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-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:37:08,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:37:08,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:37:08,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:37:08,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:37:08,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:37:08,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:37:08,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:37:08,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:37:08,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:37:08,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:37:08,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:37:08,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:37:08,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:37:08,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:37:08,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:37:08,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:37:08,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:37:08,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:37:08,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:37:08,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:37:08,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:37:08,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:37:08,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:37:08,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:37:08,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:37:08,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:37:08,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:37:08,230 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 01:37:08,265 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:37:08,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:37:08,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:37:08,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:37:08,269 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:37:08,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:37:08,270 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:37:08,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:37:08,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:37:08,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:37:08,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:37:08,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:37:08,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:37:08,272 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:37:08,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:37:08,273 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:37:08,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:37:08,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:37:08,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:37:08,274 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:37:08,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:37:08,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:37:08,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:37:08,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:37:08,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:37:08,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:37:08,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:37:08,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:37:08,276 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 01:37:08,557 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:37:08,575 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:37:08,580 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:37:08,581 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:37:08,582 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:37:08,583 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-3-u.c [2019-10-15 01:37:08,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1ddfc493/c272d729c3af40ae952523e4dd226db7/FLAG570da5d26 [2019-10-15 01:37:09,130 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:37:09,131 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-3-u.c [2019-10-15 01:37:09,139 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1ddfc493/c272d729c3af40ae952523e4dd226db7/FLAG570da5d26 [2019-10-15 01:37:09,522 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1ddfc493/c272d729c3af40ae952523e4dd226db7 [2019-10-15 01:37:09,533 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:37:09,535 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:37:09,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:09,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:37:09,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:37:09,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:09" (1/1) ... [2019-10-15 01:37:09,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e5f6572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:09, skipping insertion in model container [2019-10-15 01:37:09,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:09" (1/1) ... [2019-10-15 01:37:09,559 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:37:09,581 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:37:09,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:09,759 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:37:09,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:09,802 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:37:09,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:09 WrapperNode [2019-10-15 01:37:09,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:09,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:37:09,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:37:09,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:37:09,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:09" (1/1) ... [2019-10-15 01:37:09,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:09" (1/1) ... [2019-10-15 01:37:09,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:09" (1/1) ... [2019-10-15 01:37:09,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:09" (1/1) ... [2019-10-15 01:37:09,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:09" (1/1) ... [2019-10-15 01:37:09,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:09" (1/1) ... [2019-10-15 01:37:09,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:09" (1/1) ... [2019-10-15 01:37:09,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:37:09,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:37:09,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:37:09,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:37:09,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:09" (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 01:37:10,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:37:10,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:37:10,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:37:10,003 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:37:10,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:37:10,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:37:10,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:37:10,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:37:10,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:37:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:37:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:37:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:37:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:37:10,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:37:10,382 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:37:10,382 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-15 01:37:10,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:10 BoogieIcfgContainer [2019-10-15 01:37:10,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:37:10,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:37:10,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:37:10,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:37:10,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:37:09" (1/3) ... [2019-10-15 01:37:10,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7d1d7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:10, skipping insertion in model container [2019-10-15 01:37:10,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:09" (2/3) ... [2019-10-15 01:37:10,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7d1d7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:10, skipping insertion in model container [2019-10-15 01:37:10,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:10" (3/3) ... [2019-10-15 01:37:10,394 INFO L109 eAbstractionObserver]: Analyzing ICFG init-3-u.c [2019-10-15 01:37:10,404 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:37:10,412 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:37:10,424 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:37:10,466 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:37:10,466 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:37:10,467 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:37:10,467 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:37:10,467 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:37:10,467 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:37:10,467 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:37:10,467 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:37:10,482 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-15 01:37:10,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:37:10,488 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:10,489 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:10,491 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:10,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:10,496 INFO L82 PathProgramCache]: Analyzing trace with hash 304177849, now seen corresponding path program 1 times [2019-10-15 01:37:10,505 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:10,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669511491] [2019-10-15 01:37:10,505 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:10,506 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:10,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:10,588 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:10,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359576644] [2019-10-15 01:37:10,589 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 01:37:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:10,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:10,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:10,727 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 01:37:10,728 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:10,793 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 01:37:10,793 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669511491] [2019-10-15 01:37:10,794 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:10,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359576644] [2019-10-15 01:37:10,796 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:10,796 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-15 01:37:10,797 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83204342] [2019-10-15 01:37:10,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:37:10,805 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:10,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:37:10,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:37:10,831 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-10-15 01:37:10,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:10,971 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-10-15 01:37:10,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:37:10,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-15 01:37:10,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:10,995 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:37:10,995 INFO L226 Difference]: Without dead ends: 23 [2019-10-15 01:37:11,001 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:37:11,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-15 01:37:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-15 01:37:11,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-15 01:37:11,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2019-10-15 01:37:11,061 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 13 [2019-10-15 01:37:11,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:11,063 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2019-10-15 01:37:11,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:37:11,063 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2019-10-15 01:37:11,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:37:11,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:11,067 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:11,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:11,272 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:11,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:11,273 INFO L82 PathProgramCache]: Analyzing trace with hash 362677943, now seen corresponding path program 1 times [2019-10-15 01:37:11,273 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:11,274 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674808140] [2019-10-15 01:37:11,274 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:11,274 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:11,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:11,293 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:11,293 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060820009] [2019-10-15 01:37:11,294 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 01:37:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:11,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:11,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:37:11,394 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:37:11,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674808140] [2019-10-15 01:37:11,424 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:11,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060820009] [2019-10-15 01:37:11,425 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:11,425 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:37:11,425 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107936935] [2019-10-15 01:37:11,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:37:11,427 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:11,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:37:11,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:37:11,428 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 6 states. [2019-10-15 01:37:11,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:11,574 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2019-10-15 01:37:11,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:37:11,576 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-10-15 01:37:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:11,579 INFO L225 Difference]: With dead ends: 50 [2019-10-15 01:37:11,580 INFO L226 Difference]: Without dead ends: 35 [2019-10-15 01:37:11,582 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:37:11,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-15 01:37:11,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-15 01:37:11,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-15 01:37:11,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2019-10-15 01:37:11,598 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 17 [2019-10-15 01:37:11,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:11,598 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2019-10-15 01:37:11,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:37:11,599 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2019-10-15 01:37:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:37:11,600 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:11,600 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:11,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:11,813 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:11,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:11,815 INFO L82 PathProgramCache]: Analyzing trace with hash 421607751, now seen corresponding path program 1 times [2019-10-15 01:37:11,815 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:11,816 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394000110] [2019-10-15 01:37:11,816 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:11,817 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:11,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:11,828 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:11,829 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541564493] [2019-10-15 01:37:11,829 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 01:37:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:11,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:11,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:37:11,939 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:37:11,965 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394000110] [2019-10-15 01:37:11,965 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:11,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541564493] [2019-10-15 01:37:11,966 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:11,966 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:37:11,966 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031600363] [2019-10-15 01:37:11,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:37:11,967 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:11,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:37:11,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:37:11,968 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 6 states. [2019-10-15 01:37:12,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:12,053 INFO L93 Difference]: Finished difference Result 77 states and 112 transitions. [2019-10-15 01:37:12,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:37:12,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-10-15 01:37:12,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:12,055 INFO L225 Difference]: With dead ends: 77 [2019-10-15 01:37:12,056 INFO L226 Difference]: Without dead ends: 51 [2019-10-15 01:37:12,056 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:37:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-15 01:37:12,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-10-15 01:37:12,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-15 01:37:12,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2019-10-15 01:37:12,069 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 25 [2019-10-15 01:37:12,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:12,070 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2019-10-15 01:37:12,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:37:12,070 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2019-10-15 01:37:12,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 01:37:12,071 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:12,071 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:12,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:12,275 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:12,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:12,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2016507335, now seen corresponding path program 1 times [2019-10-15 01:37:12,276 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:12,277 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786295707] [2019-10-15 01:37:12,277 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:12,278 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:12,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:12,287 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:12,287 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575559346] [2019-10-15 01:37:12,287 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 01:37:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:12,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:37:12,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-15 01:37:12,389 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-15 01:37:12,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786295707] [2019-10-15 01:37:12,440 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:12,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575559346] [2019-10-15 01:37:12,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1888707927] [2019-10-15 01:37:12,468 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:37:12,468 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:12,475 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:12,483 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:12,484 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:12,689 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:15,032 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2019-10-15 01:37:15,047 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:15,051 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:15,547 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2019-10-15 01:37:15,950 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:15,950 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 12] total 22 [2019-10-15 01:37:15,950 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212353537] [2019-10-15 01:37:15,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:37:15,952 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:15,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:37:15,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:37:15,953 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand 22 states. [2019-10-15 01:37:16,673 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2019-10-15 01:37:17,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:17,556 INFO L93 Difference]: Finished difference Result 141 states and 198 transitions. [2019-10-15 01:37:17,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:37:17,557 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2019-10-15 01:37:17,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:17,559 INFO L225 Difference]: With dead ends: 141 [2019-10-15 01:37:17,559 INFO L226 Difference]: Without dead ends: 101 [2019-10-15 01:37:17,560 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=326, Invalid=1080, Unknown=0, NotChecked=0, Total=1406 [2019-10-15 01:37:17,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-15 01:37:17,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2019-10-15 01:37:17,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-15 01:37:17,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2019-10-15 01:37:17,607 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 33 [2019-10-15 01:37:17,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:17,607 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2019-10-15 01:37:17,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:37:17,607 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2019-10-15 01:37:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 01:37:17,612 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:17,612 INFO L380 BasicCegarLoop]: trace histogram [24, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:17,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:17,821 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:17,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:17,822 INFO L82 PathProgramCache]: Analyzing trace with hash -130175289, now seen corresponding path program 2 times [2019-10-15 01:37:17,822 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:17,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787234315] [2019-10-15 01:37:17,823 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:17,823 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:17,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:17,834 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:17,834 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348861167] [2019-10-15 01:37:17,834 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 01:37:18,025 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-15 01:37:18,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:18,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:37:18,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 154 proven. 21 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2019-10-15 01:37:18,124 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 7 proven. 168 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2019-10-15 01:37:18,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787234315] [2019-10-15 01:37:18,252 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:18,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348861167] [2019-10-15 01:37:18,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1899070831] [2019-10-15 01:37:18,255 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:37:18,255 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:18,256 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:18,256 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:18,256 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:18,300 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:19,977 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2019-10-15 01:37:19,985 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:19,989 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:20,435 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2019-10-15 01:37:20,805 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:20,805 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12] total 30 [2019-10-15 01:37:20,806 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966220781] [2019-10-15 01:37:20,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-15 01:37:20,807 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:20,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-15 01:37:20,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2019-10-15 01:37:20,812 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 30 states. [2019-10-15 01:37:22,222 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2019-10-15 01:37:22,530 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2019-10-15 01:37:23,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:23,456 INFO L93 Difference]: Finished difference Result 265 states and 371 transitions. [2019-10-15 01:37:23,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-15 01:37:23,464 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 49 [2019-10-15 01:37:23,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:23,466 INFO L225 Difference]: With dead ends: 265 [2019-10-15 01:37:23,466 INFO L226 Difference]: Without dead ends: 181 [2019-10-15 01:37:23,469 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=722, Invalid=2140, Unknown=0, NotChecked=0, Total=2862 [2019-10-15 01:37:23,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-10-15 01:37:23,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2019-10-15 01:37:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-10-15 01:37:23,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 216 transitions. [2019-10-15 01:37:23,512 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 216 transitions. Word has length 49 [2019-10-15 01:37:23,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:23,512 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 216 transitions. [2019-10-15 01:37:23,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-15 01:37:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 216 transitions. [2019-10-15 01:37:23,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-15 01:37:23,514 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:23,514 INFO L380 BasicCegarLoop]: trace histogram [56, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:23,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:23,718 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:23,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:23,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1937432377, now seen corresponding path program 3 times [2019-10-15 01:37:23,719 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:23,719 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906627136] [2019-10-15 01:37:23,719 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:23,720 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:23,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:23,740 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:23,740 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529814205] [2019-10-15 01:37:23,741 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:23,848 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:37:23,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:23,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-15 01:37:23,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1788 backedges. 1002 proven. 242 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-10-15 01:37:24,070 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1788 backedges. 1002 proven. 242 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-10-15 01:37:24,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906627136] [2019-10-15 01:37:24,364 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:24,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529814205] [2019-10-15 01:37:24,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1439279026] [2019-10-15 01:37:24,375 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:37:24,375 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:24,375 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:24,376 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:24,376 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:24,405 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:25,617 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2019-10-15 01:37:25,622 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:25,625 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:26,238 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2019-10-15 01:37:26,726 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:26,727 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 12] total 50 [2019-10-15 01:37:26,727 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942702036] [2019-10-15 01:37:26,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-10-15 01:37:26,729 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:26,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-10-15 01:37:26,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=1872, Unknown=0, NotChecked=0, Total=2450 [2019-10-15 01:37:26,731 INFO L87 Difference]: Start difference. First operand 178 states and 216 transitions. Second operand 50 states. [2019-10-15 01:37:28,070 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2019-10-15 01:37:28,513 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2019-10-15 01:37:29,037 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2019-10-15 01:37:30,536 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2019-10-15 01:37:30,756 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2019-10-15 01:37:30,991 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2019-10-15 01:37:31,282 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2019-10-15 01:37:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:33,355 INFO L93 Difference]: Finished difference Result 700 states and 872 transitions. [2019-10-15 01:37:33,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-10-15 01:37:33,356 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 81 [2019-10-15 01:37:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:33,360 INFO L225 Difference]: With dead ends: 700 [2019-10-15 01:37:33,360 INFO L226 Difference]: Without dead ends: 561 [2019-10-15 01:37:33,365 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3840 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2688, Invalid=8024, Unknown=0, NotChecked=0, Total=10712 [2019-10-15 01:37:33,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2019-10-15 01:37:33,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 558. [2019-10-15 01:37:33,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-15 01:37:33,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 681 transitions. [2019-10-15 01:37:33,455 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 681 transitions. Word has length 81 [2019-10-15 01:37:33,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:33,456 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 681 transitions. [2019-10-15 01:37:33,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-10-15 01:37:33,456 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 681 transitions. [2019-10-15 01:37:33,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-10-15 01:37:33,461 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:33,461 INFO L380 BasicCegarLoop]: trace histogram [196, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:33,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:33,670 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:33,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:33,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1331474927, now seen corresponding path program 4 times [2019-10-15 01:37:33,671 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:33,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274167197] [2019-10-15 01:37:33,672 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:33,672 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:33,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:33,687 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:33,687 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778069070] [2019-10-15 01:37:33,687 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:33,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-15 01:37:33,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 22068 backedges. 2942 proven. 105 refuted. 0 times theorem prover too weak. 19021 trivial. 0 not checked. [2019-10-15 01:37:34,148 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 22068 backedges. 2942 proven. 105 refuted. 0 times theorem prover too weak. 19021 trivial. 0 not checked. [2019-10-15 01:37:34,527 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274167197] [2019-10-15 01:37:34,527 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:34,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778069070] [2019-10-15 01:37:34,530 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1897935842] [2019-10-15 01:37:34,533 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:37:34,533 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:34,534 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:34,534 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:34,534 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:34,553 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:35,683 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2019-10-15 01:37:35,689 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:35,691 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:36,165 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2019-10-15 01:37:36,507 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:36,508 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 12] total 46 [2019-10-15 01:37:36,508 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153376373] [2019-10-15 01:37:36,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-10-15 01:37:36,509 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:36,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-10-15 01:37:36,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=1429, Unknown=0, NotChecked=0, Total=2070 [2019-10-15 01:37:36,510 INFO L87 Difference]: Start difference. First operand 558 states and 681 transitions. Second operand 46 states. [2019-10-15 01:37:39,422 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2019-10-15 01:37:41,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:41,183 INFO L93 Difference]: Finished difference Result 1657 states and 2349 transitions. [2019-10-15 01:37:41,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-15 01:37:41,184 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 241 [2019-10-15 01:37:41,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:41,199 INFO L225 Difference]: With dead ends: 1657 [2019-10-15 01:37:41,199 INFO L226 Difference]: Without dead ends: 1121 [2019-10-15 01:37:41,204 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 677 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2090, Invalid=5220, Unknown=0, NotChecked=0, Total=7310 [2019-10-15 01:37:41,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2019-10-15 01:37:41,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1118. [2019-10-15 01:37:41,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1118 states. [2019-10-15 01:37:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1353 transitions. [2019-10-15 01:37:41,367 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1353 transitions. Word has length 241 [2019-10-15 01:37:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:41,368 INFO L462 AbstractCegarLoop]: Abstraction has 1118 states and 1353 transitions. [2019-10-15 01:37:41,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-10-15 01:37:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1353 transitions. [2019-10-15 01:37:41,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2019-10-15 01:37:41,383 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:41,383 INFO L380 BasicCegarLoop]: trace histogram [420, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:41,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:41,598 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:41,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:41,598 INFO L82 PathProgramCache]: Analyzing trace with hash -148070417, now seen corresponding path program 5 times [2019-10-15 01:37:41,599 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:41,599 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838423406] [2019-10-15 01:37:41,599 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:41,600 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:41,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:41,620 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:41,620 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826845333] [2019-10-15 01:37:41,620 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