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/loops/sum03-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:04:04,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:04:04,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:04:04,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:04:04,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:04:04,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:04:04,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:04:04,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:04:04,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:04:04,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:04:04,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:04:04,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:04:04,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:04:04,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:04:04,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:04:04,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:04:04,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:04:04,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:04:04,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:04:04,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:04:04,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:04:04,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:04:04,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:04:04,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:04:04,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:04:04,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:04:04,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:04:04,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:04:04,370 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 03:04:04,399 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:04:04,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:04:04,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:04:04,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:04:04,401 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:04:04,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:04:04,402 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:04:04,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:04:04,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:04:04,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:04:04,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:04:04,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:04:04,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:04:04,403 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:04:04,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:04:04,403 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:04:04,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:04:04,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:04:04,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:04:04,404 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:04:04,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:04:04,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:04:04,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:04:04,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:04:04,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:04:04,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:04:04,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:04:04,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:04:04,406 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 03:04:04,747 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:04:04,772 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:04:04,777 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:04:04,779 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:04:04,779 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:04:04,780 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum03-1.i [2019-10-15 03:04:04,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c985c19ff/d837de202ac44668a36dbda87447a389/FLAGc4417f1e6 [2019-10-15 03:04:05,513 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:04:05,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03-1.i [2019-10-15 03:04:05,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c985c19ff/d837de202ac44668a36dbda87447a389/FLAGc4417f1e6 [2019-10-15 03:04:05,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c985c19ff/d837de202ac44668a36dbda87447a389 [2019-10-15 03:04:05,929 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:04:05,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:04:05,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:04:05,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:04:05,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:04:05,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:04:05" (1/1) ... [2019-10-15 03:04:05,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f01cc96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:05, skipping insertion in model container [2019-10-15 03:04:05,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:04:05" (1/1) ... [2019-10-15 03:04:05,970 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:04:05,993 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:04:06,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:04:06,231 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:04:06,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:04:06,263 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:04:06,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:06 WrapperNode [2019-10-15 03:04:06,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:04:06,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:04:06,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:04:06,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:04:06,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:06" (1/1) ... [2019-10-15 03:04:06,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:06" (1/1) ... [2019-10-15 03:04:06,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:06" (1/1) ... [2019-10-15 03:04:06,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:06" (1/1) ... [2019-10-15 03:04:06,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:06" (1/1) ... [2019-10-15 03:04:06,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:06" (1/1) ... [2019-10-15 03:04:06,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:06" (1/1) ... [2019-10-15 03:04:06,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:04:06,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:04:06,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:04:06,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:04:06,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:06" (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 03:04:06,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:04:06,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:04:06,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:04:06,450 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:04:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:04:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:04:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-15 03:04:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:04:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:04:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:04:06,718 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:04:06,719 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:04:06,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:04:06 BoogieIcfgContainer [2019-10-15 03:04:06,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:04:06,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:04:06,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:04:06,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:04:06,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:04:05" (1/3) ... [2019-10-15 03:04:06,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0ecdeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:04:06, skipping insertion in model container [2019-10-15 03:04:06,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:06" (2/3) ... [2019-10-15 03:04:06,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0ecdeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:04:06, skipping insertion in model container [2019-10-15 03:04:06,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:04:06" (3/3) ... [2019-10-15 03:04:06,742 INFO L109 eAbstractionObserver]: Analyzing ICFG sum03-1.i [2019-10-15 03:04:06,763 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:04:06,784 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:04:06,794 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:04:06,819 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:04:06,819 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:04:06,819 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:04:06,819 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:04:06,819 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:04:06,820 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:04:06,820 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:04:06,820 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:04:06,839 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-10-15 03:04:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 03:04:06,845 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:06,846 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:06,848 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:06,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:06,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1736341467, now seen corresponding path program 1 times [2019-10-15 03:04:06,861 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:06,862 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903599028] [2019-10-15 03:04:06,862 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:06,862 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:06,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:07,213 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 10 [2019-10-15 03:04:07,368 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2019-10-15 03:04:07,410 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 03:04:07,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903599028] [2019-10-15 03:04:07,414 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:04:07,415 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 03:04:07,415 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948735641] [2019-10-15 03:04:07,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 03:04:07,425 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:07,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 03:04:07,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:04:07,451 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 6 states. [2019-10-15 03:04:07,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:07,934 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2019-10-15 03:04:07,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:04:07,937 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-10-15 03:04:07,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:07,957 INFO L225 Difference]: With dead ends: 31 [2019-10-15 03:04:07,959 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 03:04:07,969 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:04:08,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 03:04:08,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-10-15 03:04:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 03:04:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-15 03:04:08,035 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2019-10-15 03:04:08,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:08,036 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-15 03:04:08,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 03:04:08,037 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-15 03:04:08,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 03:04:08,038 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:08,038 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:08,039 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:08,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:08,039 INFO L82 PathProgramCache]: Analyzing trace with hash -239611021, now seen corresponding path program 1 times [2019-10-15 03:04:08,040 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:08,040 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236812172] [2019-10-15 03:04:08,041 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:08,041 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:08,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:08,507 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2019-10-15 03:04:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:08,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236812172] [2019-10-15 03:04:08,533 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972186009] [2019-10-15 03:04:08,533 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 03:04:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:08,586 WARN L254 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-15 03:04:08,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:08,636 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:04:08,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:04:08,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:04:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:08,924 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:10,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:04:23,189 WARN L191 SmtUtils]: Spent 10.10 s on a formula simplification that was a NOOP. DAG size: 22 [2019-10-15 03:04:23,258 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:04:57,220 WARN L191 SmtUtils]: Spent 23.74 s on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-10-15 03:04:57,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms