java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-multidimensional/max-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:37:14,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:37:14,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:37:14,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:37:14,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:37:14,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:37:14,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:37:14,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:37:14,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:37:14,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:37:14,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:37:14,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:37:14,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:37:14,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:37:14,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:37:14,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:37:14,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:37:14,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:37:14,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:37:14,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:37:14,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:37:14,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:37:14,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:37:14,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:37:14,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:37:14,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:37:14,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:37:14,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:37:14,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:37:14,345 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:37:14,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:37:14,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:37:14,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:37:14,347 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:37:14,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:37:14,348 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:37:14,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:37:14,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:37:14,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:37:14,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:37:14,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:37:14,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:37:14,349 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:37:14,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:37:14,350 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:37:14,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:37:14,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:37:14,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:37:14,350 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:37:14,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:37:14,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:37:14,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:37:14,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:37:14,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:37:14,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:37:14,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:37:14,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:37:14,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:37:14,610 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:37:14,624 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:37:14,629 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:37:14,630 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:37:14,631 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:37:14,631 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/max-2-u.c [2019-10-15 01:37:14,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57bfa7f2e/a9a700114e884506ad8a4a4593e7f2d4/FLAGa9786e0ca [2019-10-15 01:37:15,181 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:37:15,181 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/max-2-u.c [2019-10-15 01:37:15,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57bfa7f2e/a9a700114e884506ad8a4a4593e7f2d4/FLAGa9786e0ca [2019-10-15 01:37:15,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57bfa7f2e/a9a700114e884506ad8a4a4593e7f2d4 [2019-10-15 01:37:15,616 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:37:15,617 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:37:15,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:15,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:37:15,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:37:15,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:15,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32b073ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15, skipping insertion in model container [2019-10-15 01:37:15,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:15,633 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:37:15,648 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:37:15,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:15,829 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:37:15,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:15,955 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:37:15,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15 WrapperNode [2019-10-15 01:37:15,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:15,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:37:15,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:37:15,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:37:15,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:15,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:15,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:15,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:15,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:16,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:16,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:16,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:37:16,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:37:16,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:37:16,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:37:16,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (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 [2019-10-15 01:37:16,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:37:16,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:37:16,075 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:37:16,075 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:37:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:37:16,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:37:16,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:37:16,076 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:37:16,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:37:16,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:37:16,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:37:16,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:37:16,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:37:16,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:37:16,497 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:37:16,497 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-15 01:37:16,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:16 BoogieIcfgContainer [2019-10-15 01:37:16,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:37:16,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:37:16,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:37:16,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:37:16,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:37:15" (1/3) ... [2019-10-15 01:37:16,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d1747b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:16, skipping insertion in model container [2019-10-15 01:37:16,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15" (2/3) ... [2019-10-15 01:37:16,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d1747b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:16, skipping insertion in model container [2019-10-15 01:37:16,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:16" (3/3) ... [2019-10-15 01:37:16,506 INFO L109 eAbstractionObserver]: Analyzing ICFG max-2-u.c [2019-10-15 01:37:16,515 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:37:16,523 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:37:16,534 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:37:16,557 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:37:16,558 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:37:16,558 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:37:16,558 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:37:16,559 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:37:16,559 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:37:16,559 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:37:16,560 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:37:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-15 01:37:16,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:37:16,582 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:16,583 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:16,585 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:16,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:16,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1121179117, now seen corresponding path program 1 times [2019-10-15 01:37:16,600 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:16,600 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021846322] [2019-10-15 01:37:16,600 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:16,601 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:16,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:16,679 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:16,680 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664667260] [2019-10-15 01:37:16,680 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 [2019-10-15 01:37:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:16,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:16,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:37:16,804 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:37:16,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021846322] [2019-10-15 01:37:16,833 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:16,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664667260] [2019-10-15 01:37:16,835 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:16,835 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-15 01:37:16,835 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116917801] [2019-10-15 01:37:16,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:37:16,841 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:16,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:37:16,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:37:16,859 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-10-15 01:37:16,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:16,933 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-10-15 01:37:16,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:37:16,935 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-15 01:37:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:16,943 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:37:16,943 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:37:16,947 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:37:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:37:16,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 01:37:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:37:16,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-10-15 01:37:16,984 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 13 [2019-10-15 01:37:16,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:16,985 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-10-15 01:37:16,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:37:16,985 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-10-15 01:37:16,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:37:16,986 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:16,986 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:17,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:17,194 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:17,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:17,195 INFO L82 PathProgramCache]: Analyzing trace with hash 343234267, now seen corresponding path program 1 times [2019-10-15 01:37:17,195 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:17,196 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55160270] [2019-10-15 01:37:17,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:17,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:17,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:17,216 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:17,217 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28039867] [2019-10-15 01:37:17,217 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 [2019-10-15 01:37:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:17,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:17,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:37:17,318 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:37:17,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55160270] [2019-10-15 01:37:17,342 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:17,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28039867] [2019-10-15 01:37:17,342 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:17,343 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:37:17,343 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415061632] [2019-10-15 01:37:17,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:37:17,345 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:17,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:37:17,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:37:17,345 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 6 states. [2019-10-15 01:37:17,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:17,511 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2019-10-15 01:37:17,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:37:17,511 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-10-15 01:37:17,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:17,514 INFO L225 Difference]: With dead ends: 49 [2019-10-15 01:37:17,515 INFO L226 Difference]: Without dead ends: 34 [2019-10-15 01:37:17,516 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:37:17,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-15 01:37:17,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-10-15 01:37:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:37:17,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-10-15 01:37:17,541 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 17 [2019-10-15 01:37:17,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:17,541 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-10-15 01:37:17,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:37:17,542 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-10-15 01:37:17,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:37:17,544 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:17,544 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:17,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:17,756 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:17,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:17,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1084120933, now seen corresponding path program 1 times [2019-10-15 01:37:17,756 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:17,757 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771089150] [2019-10-15 01:37:17,757 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:17,757 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:17,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:17,767 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:17,767 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047545973] [2019-10-15 01:37:17,767 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 [2019-10-15 01:37:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:17,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:37:17,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:37:17,887 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:37:17,946 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771089150] [2019-10-15 01:37:17,947 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:17,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047545973] [2019-10-15 01:37:17,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [205573472] [2019-10-15 01:37:17,987 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:37:17,988 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:17,994 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:18,006 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:18,008 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:18,191 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:18,757 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-10-15 01:37:18,766 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:18,776 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:19,084 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:37:19,084 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 6] total 18 [2019-10-15 01:37:19,085 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629220209] [2019-10-15 01:37:19,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 01:37:19,086 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:19,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 01:37:19,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:37:19,087 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 10 states. [2019-10-15 01:37:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:19,497 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2019-10-15 01:37:19,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:37:19,497 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-10-15 01:37:19,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:19,498 INFO L225 Difference]: With dead ends: 50 [2019-10-15 01:37:19,499 INFO L226 Difference]: Without dead ends: 35 [2019-10-15 01:37:19,499 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:37:19,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-15 01:37:19,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-15 01:37:19,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 01:37:19,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-10-15 01:37:19,517 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 21 [2019-10-15 01:37:19,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:19,517 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-10-15 01:37:19,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 01:37:19,517 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-10-15 01:37:19,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:37:19,518 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:19,518 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:19,726 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:19,727 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:19,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:19,728 INFO L82 PathProgramCache]: Analyzing trace with hash 207754054, now seen corresponding path program 1 times [2019-10-15 01:37:19,728 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:19,729 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012753442] [2019-10-15 01:37:19,729 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:19,729 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:19,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:19,737 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:19,737 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256050729] [2019-10-15 01:37:19,738 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 [2019-10-15 01:37:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:19,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:37:19,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:37:19,822 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:37:19,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012753442] [2019-10-15 01:37:19,855 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:19,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256050729] [2019-10-15 01:37:19,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1388779681] [2019-10-15 01:37:19,858 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:37:19,858 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:19,859 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:19,860 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:19,860 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:19,906 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:20,363 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:37:20,377 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:20,382 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:20,974 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:20,975 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 14] total 24 [2019-10-15 01:37:20,975 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496448868] [2019-10-15 01:37:20,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 01:37:20,976 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:20,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 01:37:20,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:37:20,976 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 24 states. [2019-10-15 01:37:21,581 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-10-15 01:37:22,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:22,244 INFO L93 Difference]: Finished difference Result 86 states and 120 transitions. [2019-10-15 01:37:22,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:37:22,245 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 25 [2019-10-15 01:37:22,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:22,246 INFO L225 Difference]: With dead ends: 86 [2019-10-15 01:37:22,246 INFO L226 Difference]: Without dead ends: 62 [2019-10-15 01:37:22,249 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:37:22,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-15 01:37:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2019-10-15 01:37:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-15 01:37:22,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2019-10-15 01:37:22,277 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 25 [2019-10-15 01:37:22,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:22,278 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2019-10-15 01:37:22,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 01:37:22,278 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2019-10-15 01:37:22,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-15 01:37:22,279 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:22,280 INFO L380 BasicCegarLoop]: trace histogram [12, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:22,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:22,486 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:22,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:22,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1166771462, now seen corresponding path program 2 times [2019-10-15 01:37:22,487 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:22,488 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230830017] [2019-10-15 01:37:22,488 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:22,488 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:22,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:22,497 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:22,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129271531] [2019-10-15 01:37:22,498 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:22,554 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:37:22,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:22,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:37:22,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-10-15 01:37:22,583 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-10-15 01:37:22,607 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230830017] [2019-10-15 01:37:22,607 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:22,607 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129271531] [2019-10-15 01:37:22,608 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [44601973] [2019-10-15 01:37:22,609 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:37:22,609 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:22,610 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:22,610 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:22,610 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:22,630 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:23,000 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:37:23,014 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:23,021 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:23,537 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:23,537 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 14] total 22 [2019-10-15 01:37:23,537 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644756975] [2019-10-15 01:37:23,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:37:23,538 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:23,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:37:23,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:37:23,539 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 22 states. [2019-10-15 01:37:23,909 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2019-10-15 01:37:24,118 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2019-10-15 01:37:24,453 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2019-10-15 01:37:24,786 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-10-15 01:37:25,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:25,372 INFO L93 Difference]: Finished difference Result 191 states and 240 transitions. [2019-10-15 01:37:25,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:37:25,372 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2019-10-15 01:37:25,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:25,375 INFO L225 Difference]: With dead ends: 191 [2019-10-15 01:37:25,375 INFO L226 Difference]: Without dead ends: 165 [2019-10-15 01:37:25,377 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=297, Invalid=1185, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:37:25,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-10-15 01:37:25,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 81. [2019-10-15 01:37:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-15 01:37:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2019-10-15 01:37:25,399 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 37 [2019-10-15 01:37:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:25,400 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2019-10-15 01:37:25,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:37:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2019-10-15 01:37:25,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-15 01:37:25,402 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:25,402 INFO L380 BasicCegarLoop]: trace histogram [24, 12, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:25,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:25,607 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:25,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:25,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1713703481, now seen corresponding path program 3 times [2019-10-15 01:37:25,608 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:25,608 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413873050] [2019-10-15 01:37:25,609 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:25,609 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:25,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:25,617 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:25,618 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108807123] [2019-10-15 01:37:25,618 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:25,710 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:37:25,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:25,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 01:37:25,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 15 proven. 310 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2019-10-15 01:37:25,863 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 15 proven. 310 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2019-10-15 01:37:26,019 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413873050] [2019-10-15 01:37:26,019 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:26,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108807123] [2019-10-15 01:37:26,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1026993619] [2019-10-15 01:37:26,021 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:37:26,022 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:26,022 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:26,023 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:26,023 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:26,059 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:26,368 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:37:26,378 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:26,381 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:27,006 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:27,006 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2019-10-15 01:37:27,006 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644791561] [2019-10-15 01:37:27,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-15 01:37:27,008 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:27,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-15 01:37:27,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1333, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:37:27,009 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 40 states. [2019-10-15 01:37:30,559 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2019-10-15 01:37:31,043 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2019-10-15 01:37:32,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:32,509 INFO L93 Difference]: Finished difference Result 391 states and 496 transitions. [2019-10-15 01:37:32,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-10-15 01:37:32,509 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 61 [2019-10-15 01:37:32,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:32,515 INFO L225 Difference]: With dead ends: 391 [2019-10-15 01:37:32,515 INFO L226 Difference]: Without dead ends: 365 [2019-10-15 01:37:32,519 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3148 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1724, Invalid=7978, Unknown=0, NotChecked=0, Total=9702 [2019-10-15 01:37:32,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2019-10-15 01:37:32,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 106. [2019-10-15 01:37:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-15 01:37:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2019-10-15 01:37:32,553 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 61 [2019-10-15 01:37:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:32,554 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2019-10-15 01:37:32,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-15 01:37:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2019-10-15 01:37:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-15 01:37:32,555 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:32,556 INFO L380 BasicCegarLoop]: trace histogram [36, 12, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:32,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:32,760 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:32,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:32,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1482595171, now seen corresponding path program 4 times [2019-10-15 01:37:32,761 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:32,762 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301278104] [2019-10-15 01:37:32,762 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:32,762 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:32,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:32,771 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:32,771 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443839387] [2019-10-15 01:37:32,772 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:32,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:37:32,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked. [2019-10-15 01:37:32,998 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked. [2019-10-15 01:37:33,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301278104] [2019-10-15 01:37:33,081 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:33,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443839387] [2019-10-15 01:37:33,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1524474953] [2019-10-15 01:37:33,082 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:37:33,083 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:33,083 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:33,083 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:33,083 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:33,100 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:33,369 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:37:33,377 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:33,380 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:33,898 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:33,899 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14] total 32 [2019-10-15 01:37:33,899 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033125699] [2019-10-15 01:37:33,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-15 01:37:33,901 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:33,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-15 01:37:33,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:37:33,902 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand 32 states. [2019-10-15 01:37:35,066 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-10-15 01:37:36,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:36,059 INFO L93 Difference]: Finished difference Result 298 states and 421 transitions. [2019-10-15 01:37:36,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-15 01:37:36,060 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 77 [2019-10-15 01:37:36,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:36,062 INFO L225 Difference]: With dead ends: 298 [2019-10-15 01:37:36,062 INFO L226 Difference]: Without dead ends: 205 [2019-10-15 01:37:36,065 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=704, Invalid=2376, Unknown=0, NotChecked=0, Total=3080 [2019-10-15 01:37:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-10-15 01:37:36,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2019-10-15 01:37:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2019-10-15 01:37:36,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 226 transitions. [2019-10-15 01:37:36,097 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 226 transitions. Word has length 77 [2019-10-15 01:37:36,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:36,097 INFO L462 AbstractCegarLoop]: Abstraction has 201 states and 226 transitions. [2019-10-15 01:37:36,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-15 01:37:36,097 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 226 transitions. [2019-10-15 01:37:36,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-15 01:37:36,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:36,100 INFO L380 BasicCegarLoop]: trace histogram [98, 28, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:36,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:36,303 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:36,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:36,304 INFO L82 PathProgramCache]: Analyzing trace with hash 2101373704, now seen corresponding path program 5 times [2019-10-15 01:37:36,304 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:36,304 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535653003] [2019-10-15 01:37:36,305 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:36,305 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:36,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:36,315 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:36,315 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315899204] [2019-10-15 01:37:36,316 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:41,181 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-10-15 01:37:41,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:41,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-15 01:37:41,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5926 backedges. 227 proven. 105 refuted. 0 times theorem prover too weak. 5594 trivial. 0 not checked. [2019-10-15 01:37:41,434 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5926 backedges. 2 proven. 330 refuted. 0 times theorem prover too weak. 5594 trivial. 0 not checked. [2019-10-15 01:37:41,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535653003] [2019-10-15 01:37:41,706 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:41,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315899204] [2019-10-15 01:37:41,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [741102817] [2019-10-15 01:37:41,707 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:37:41,708 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:41,708 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:41,708 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:41,708 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:41,724 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:41,965 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:37:41,974 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:41,977 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:42,457 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:42,457 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 14] total 48 [2019-10-15 01:37:42,458 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004585254] [2019-10-15 01:37:42,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-10-15 01:37:42,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:42,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-10-15 01:37:42,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2019-10-15 01:37:42,461 INFO L87 Difference]: Start difference. First operand 201 states and 226 transitions. Second operand 48 states. [2019-10-15 01:37:44,852 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-10-15 01:37:46,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:46,701 INFO L93 Difference]: Finished difference Result 577 states and 803 transitions. [2019-10-15 01:37:46,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-15 01:37:46,701 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 157 [2019-10-15 01:37:46,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:46,706 INFO L225 Difference]: With dead ends: 577 [2019-10-15 01:37:46,706 INFO L226 Difference]: Without dead ends: 397 [2019-10-15 01:37:46,712 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2056, Invalid=5600, Unknown=0, NotChecked=0, Total=7656 [2019-10-15 01:37:46,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2019-10-15 01:37:46,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 393. [2019-10-15 01:37:46,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2019-10-15 01:37:46,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 434 transitions. [2019-10-15 01:37:46,764 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 434 transitions. Word has length 157 [2019-10-15 01:37:46,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:46,765 INFO L462 AbstractCegarLoop]: Abstraction has 393 states and 434 transitions. [2019-10-15 01:37:46,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-10-15 01:37:46,765 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 434 transitions. [2019-10-15 01:37:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2019-10-15 01:37:46,773 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:46,773 INFO L380 BasicCegarLoop]: trace histogram [210, 60, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:46,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:46,982 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:46,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:46,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1260267000, now seen corresponding path program 6 times [2019-10-15 01:37:46,983 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:46,984 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391538640] [2019-10-15 01:37:46,984 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:46,985 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:46,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:47,001 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:47,001 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921006346] [2019-10-15 01:37:47,002 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:47,292 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:37:47,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:47,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-15 01:37:47,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25358 backedges. 435 proven. 20239 refuted. 0 times theorem prover too weak. 4684 trivial. 0 not checked. [2019-10-15 01:37:48,651 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 25358 backedges. 435 proven. 20239 refuted. 0 times theorem prover too weak. 4684 trivial. 0 not checked. [2019-10-15 01:37:49,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391538640] [2019-10-15 01:37:49,627 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:49,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921006346] [2019-10-15 01:37:49,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [691925751] [2019-10-15 01:37:49,629 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:37:49,629 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:49,629 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:49,629 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:49,630 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:49,651 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:49,956 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:37:49,969 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:49,973 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:51,165 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:51,166 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 14] total 94 [2019-10-15 01:37:51,166 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425673932] [2019-10-15 01:37:51,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-10-15 01:37:51,168 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:51,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-10-15 01:37:51,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2243, Invalid=6499, Unknown=0, NotChecked=0, Total=8742 [2019-10-15 01:37:51,172 INFO L87 Difference]: Start difference. First operand 393 states and 434 transitions. Second operand 94 states.