23 23:29:07,929 WARN L192 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 54 [2019-11-23 23:29:07,932 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:29:07,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-23 23:29:07,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2019-11-23 23:29:07,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117173500] [2019-11-23 23:29:07,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:29:07,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:29:07,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:29:07,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-23 23:29:07,942 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-11-23 23:29:07,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:29:07,963 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-11-23 23:29:07,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:29:07,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 23:29:07,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:29:07,964 INFO L225 Difference]: With dead ends: 15 [2019-11-23 23:29:07,964 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 23:29:07,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-23 23:29:07,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 23:29:07,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 23:29:07,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 23:29:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-11-23 23:29:07,969 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2019-11-23 23:29:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:29:07,975 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-11-23 23:29:07,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:29:07,975 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-11-23 23:29:07,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:29:07,976 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:29:07,977 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-11-23 23:29:08,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:29:08,182 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:29:08,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:29:08,182 INFO L82 PathProgramCache]: Analyzing trace with hash 813991470, now seen corresponding path program 2 times [2019-11-23 23:29:08,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:29:08,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487873859] [2019-11-23 23:29:08,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:29:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:29:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:29:08,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487873859] [2019-11-23 23:29:08,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517951661] [2019-11-23 23:29:08,389 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:29:08,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 23:29:08,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 23:29:08,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 23:29:08,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:29:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:29:08,548 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:29:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:29:08,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [851140699] [2019-11-23 23:29:08,690 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:29:08,690 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:29:08,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:29:08,691 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:29:08,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:29:08,744 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:29:08,799 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:29:09,316 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:29:10,226 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:29:10,856 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:29:11,260 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-23 23:29:11,546 WARN L192 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 55 [2019-11-23 23:29:11,848 WARN L192 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 41 [2019-11-23 23:29:12,121 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 38 [2019-11-23 23:29:12,451 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 54 [2019-11-23 23:29:12,452 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:29:12,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-23 23:29:12,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2019-11-23 23:29:12,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098699359] [2019-11-23 23:29:12,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 23:29:12,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:29:12,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 23:29:12,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2019-11-23 23:29:12,455 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 16 states. [2019-11-23 23:29:13,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:29:13,147 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2019-11-23 23:29:13,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 23:29:13,147 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2019-11-23 23:29:13,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:29:13,149 INFO L225 Difference]: With dead ends: 26 [2019-11-23 23:29:13,149 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 23:29:13,150 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=288, Invalid=902, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 23:29:13,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 23:29:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 12. [2019-11-23 23:29:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:29:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-11-23 23:29:13,154 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2019-11-23 23:29:13,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:29:13,155 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-23 23:29:13,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 23:29:13,155 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-11-23 23:29:13,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 23:29:13,156 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:29:13,156 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:29:13,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:29:13,359 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:29:13,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:29:13,360 INFO L82 PathProgramCache]: Analyzing trace with hash 239747048, now seen corresponding path program 1 times [2019-11-23 23:29:13,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:29:13,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658808844] [2019-11-23 23:29:13,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:29:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:29:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:29:13,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658808844] [2019-11-23 23:29:13,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072834828] [2019-11-23 23:29:13,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:29:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:29:13,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 23:29:13,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:29:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:29:14,117 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:29:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:29:14,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2095487879] [2019-11-23 23:29:14,335 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-23 23:29:14,335 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:29:14,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:29:14,336 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:29:14,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:29:14,373 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:29:14,454 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:29:14,755 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:29:15,421 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:29:16,097 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 130 [2019-11-23 23:29:16,515 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:29:17,885 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 231 [2019-11-23 23:29:18,104 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 296 [2019-11-23 23:29:18,323 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 294 [2019-11-23 23:29:18,639 WARN L192 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 389 [2019-11-23 23:29:19,038 WARN L192 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 382 [2019-11-23 23:29:19,825 WARN L192 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 489 [2019-11-23 23:29:20,369 WARN L192 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 457 [2019-11-23 23:29:20,724 WARN L192 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 434 [2019-11-23 23:29:21,099 WARN L192 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 435 [2019-11-23 23:29:21,602 WARN L192 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 549 [2019-11-23 23:29:22,181 WARN L192 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 543 [2019-11-23 23:29:23,018 WARN L192 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 702 [2019-11-23 23:29:23,989 WARN L192 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 700 [2019-11-23 23:29:25,381 WARN L192 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 886 DAG size of output: 884 [2019-11-23 23:29:26,878 WARN L192 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 884 DAG size of output: 883 [2019-11-23 23:29:29,135 WARN L192 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 1084 DAG size of output: 1077 [2019-11-23 23:29:31,871 WARN L192 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 1075 DAG size of output: 1074 [2019-11-23 23:29:35,512 WARN L192 SmtUtils]: Spent 3.53 s on a formula simplification. DAG size of input: 1373 DAG size of output: 1366 [2019-11-23 23:29:39,661 WARN L192 SmtUtils]: Spent 3.77 s on a formula simplification. DAG size of input: 1358 DAG size of output: 1349 [2019-11-23 23:29:46,211 WARN L192 SmtUtils]: Spent 6.41 s on a formula simplification. DAG size of input: 1755 DAG size of output: 1744 [2019-11-23 23:29:52,563 WARN L192 SmtUtils]: Spent 6.04 s on a formula simplification. DAG size of input: 1731 DAG size of output: 1731 [2019-11-23 23:30:03,480 WARN L192 SmtUtils]: Spent 10.73 s on a formula simplification. DAG size of input: 2311 DAG size of output: 2295 [2019-11-23 23:30:14,356 WARN L192 SmtUtils]: Spent 10.27 s on a formula simplification. DAG size of input: 2279 DAG size of output: 2278 [2019-11-23 23:30:33,792 WARN L192 SmtUtils]: Spent 19.19 s on a formula simplification. DAG size of input: 3035 DAG size of output: 3010