/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-multidimensional/init-non-constant-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:20:51,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:20:51,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:20:51,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:20:51,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:20:51,178 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:20:51,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:20:51,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:20:51,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:20:51,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:20:51,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:20:51,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:20:51,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:20:51,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:20:51,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:20:51,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:20:51,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:20:51,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:20:51,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:20:51,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:20:51,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:20:51,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:20:51,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:20:51,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:20:51,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:20:51,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:20:51,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:20:51,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:20:51,242 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 23:20:51,271 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:20:51,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:20:51,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:20:51,273 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:20:51,273 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:20:51,273 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:20:51,273 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:20:51,274 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:20:51,274 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:20:51,274 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:20:51,275 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:20:51,275 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:20:51,276 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:20:51,276 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:20:51,276 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:20:51,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:20:51,278 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:20:51,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:20:51,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:20:51,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:20:51,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:20:51,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:20:51,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:20:51,279 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:20:51,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:20:51,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:20:51,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:20:51,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:20:51,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:20:51,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:20:51,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:20:51,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:20:51,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:20:51,282 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:20:51,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:20:51,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:20:51,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:20:51,283 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:20:51,607 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:20:51,623 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:20:51,627 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:20:51,629 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:20:51,631 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:20:51,632 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-non-constant-2-n-u.c [2019-11-23 23:20:51,703 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b812f912/b25fc4f97b0a4e88bdeb2fcea58779af/FLAG4cbed922b [2019-11-23 23:20:52,149 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:20:52,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-non-constant-2-n-u.c [2019-11-23 23:20:52,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b812f912/b25fc4f97b0a4e88bdeb2fcea58779af/FLAG4cbed922b [2019-11-23 23:20:52,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b812f912/b25fc4f97b0a4e88bdeb2fcea58779af [2019-11-23 23:20:52,580 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:20:52,581 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:20:52,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:20:52,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:20:52,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:20:52,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:20:52" (1/1) ... [2019-11-23 23:20:52,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a425a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:52, skipping insertion in model container [2019-11-23 23:20:52,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:20:52" (1/1) ... [2019-11-23 23:20:52,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:20:52,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:20:52,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:20:52,831 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:20:52,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:20:52,869 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:20:52,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:52 WrapperNode [2019-11-23 23:20:52,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:20:52,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:20:52,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:20:52,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:20:52,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:52" (1/1) ... [2019-11-23 23:20:52,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:52" (1/1) ... [2019-11-23 23:20:52,980 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:20:52,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:20:52,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:20:52,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:20:52,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:52" (1/1) ... [2019-11-23 23:20:52,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:52" (1/1) ... [2019-11-23 23:20:52,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:52" (1/1) ... [2019-11-23 23:20:52,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:52" (1/1) ... [2019-11-23 23:20:52,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:52" (1/1) ... [2019-11-23 23:20:53,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:52" (1/1) ... [2019-11-23 23:20:53,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:52" (1/1) ... [2019-11-23 23:20:53,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:20:53,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:20:53,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:20:53,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:20:53,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:52" (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 23:20:53,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:20:53,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:20:53,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:20:53,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:20:53,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:20:53,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:20:53,452 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:20:53,453 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 23:20:53,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:20:53 BoogieIcfgContainer [2019-11-23 23:20:53,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:20:53,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:20:53,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:20:53,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:20:53,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:20:52" (1/3) ... [2019-11-23 23:20:53,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba85a23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:20:53, skipping insertion in model container [2019-11-23 23:20:53,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:52" (2/3) ... [2019-11-23 23:20:53,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba85a23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:20:53, skipping insertion in model container [2019-11-23 23:20:53,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:20:53" (3/3) ... [2019-11-23 23:20:53,461 INFO L109 eAbstractionObserver]: Analyzing ICFG init-non-constant-2-n-u.c [2019-11-23 23:20:53,468 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:20:53,478 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:20:53,487 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:20:53,506 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:20:53,507 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:20:53,507 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:20:53,507 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:20:53,507 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:20:53,507 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:20:53,507 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:20:53,507 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:20:53,519 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-23 23:20:53,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:20:53,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:53,526 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:20:53,526 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:53,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:53,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1363487120, now seen corresponding path program 1 times [2019-11-23 23:20:53,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:53,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861063340] [2019-11-23 23:20:53,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:53,613 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:53,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91143271] [2019-11-23 23:20:53,615 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 23:20:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:53,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 23:20:53,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:53,731 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 23:20:53,732 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:53,749 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 23:20:53,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861063340] [2019-11-23 23:20:53,750 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:53,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91143271] [2019-11-23 23:20:53,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:20:53,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-23 23:20:53,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885671042] [2019-11-23 23:20:53,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 23:20:53,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:20:53,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 23:20:53,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:20:53,769 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 5 states. [2019-11-23 23:20:53,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:20:53,894 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2019-11-23 23:20:53,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 23:20:53,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-23 23:20:53,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:20:53,907 INFO L225 Difference]: With dead ends: 28 [2019-11-23 23:20:53,907 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 23:20:53,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 23:20:53,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 23:20:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2019-11-23 23:20:53,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 23:20:53,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2019-11-23 23:20:53,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 6 [2019-11-23 23:20:53,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:20:53,939 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2019-11-23 23:20:53,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 23:20:53,939 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2019-11-23 23:20:53,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:20:53,939 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:53,940 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:20:54,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:20:54,144 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:54,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:54,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1632989966, now seen corresponding path program 1 times [2019-11-23 23:20:54,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:54,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488783959] [2019-11-23 23:20:54,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:54,153 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:54,153 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878799055] [2019-11-23 23:20:54,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:20:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:54,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 23:20:54,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:20:54,237 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:20:54,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488783959] [2019-11-23 23:20:54,264 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:54,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878799055] [2019-11-23 23:20:54,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:20:54,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2019-11-23 23:20:54,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600177789] [2019-11-23 23:20:54,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 23:20:54,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:20:54,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 23:20:54,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:20:54,269 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 6 states. [2019-11-23 23:20:54,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:20:54,385 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2019-11-23 23:20:54,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 23:20:54,386 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-11-23 23:20:54,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:20:54,387 INFO L225 Difference]: With dead ends: 31 [2019-11-23 23:20:54,387 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 23:20:54,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-23 23:20:54,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 23:20:54,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2019-11-23 23:20:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:20:54,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2019-11-23 23:20:54,393 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2019-11-23 23:20:54,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:20:54,394 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2019-11-23 23:20:54,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 23:20:54,394 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2019-11-23 23:20:54,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 23:20:54,395 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:54,395 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:20:54,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:20:54,600 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:54,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:54,602 INFO L82 PathProgramCache]: Analyzing trace with hash 182471476, now seen corresponding path program 1 times [2019-11-23 23:20:54,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:54,602 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056145414] [2019-11-23 23:20:54,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:54,606 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:54,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405315717] [2019-11-23 23:20:54,607 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 23:20:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:54,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 23:20:54,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:54,740 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-23 23:20:54,740 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 23:20:54,745 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 23:20:54,745 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 23:20:54,745 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-23 23:20:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:20:54,789 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:54,871 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2019-11-23 23:20:54,879 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2019-11-23 23:20:54,881 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 23:20:54,898 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 23:20:54,899 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 23:20:54,920 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 23:20:54,921 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 23:20:54,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 23:20:54,928 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 23:20:54,931 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-23 23:20:54,934 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:26, output treesize:45 [2019-11-23 23:20:54,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 23:20:54,935 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 23:20:54,935 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 23:20:55,025 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 23:20:55,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 23:20:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:20:55,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056145414] [2019-11-23 23:20:55,186 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:55,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405315717] [2019-11-23 23:20:55,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1628025440] [2019-11-23 23:20:55,214 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-23 23:20:55,214 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:20:55,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:20:55,247 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:20:55,247 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:20:55,701 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:56,210 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:56,277 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:56,291 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:56,880 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 155 [2019-11-23 23:20:57,027 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:57,200 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:57,253 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:57,270 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:57,320 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:57,336 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:57,575 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 192 [2019-11-23 23:20:57,705 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 192 [2019-11-23 23:20:57,844 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 189 [2019-11-23 23:20:58,212 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,284 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,299 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,363 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,451 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,502 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,669 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 182 [2019-11-23 23:20:59,073 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 195 [2019-11-23 23:20:59,231 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2019-11-23 23:20:59,335 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 202 [2019-11-23 23:20:59,527 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,543 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,711 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,838 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,997 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,039 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,146 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,272 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,595 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 284 [2019-11-23 23:21:00,718 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2019-11-23 23:21:00,915 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,931 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,947 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,962 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,981 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:01,000 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:01,125 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:01,144 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:01,262 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:01,280 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:01,294 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:01,468 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:01,489 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:01,500 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:01,576 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:01,609 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:01,622 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:02,122 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-23 23:21:02,540 WARN L192 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 218 [2019-11-23 23:21:02,913 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 59 [2019-11-23 23:21:02,995 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:21:02,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 23:21:02,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-11-23 23:21:02,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239728246] [2019-11-23 23:21:02,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 23:21:02,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:21:02,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 23:21:02,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=280, Unknown=1, NotChecked=0, Total=342 [2019-11-23 23:21:02,998 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand 14 states. [2019-11-23 23:21:03,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:21:03,466 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2019-11-23 23:21:03,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 23:21:03,474 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 9 [2019-11-23 23:21:03,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:21:03,475 INFO L225 Difference]: With dead ends: 48 [2019-11-23 23:21:03,475 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 23:21:03,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=131, Invalid=518, Unknown=1, NotChecked=0, Total=650 [2019-11-23 23:21:03,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 23:21:03,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 18. [2019-11-23 23:21:03,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 23:21:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2019-11-23 23:21:03,482 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 9 [2019-11-23 23:21:03,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:21:03,482 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2019-11-23 23:21:03,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 23:21:03,482 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2019-11-23 23:21:03,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 23:21:03,483 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:21:03,483 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:21:03,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:21:03,688 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:21:03,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:21:03,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1416013093, now seen corresponding path program 1 times [2019-11-23 23:21:03,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:21:03,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705498850] [2019-11-23 23:21:03,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:21:03,694 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:21:03,694 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761851369] [2019-11-23 23:21:03,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:21:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:21:03,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 23:21:03,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:21:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:21:03,777 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:21:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:21:03,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705498850] [2019-11-23 23:21:03,804 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:21:03,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761851369] [2019-11-23 23:21:03,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [874008492] [2019-11-23 23:21:03,807 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 23:21:03,807 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:21:03,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:21:03,809 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:21:03,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:21:03,935 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,142 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,183 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,251 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,027 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,154 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,169 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,211 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,225 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,240 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:08,542 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 280 [2019-11-23 23:21:08,778 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 337 [2019-11-23 23:21:08,967 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 337 [2019-11-23 23:21:09,214 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 418 [2019-11-23 23:21:09,479 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 415 [2019-11-23 23:21:09,872 WARN L192 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 520 [2019-11-23 23:21:10,278 WARN L192 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 518 [2019-11-23 23:21:12,973 WARN L192 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 522 [2019-11-23 23:21:13,390 WARN L192 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 523 [2019-11-23 23:21:13,861 WARN L192 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 527 [2019-11-23 23:21:14,298 WARN L192 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 528 [2019-11-23 23:21:14,805 WARN L192 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 532 [2019-11-23 23:21:15,251 WARN L192 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 531 [2019-11-23 23:21:15,711 WARN L192 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 533 [2019-11-23 23:21:16,161 WARN L192 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 534 [2019-11-23 23:21:16,650 WARN L192 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 538 [2019-11-23 23:21:17,101 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 539 [2019-11-23 23:21:17,574 WARN L192 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 543 [2019-11-23 23:21:18,057 WARN L192 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 523 [2019-11-23 23:21:18,472 WARN L192 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 516 [2019-11-23 23:21:18,852 WARN L192 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 517 [2019-11-23 23:21:19,507 WARN L192 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 655 DAG size of output: 652 [2019-11-23 23:21:20,138 WARN L192 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 650 DAG size of output: 644 [2019-11-23 23:21:21,180 WARN L192 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 790 DAG size of output: 785 [2019-11-23 23:21:22,193 WARN L192 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 784 DAG size of output: 779 [2019-11-23 23:21:24,155 WARN L192 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 1044 DAG size of output: 1036 [2019-11-23 23:21:26,083 WARN L192 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 1028 DAG size of output: 1022 [2019-11-23 23:21:29,479 WARN L192 SmtUtils]: Spent 3.28 s on a formula simplification. DAG size of input: 1356 DAG size of output: 1349 [2019-11-23 23:21:32,814 WARN L192 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 1344 DAG size of output: 1338 [2019-11-23 23:21:39,789 WARN L192 SmtUtils]: Spent 6.80 s on a formula simplification. DAG size of input: 1851 DAG size of output: 1826 [2019-11-23 23:21:46,139 WARN L192 SmtUtils]: Spent 6.15 s on a formula simplification. DAG size of input: 1804 DAG size of output: 1799 [2019-11-23 23:22:00,262 WARN L192 SmtUtils]: Spent 13.73 s on a formula simplification. DAG size of input: 2557 DAG size of output: 2540 [2019-11-23 23:22:12,523 WARN L192 SmtUtils]: Spent 11.99 s on a formula simplification. DAG size of input: 2480 DAG size of output: 2456 [2019-11-23 23:22:25,037 WARN L192 SmtUtils]: Spent 11.94 s on a formula simplification that was a NOOP. DAG size: 2441