/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/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/transpose-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:30:42,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:30:42,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:30:42,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:30:42,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:30:42,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:30:42,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:30:42,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:30:42,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:30:42,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:30:42,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:30:42,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:30:42,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:30:42,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:30:42,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:30:42,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:30:42,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:30:42,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:30:42,100 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:30:42,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:30:42,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:30:42,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:30:42,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:30:42,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:30:42,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:30:42,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:30:42,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:30:42,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:30:42,131 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 [2019-11-07 01:30:42,160 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:30:42,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:30:42,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:30:42,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:30:42,165 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:30:42,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:30:42,165 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:30:42,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:30:42,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:30:42,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:30:42,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:30:42,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:30:42,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:30:42,169 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:30:42,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:30:42,169 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:30:42,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:30:42,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:30:42,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:30:42,171 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:30:42,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:30:42,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:30:42,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:30:42,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:30:42,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:30:42,174 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:30:42,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:30:42,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:30:42,175 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 [2019-11-07 01:30:42,486 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:30:42,506 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:30:42,510 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:30:42,512 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:30:42,512 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:30:42,514 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/transpose-u.c [2019-11-07 01:30:42,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8382686a4/8f2bc04cc49249b9937b1d63e8fbc04c/FLAG818665191 [2019-11-07 01:30:43,008 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:30:43,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/transpose-u.c [2019-11-07 01:30:43,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8382686a4/8f2bc04cc49249b9937b1d63e8fbc04c/FLAG818665191 [2019-11-07 01:30:43,398 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8382686a4/8f2bc04cc49249b9937b1d63e8fbc04c [2019-11-07 01:30:43,407 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:30:43,409 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:30:43,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:30:43,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:30:43,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:30:43,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:43" (1/1) ... [2019-11-07 01:30:43,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26837b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:43, skipping insertion in model container [2019-11-07 01:30:43,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:43" (1/1) ... [2019-11-07 01:30:43,428 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:30:43,445 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:30:43,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:30:43,630 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:30:43,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:30:43,696 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:30:43,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:43 WrapperNode [2019-11-07 01:30:43,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:30:43,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:30:43,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:30:43,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:30:43,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:43" (1/1) ... [2019-11-07 01:30:43,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:43" (1/1) ... [2019-11-07 01:30:43,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:43" (1/1) ... [2019-11-07 01:30:43,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:43" (1/1) ... [2019-11-07 01:30:43,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:43" (1/1) ... [2019-11-07 01:30:43,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:43" (1/1) ... [2019-11-07 01:30:43,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:43" (1/1) ... [2019-11-07 01:30:43,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:30:43,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:30:43,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:30:43,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:30:43,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:43" (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 [2019-11-07 01:30:43,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:30:43,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:30:43,877 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:30:43,877 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:30:43,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:30:43,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:30:43,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:30:43,878 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:30:43,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:30:43,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:30:43,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:30:43,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:30:43,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:30:43,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:30:44,286 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:30:44,287 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-07 01:30:44,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:44 BoogieIcfgContainer [2019-11-07 01:30:44,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:30:44,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:30:44,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:30:44,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:30:44,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:30:43" (1/3) ... [2019-11-07 01:30:44,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b57c4cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:44, skipping insertion in model container [2019-11-07 01:30:44,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:43" (2/3) ... [2019-11-07 01:30:44,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b57c4cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:44, skipping insertion in model container [2019-11-07 01:30:44,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:44" (3/3) ... [2019-11-07 01:30:44,296 INFO L109 eAbstractionObserver]: Analyzing ICFG transpose-u.c [2019-11-07 01:30:44,303 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:30:44,310 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:30:44,321 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:30:44,346 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:30:44,346 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:30:44,346 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:30:44,347 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:30:44,347 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:30:44,347 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:30:44,347 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:30:44,347 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:30:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-07 01:30:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:30:44,372 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:44,373 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:44,375 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:44,381 INFO L82 PathProgramCache]: Analyzing trace with hash -600979783, now seen corresponding path program 1 times [2019-11-07 01:30:44,388 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:44,389 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708339970] [2019-11-07 01:30:44,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:44,469 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:44,469 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395396807] [2019-11-07 01:30:44,470 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 [2019-11-07 01:30:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:30:44,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:30:44,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:30:44,602 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:30:44,630 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708339970] [2019-11-07 01:30:44,630 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:44,631 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395396807] [2019-11-07 01:30:44,632 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:30:44,632 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-07 01:30:44,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830666105] [2019-11-07 01:30:44,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:30:44,639 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:44,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:30:44,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:30:44,658 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-11-07 01:30:44,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:44,747 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-11-07 01:30:44,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:30:44,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-07 01:30:44,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:44,760 INFO L225 Difference]: With dead ends: 40 [2019-11-07 01:30:44,761 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 01:30:44,765 INFO L630 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 [2019-11-07 01:30:44,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 01:30:44,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 01:30:44,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 01:30:44,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-11-07 01:30:44,810 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 13 [2019-11-07 01:30:44,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:44,811 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-11-07 01:30:44,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:30:44,811 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-11-07 01:30:44,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-07 01:30:44,812 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:44,812 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:45,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:45,018 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:45,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:45,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1647580097, now seen corresponding path program 1 times [2019-11-07 01:30:45,020 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:45,021 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014260566] [2019-11-07 01:30:45,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:45,062 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:45,063 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857130197] [2019-11-07 01:30:45,063 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 [2019-11-07 01:30:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:30:45,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:30:45,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:30:45,218 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:30:45,252 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014260566] [2019-11-07 01:30:45,253 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:45,253 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857130197] [2019-11-07 01:30:45,253 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:30:45,253 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-07 01:30:45,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083786016] [2019-11-07 01:30:45,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:30:45,256 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:45,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:30:45,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:30:45,257 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 6 states. [2019-11-07 01:30:45,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:45,380 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2019-11-07 01:30:45,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:30:45,380 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-07 01:30:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:45,384 INFO L225 Difference]: With dead ends: 49 [2019-11-07 01:30:45,384 INFO L226 Difference]: Without dead ends: 34 [2019-11-07 01:30:45,386 INFO L630 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 [2019-11-07 01:30:45,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-07 01:30:45,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-11-07 01:30:45,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-07 01:30:45,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-11-07 01:30:45,415 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 17 [2019-11-07 01:30:45,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:45,419 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-11-07 01:30:45,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:30:45,419 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-11-07 01:30:45,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-07 01:30:45,421 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:45,421 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:45,633 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:45,634 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:45,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:45,635 INFO L82 PathProgramCache]: Analyzing trace with hash -138663743, now seen corresponding path program 1 times [2019-11-07 01:30:45,635 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:45,637 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069548306] [2019-11-07 01:30:45,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:45,677 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:45,677 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877199809] [2019-11-07 01:30:45,685 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 [2019-11-07 01:30:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:30:45,789 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:30:45,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:30:45,835 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:30:45,897 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069548306] [2019-11-07 01:30:45,898 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:45,899 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877199809] [2019-11-07 01:30:45,899 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1641484778] [2019-11-07 01:30:45,946 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-07 01:30:45,946 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:30:45,957 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:30:45,963 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:30:45,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:30:46,097 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:30:46,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:30:46,436 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:30:46,720 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2019-11-07 01:30:46,761 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:30:46,761 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 6] total 17 [2019-11-07 01:30:46,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124031169] [2019-11-07 01:30:46,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 01:30:46,764 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:46,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 01:30:46,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:30:46,765 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2019-11-07 01:30:46,996 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2019-11-07 01:30:47,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:47,189 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2019-11-07 01:30:47,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 01:30:47,190 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-11-07 01:30:47,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:47,191 INFO L225 Difference]: With dead ends: 49 [2019-11-07 01:30:47,191 INFO L226 Difference]: Without dead ends: 34 [2019-11-07 01:30:47,191 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2019-11-07 01:30:47,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-07 01:30:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-07 01:30:47,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-07 01:30:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-11-07 01:30:47,201 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 21 [2019-11-07 01:30:47,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:47,202 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-11-07 01:30:47,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 01:30:47,202 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-11-07 01:30:47,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 01:30:47,203 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:47,203 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:47,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:47,406 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:47,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1843891786, now seen corresponding path program 1 times [2019-11-07 01:30:47,407 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:47,407 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465595063] [2019-11-07 01:30:47,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:47,421 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:47,422 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897180778] [2019-11-07 01:30:47,422 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 [2019-11-07 01:30:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:30:47,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:30:47,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:30:47,513 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:30:47,568 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465595063] [2019-11-07 01:30:47,569 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:47,569 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897180778] [2019-11-07 01:30:47,569 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1186816840] [2019-11-07 01:30:47,571 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:30:47,572 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:30:47,572 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:30:47,572 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:30:47,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:30:47,599 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:30:47,853 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:30:47,935 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:30:47,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:30:47,955 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:30:48,249 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2019-11-07 01:30:48,546 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:30:48,547 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 14] total 23 [2019-11-07 01:30:48,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78636746] [2019-11-07 01:30:48,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:30:48,548 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:48,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:30:48,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:30:48,549 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 23 states. [2019-11-07 01:30:48,742 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2019-11-07 01:30:49,562 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2019-11-07 01:30:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:50,227 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2019-11-07 01:30:50,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-07 01:30:50,228 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2019-11-07 01:30:50,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:50,229 INFO L225 Difference]: With dead ends: 92 [2019-11-07 01:30:50,229 INFO L226 Difference]: Without dead ends: 68 [2019-11-07 01:30:50,231 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=391, Invalid=1679, Unknown=0, NotChecked=0, Total=2070 [2019-11-07 01:30:50,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-07 01:30:50,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2019-11-07 01:30:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-07 01:30:50,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2019-11-07 01:30:50,259 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 25 [2019-11-07 01:30:50,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:50,261 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2019-11-07 01:30:50,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:30:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2019-11-07 01:30:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-07 01:30:50,268 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:50,268 INFO L410 BasicCegarLoop]: trace histogram [12, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:50,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:50,481 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:50,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:50,483 INFO L82 PathProgramCache]: Analyzing trace with hash -687814538, now seen corresponding path program 2 times [2019-11-07 01:30:50,483 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:50,483 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311493991] [2019-11-07 01:30:50,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:50,493 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:50,493 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367638495] [2019-11-07 01:30:50,493 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 [2019-11-07 01:30:50,558 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:30:50,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:30:50,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:30:50,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:50,582 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-07 01:30:50,583 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-07 01:30:50,611 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311493991] [2019-11-07 01:30:50,611 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:50,611 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367638495] [2019-11-07 01:30:50,611 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1788067675] [2019-11-07 01:30:50,613 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:30:50,613 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:30:50,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:30:50,614 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:30:50,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:30:50,638 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:30:50,840 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:30:50,901 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:30:50,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:30:50,909 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:30:51,148 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2019-11-07 01:30:51,405 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:30:51,405 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 14] total 21 [2019-11-07 01:30:51,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870225956] [2019-11-07 01:30:51,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-07 01:30:51,407 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:51,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-07 01:30:51,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2019-11-07 01:30:51,409 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 21 states. [2019-11-07 01:30:51,637 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2019-11-07 01:30:51,853 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2019-11-07 01:30:52,044 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2019-11-07 01:30:52,240 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2019-11-07 01:30:52,446 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2019-11-07 01:30:52,755 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2019-11-07 01:30:53,070 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2019-11-07 01:30:53,369 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2019-11-07 01:30:53,617 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2019-11-07 01:30:54,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:54,137 INFO L93 Difference]: Finished difference Result 206 states and 256 transitions. [2019-11-07 01:30:54,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-07 01:30:54,138 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2019-11-07 01:30:54,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:54,140 INFO L225 Difference]: With dead ends: 206 [2019-11-07 01:30:54,140 INFO L226 Difference]: Without dead ends: 164 [2019-11-07 01:30:54,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=379, Invalid=1601, Unknown=0, NotChecked=0, Total=1980 [2019-11-07 01:30:54,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-07 01:30:54,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 104. [2019-11-07 01:30:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-07 01:30:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 121 transitions. [2019-11-07 01:30:54,167 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 121 transitions. Word has length 37 [2019-11-07 01:30:54,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:54,168 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 121 transitions. [2019-11-07 01:30:54,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-07 01:30:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 121 transitions. [2019-11-07 01:30:54,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-07 01:30:54,170 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:54,171 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:54,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:54,375 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:54,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:54,376 INFO L82 PathProgramCache]: Analyzing trace with hash -2073630819, now seen corresponding path program 3 times [2019-11-07 01:30:54,377 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:54,377 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485247768] [2019-11-07 01:30:54,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:54,413 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:54,413 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7224438] [2019-11-07 01:30:54,414 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 [2019-11-07 01:30:54,535 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:30:54,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:30:54,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-07 01:30:54,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 15 proven. 310 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2019-11-07 01:30:54,657 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 15 proven. 310 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2019-11-07 01:30:54,811 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485247768] [2019-11-07 01:30:54,811 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:54,811 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7224438] [2019-11-07 01:30:54,811 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1105820209] [2019-11-07 01:30:54,815 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:30:54,815 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:30:54,816 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:30:54,816 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:30:54,816 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:30:54,835 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:30:55,153 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:30:55,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:30:55,162 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:30:55,469 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2019-11-07 01:30:55,811 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:30:55,812 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2019-11-07 01:30:55,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203045264] [2019-11-07 01:30:55,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-07 01:30:55,814 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:55,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-07 01:30:55,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2019-11-07 01:30:55,815 INFO L87 Difference]: Start difference. First operand 104 states and 121 transitions. Second operand 39 states. [2019-11-07 01:30:56,026 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2019-11-07 01:30:56,417 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2019-11-07 01:30:56,759 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2019-11-07 01:30:56,974 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2019-11-07 01:30:57,208 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2019-11-07 01:30:57,420 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2019-11-07 01:30:57,674 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2019-11-07 01:31:00,484 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2019-11-07 01:31:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:31:01,927 INFO L93 Difference]: Finished difference Result 390 states and 489 transitions. [2019-11-07 01:31:01,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-11-07 01:31:01,928 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2019-11-07 01:31:01,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:31:01,932 INFO L225 Difference]: With dead ends: 390 [2019-11-07 01:31:01,932 INFO L226 Difference]: Without dead ends: 324 [2019-11-07 01:31:01,938 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3859 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1907, Invalid=9865, Unknown=0, NotChecked=0, Total=11772 [2019-11-07 01:31:01,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2019-11-07 01:31:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 145. [2019-11-07 01:31:02,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-11-07 01:31:02,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2019-11-07 01:31:02,025 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 77 [2019-11-07 01:31:02,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:31:02,025 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2019-11-07 01:31:02,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-07 01:31:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2019-11-07 01:31:02,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-07 01:31:02,027 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:02,028 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:02,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:31:02,231 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:02,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1656853007, now seen corresponding path program 4 times [2019-11-07 01:31:02,232 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:02,232 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959743816] [2019-11-07 01:31:02,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:02,261 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:31:02,261 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626953757] [2019-11-07 01:31:02,262 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 [2019-11-07 01:31:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:02,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 01:31:02,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:31:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 1492 trivial. 0 not checked. [2019-11-07 01:31:02,564 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:31:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 1492 trivial. 0 not checked. [2019-11-07 01:31:02,653 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959743816] [2019-11-07 01:31:02,653 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:31:02,653 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626953757] [2019-11-07 01:31:02,653 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1238959663] [2019-11-07 01:31:02,655 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:31:02,656 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:31:02,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:31:02,656 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:31:02,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:31:02,677 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:31:02,919 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:31:02,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:31:02,929 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:31:03,156 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2019-11-07 01:31:03,398 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:31:03,398 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14] total 31 [2019-11-07 01:31:03,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102146743] [2019-11-07 01:31:03,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-07 01:31:03,400 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:31:03,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-07 01:31:03,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2019-11-07 01:31:03,403 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand 31 states. [2019-11-07 01:31:03,633 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2019-11-07 01:31:05,245 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2019-11-07 01:31:06,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:31:06,126 INFO L93 Difference]: Finished difference Result 407 states and 570 transitions. [2019-11-07 01:31:06,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-07 01:31:06,126 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 109 [2019-11-07 01:31:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:31:06,129 INFO L225 Difference]: With dead ends: 407 [2019-11-07 01:31:06,129 INFO L226 Difference]: Without dead ends: 275 [2019-11-07 01:31:06,133 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1055, Invalid=3775, Unknown=0, NotChecked=0, Total=4830 [2019-11-07 01:31:06,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-11-07 01:31:06,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 272. [2019-11-07 01:31:06,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2019-11-07 01:31:06,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 302 transitions. [2019-11-07 01:31:06,167 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 302 transitions. Word has length 109 [2019-11-07 01:31:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:31:06,167 INFO L462 AbstractCegarLoop]: Abstraction has 272 states and 302 transitions. [2019-11-07 01:31:06,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-07 01:31:06,168 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 302 transitions. [2019-11-07 01:31:06,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-11-07 01:31:06,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:06,171 INFO L410 BasicCegarLoop]: trace histogram [98, 84, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:06,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:31:06,375 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:06,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:06,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1014685884, now seen corresponding path program 5 times [2019-11-07 01:31:06,376 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:06,376 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606250009] [2019-11-07 01:31:06,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:06,391 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:31:06,391 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959929896] [2019-11-07 01:31:06,391 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