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/init-non-constant-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:37:13,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:37:13,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:37:13,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:37:13,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:37:13,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:37:13,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:37:13,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:37:13,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:37:13,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:37:13,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:37:13,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:37:13,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:37:13,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:37:13,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:37:13,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:37:13,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:37:13,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:37:13,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:37:13,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:37:13,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:37:13,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:37:13,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:37:13,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:37:13,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:37:13,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:37:13,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:37:13,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:37:13,762 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 01:37:13,796 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:37:13,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:37:13,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:37:13,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:37:13,798 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:37:13,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:37:13,798 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:37:13,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:37:13,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:37:13,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:37:13,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:37:13,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:37:13,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:37:13,800 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:37:13,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:37:13,800 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:37:13,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:37:13,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:37:13,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:37:13,801 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:37:13,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:37:13,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:37:13,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:37:13,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:37:13,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:37:13,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:37:13,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:37:13,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:37:13,803 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 01:37:14,112 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:37:14,124 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:37:14,128 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:37:14,129 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:37:14,130 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:37:14,131 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-non-constant-2-n-u.c [2019-10-15 01:37:14,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3044a95eb/8664398e6fcf43b49663923f44fce007/FLAGb80038124 [2019-10-15 01:37:14,668 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:37:14,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-non-constant-2-n-u.c [2019-10-15 01:37:14,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3044a95eb/8664398e6fcf43b49663923f44fce007/FLAGb80038124 [2019-10-15 01:37:15,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3044a95eb/8664398e6fcf43b49663923f44fce007 [2019-10-15 01:37:15,047 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:37:15,049 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:37:15,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:15,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:37:15,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:37:15,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:15,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e54eee3 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 01:37:15,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:15" (1/1) ... [2019-10-15 01:37:15,065 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:37:15,087 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:37:15,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:15,272 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:37:15,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:15,315 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:37:15,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:15 WrapperNode [2019-10-15 01:37:15,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:15,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:37:15,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:37:15,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:37:15,415 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 01:37:15,415 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 01:37:15,421 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 01:37:15,422 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 01:37:15,432 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 01:37:15,438 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 01:37:15,439 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 01:37:15,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:37:15,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:37:15,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:37:15,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:37:15,443 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 01:37:15,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:37:15,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:37:15,496 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:37:15,496 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:37:15,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:37:15,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:37:15,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:37:15,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:37:15,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-15 01:37:15,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:37:15,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:37:15,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:37:15,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:37:15,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:37:15,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:37:15,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:37:15,819 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:37:15,820 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 01:37:15,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:15 BoogieIcfgContainer [2019-10-15 01:37:15,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:37:15,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:37:15,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:37:15,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:37:15,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:37:15" (1/3) ... [2019-10-15 01:37:15,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5632e873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:15, skipping insertion in model container [2019-10-15 01:37:15,827 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 01:37:15,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5632e873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:15, skipping insertion in model container [2019-10-15 01:37:15,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:15" (3/3) ... [2019-10-15 01:37:15,829 INFO L109 eAbstractionObserver]: Analyzing ICFG init-non-constant-2-n-u.c [2019-10-15 01:37:15,841 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:37:15,864 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:37:15,873 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:37:15,895 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:37:15,895 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:37:15,895 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:37:15,895 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:37:15,896 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:37:15,896 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:37:15,896 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:37:15,896 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:37:15,911 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 01:37:15,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:37:15,916 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:15,917 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:15,919 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:15,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:15,923 INFO L82 PathProgramCache]: Analyzing trace with hash 104319440, now seen corresponding path program 1 times [2019-10-15 01:37:15,930 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:15,930 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017028715] [2019-10-15 01:37:15,930 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:15,931 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:15,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:16,009 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:16,010 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175251715] [2019-10-15 01:37:16,010 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 01:37:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:16,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:37:16,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:16,164 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 01:37:16,164 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:16,194 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 01:37:16,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017028715] [2019-10-15 01:37:16,195 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:16,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175251715] [2019-10-15 01:37:16,196 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:16,197 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2019-10-15 01:37:16,197 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789186591] [2019-10-15 01:37:16,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:37:16,201 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:16,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:37:16,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:37:16,215 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2019-10-15 01:37:16,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:16,347 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2019-10-15 01:37:16,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:37:16,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-10-15 01:37:16,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:16,358 INFO L225 Difference]: With dead ends: 42 [2019-10-15 01:37:16,358 INFO L226 Difference]: Without dead ends: 23 [2019-10-15 01:37:16,362 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:37:16,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-15 01:37:16,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2019-10-15 01:37:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:37:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-10-15 01:37:16,400 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2019-10-15 01:37:16,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:16,401 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-10-15 01:37:16,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:37:16,402 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-10-15 01:37:16,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:37:16,402 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:16,403 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:16,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:16,612 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:16,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:16,614 INFO L82 PathProgramCache]: Analyzing trace with hash 718122281, now seen corresponding path program 1 times [2019-10-15 01:37:16,614 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:16,614 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254150429] [2019-10-15 01:37:16,615 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:16,615 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:16,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:16,626 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:16,626 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744697333] [2019-10-15 01:37:16,627 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 01:37:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:16,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:37:16,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:16,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:37:16,712 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:37:16,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254150429] [2019-10-15 01:37:16,742 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:16,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744697333] [2019-10-15 01:37:16,742 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:16,743 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2019-10-15 01:37:16,743 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787685619] [2019-10-15 01:37:16,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:37:16,745 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:16,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:37:16,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:37:16,746 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2019-10-15 01:37:16,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:16,880 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2019-10-15 01:37:16,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:37:16,881 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-10-15 01:37:16,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:16,882 INFO L225 Difference]: With dead ends: 41 [2019-10-15 01:37:16,882 INFO L226 Difference]: Without dead ends: 23 [2019-10-15 01:37:16,884 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:37:16,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-15 01:37:16,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-10-15 01:37:16,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:37:16,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-10-15 01:37:16,891 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2019-10-15 01:37:16,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:16,891 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-10-15 01:37:16,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:37:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-10-15 01:37:16,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:37:16,892 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:16,893 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:17,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:17,105 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:17,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:17,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1307047102, now seen corresponding path program 1 times [2019-10-15 01:37:17,107 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:17,108 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538248028] [2019-10-15 01:37:17,108 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:17,109 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:17,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:17,118 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:17,118 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642677244] [2019-10-15 01:37:17,119 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 01:37:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:17,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-15 01:37:17,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:17,292 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-15 01:37:17,292 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:37:17,296 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:37:17,296 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:37:17,297 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-10-15 01:37:17,362 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:37:17,362 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2019-10-15 01:37:17,364 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-15 01:37:17,386 INFO L567 ElimStorePlain]: treesize reduction 14, result has 41.7 percent of original size [2019-10-15 01:37:17,386 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:37:17,386 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:30, output treesize:10 [2019-10-15 01:37:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:37:17,433 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:17,584 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2019-10-15 01:37:17,590 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2019-10-15 01:37:17,592 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:37:17,610 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:37:17,611 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 01:37:17,628 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:37:17,629 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:37:17,630 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:37:17,635 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:37:17,637 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-10-15 01:37:17,637 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:26, output treesize:45 [2019-10-15 01:37:17,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:37:17,638 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:37:17,638 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:37:24,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:37:24,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:37:24,256 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:37:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:37:24,315 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538248028] [2019-10-15 01:37:24,316 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:24,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642677244] [2019-10-15 01:37:24,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915172652] [2019-10-15 01:37:24,351 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:37:24,351 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:24,369 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:24,378 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:24,378 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:24,531 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:25,274 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-10-15 01:37:25,286 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:25,292 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:25,796 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2019-10-15 01:37:25,992 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 30 [2019-10-15 01:37:26,280 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2019-10-15 01:37:26,507 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 30 [2019-10-15 01:37:26,783 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:26,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12] total 29 [2019-10-15 01:37:26,784 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584156006] [2019-10-15 01:37:26,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-15 01:37:26,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:26,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-15 01:37:26,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=712, Unknown=4, NotChecked=0, Total=812 [2019-10-15 01:37:26,787 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 29 states. [2019-10-15 01:37:27,124 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2019-10-15 01:37:27,348 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2019-10-15 01:37:27,666 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2019-10-15 01:37:29,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:29,010 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-10-15 01:37:29,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:37:29,010 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 15 [2019-10-15 01:37:29,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:29,011 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:37:29,012 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 01:37:29,013 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=281, Invalid=1695, Unknown=4, NotChecked=0, Total=1980 [2019-10-15 01:37:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 01:37:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2019-10-15 01:37:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:37:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-15 01:37:29,021 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 15 [2019-10-15 01:37:29,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:29,022 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-15 01:37:29,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-15 01:37:29,022 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-15 01:37:29,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 01:37:29,024 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:29,024 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:29,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:29,228 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:29,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:29,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2012600320, now seen corresponding path program 1 times [2019-10-15 01:37:29,229 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:29,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785706623] [2019-10-15 01:37:29,230 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:29,230 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:29,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:29,238 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:29,238 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420443767] [2019-10-15 01:37:29,238 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 01:37:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:29,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:37:29,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:37:29,348 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:37:29,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785706623] [2019-10-15 01:37:29,390 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:29,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420443767] [2019-10-15 01:37:29,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [832312339] [2019-10-15 01:37:29,392 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:37:29,392 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:29,392 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:29,393 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:29,393 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:29,429 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:30,553 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-10-15 01:37:30,580 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:30,586 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:30,943 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2019-10-15 01:37:31,338 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2019-10-15 01:37:31,509 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 28 [2019-10-15 01:37:31,892 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:31,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 14] total 23 [2019-10-15 01:37:31,893 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589090555] [2019-10-15 01:37:31,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:37:31,895 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:31,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:37:31,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:37:31,896 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 23 states. [2019-10-15 01:37:32,219 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2019-10-15 01:37:32,448 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2019-10-15 01:37:32,736 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2019-10-15 01:37:32,956 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 32 [2019-10-15 01:37:33,231 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2019-10-15 01:37:33,674 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 40 [2019-10-15 01:37:34,089 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 39 [2019-10-15 01:37:34,517 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 46 [2019-10-15 01:37:36,936 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2019-10-15 01:37:43,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:43,651 INFO L93 Difference]: Finished difference Result 81 states and 105 transitions. [2019-10-15 01:37:43,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-15 01:37:43,652 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2019-10-15 01:37:43,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:43,655 INFO L225 Difference]: With dead ends: 81 [2019-10-15 01:37:43,655 INFO L226 Difference]: Without dead ends: 62 [2019-10-15 01:37:43,657 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=413, Invalid=2137, Unknown=0, NotChecked=0, Total=2550 [2019-10-15 01:37:43,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-15 01:37:43,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2019-10-15 01:37:43,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-15 01:37:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2019-10-15 01:37:43,672 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 22 [2019-10-15 01:37:43,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:43,672 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2019-10-15 01:37:43,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:37:43,672 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2019-10-15 01:37:43,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 01:37:43,673 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:43,673 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:43,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:43,875 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:43,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:43,875 INFO L82 PathProgramCache]: Analyzing trace with hash 665696917, now seen corresponding path program 2 times [2019-10-15 01:37:43,876 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:43,876 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519744513] [2019-10-15 01:37:43,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:43,877 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:43,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:43,883 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:43,883 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940193801] [2019-10-15 01:37:43,884 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 01:37:43,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:37:43,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:43,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:37:43,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:37:44,084 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:37:44,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519744513] [2019-10-15 01:37:44,291 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:44,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940193801] [2019-10-15 01:37:44,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1077637950] [2019-10-15 01:37:44,293 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:37:44,293 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:44,293 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:44,293 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:44,294 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:44,324 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:44,989 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-10-15 01:37:45,000 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:45,003 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:45,434 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2019-10-15 01:37:45,589 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 30 [2019-10-15 01:37:45,823 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2019-10-15 01:37:46,410 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:46,411 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 33 [2019-10-15 01:37:46,411 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158803272] [2019-10-15 01:37:46,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-15 01:37:46,412 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:46,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-15 01:37:46,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 01:37:46,413 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 33 states. [2019-10-15 01:37:46,755 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2019-10-15 01:37:46,971 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2019-10-15 01:37:47,273 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2019-10-15 01:37:47,793 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2019-10-15 01:37:48,224 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2019-10-15 01:37:48,500 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2019-10-15 01:37:55,509 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 46 [2019-10-15 01:37:57,960 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50