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-examples/standard_init5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:34:05,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:34:05,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:34:05,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:34:05,137 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:34:05,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:34:05,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:34:05,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:34:05,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:34:05,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:34:05,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:34:05,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:34:05,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:34:05,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:34:05,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:34:05,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:34:05,168 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:34:05,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:34:05,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:34:05,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:34:05,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:34:05,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:34:05,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:34:05,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:34:05,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:34:05,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:34:05,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:34:05,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:34:05,193 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 01:34:05,207 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:34:05,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:34:05,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:34:05,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:34:05,209 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:34:05,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:34:05,210 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:34:05,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:34:05,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:34:05,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:34:05,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:34:05,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:34:05,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:34:05,211 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:34:05,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:34:05,212 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:34:05,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:34:05,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:34:05,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:34:05,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:34:05,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:34:05,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:05,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:34:05,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:34:05,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:34:05,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:34:05,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:34:05,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:34:05,214 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 01:34:05,521 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:34:05,534 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:34:05,538 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:34:05,540 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:34:05,540 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:34:05,541 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2019-10-15 01:34:05,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0619ef028/3483b70928494b1e8a90f99d4f05029b/FLAGa92a9aa29 [2019-10-15 01:34:06,092 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:34:06,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2019-10-15 01:34:06,100 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0619ef028/3483b70928494b1e8a90f99d4f05029b/FLAGa92a9aa29 [2019-10-15 01:34:06,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0619ef028/3483b70928494b1e8a90f99d4f05029b [2019-10-15 01:34:06,493 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:06,495 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:06,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:06,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:06,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:06,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:06,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510c1389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06, skipping insertion in model container [2019-10-15 01:34:06,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:06,512 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:06,534 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:06,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:06,756 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:06,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:06,795 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:06,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06 WrapperNode [2019-10-15 01:34:06,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:06,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:06,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:06,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:06,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:06,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:06,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:06,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:06,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:06,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:06,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:06,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:06,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:06,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:06,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:06,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (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 01:34:06,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:06,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:06,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:06,999 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:06,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:06,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:07,000 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:07,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:07,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:07,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:07,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:07,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:07,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:07,381 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:07,382 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-15 01:34:07,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:07 BoogieIcfgContainer [2019-10-15 01:34:07,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:07,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:07,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:07,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:07,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:06" (1/3) ... [2019-10-15 01:34:07,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc93847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:07, skipping insertion in model container [2019-10-15 01:34:07,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (2/3) ... [2019-10-15 01:34:07,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc93847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:07, skipping insertion in model container [2019-10-15 01:34:07,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:07" (3/3) ... [2019-10-15 01:34:07,392 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-1.i [2019-10-15 01:34:07,401 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:07,410 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:07,422 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:07,446 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:07,446 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:07,446 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:07,447 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:07,447 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:07,447 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:07,447 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:07,447 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:07,464 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-15 01:34:07,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:34:07,471 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:07,473 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:07,475 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:07,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:07,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2033634507, now seen corresponding path program 1 times [2019-10-15 01:34:07,490 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:07,490 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190426999] [2019-10-15 01:34:07,491 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:07,491 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:07,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:07,649 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 01:34:07,652 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190426999] [2019-10-15 01:34:07,653 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:07,653 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:07,654 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362567421] [2019-10-15 01:34:07,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:07,661 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:07,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:07,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:07,685 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-10-15 01:34:07,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:07,803 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2019-10-15 01:34:07,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:07,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-15 01:34:07,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:07,818 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:34:07,818 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 01:34:07,823 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:07,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 01:34:07,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-15 01:34:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:34:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-10-15 01:34:07,880 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2019-10-15 01:34:07,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:07,882 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-10-15 01:34:07,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:07,882 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-10-15 01:34:07,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:34:07,884 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:07,884 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:07,885 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:07,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:07,886 INFO L82 PathProgramCache]: Analyzing trace with hash -2054156691, now seen corresponding path program 1 times [2019-10-15 01:34:07,886 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:07,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171401396] [2019-10-15 01:34:07,887 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:07,887 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:07,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:34:08,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171401396] [2019-10-15 01:34:08,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994543717] [2019-10-15 01:34:08,042 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 01:34:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:08,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:08,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:34:08,154 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:34:08,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [984528391] [2019-10-15 01:34:08,216 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:34:08,217 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:08,223 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:08,232 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:08,232 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:08,413 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:09,437 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:09,469 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:09,483 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:10,205 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:10,206 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:34:10,206 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220811092] [2019-10-15 01:34:10,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:34:10,209 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:10,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:34:10,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:34:10,214 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 17 states. [2019-10-15 01:34:11,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:11,119 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2019-10-15 01:34:11,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:34:11,120 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-10-15 01:34:11,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:11,122 INFO L225 Difference]: With dead ends: 65 [2019-10-15 01:34:11,122 INFO L226 Difference]: Without dead ends: 48 [2019-10-15 01:34:11,123 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:34:11,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-15 01:34:11,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2019-10-15 01:34:11,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-15 01:34:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2019-10-15 01:34:11,144 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 20 [2019-10-15 01:34:11,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:11,149 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2019-10-15 01:34:11,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:34:11,150 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2019-10-15 01:34:11,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-15 01:34:11,152 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:11,153 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:11,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:11,357 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:11,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:11,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1023410357, now seen corresponding path program 2 times [2019-10-15 01:34:11,359 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:11,359 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048344887] [2019-10-15 01:34:11,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:11,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:11,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:34:11,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048344887] [2019-10-15 01:34:11,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964039503] [2019-10-15 01:34:11,522 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 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 01:34:11,601 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:34:11,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:11,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:34:11,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:34:11,619 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:34:11,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [155221032] [2019-10-15 01:34:11,675 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:34:11,676 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:11,676 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:11,677 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:11,677 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:11,728 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:12,368 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:12,378 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:12,383 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:13,064 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:13,064 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:34:13,064 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227791282] [2019-10-15 01:34:13,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:34:13,066 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:13,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:34:13,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:34:13,067 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 23 states. [2019-10-15 01:34:14,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:14,121 INFO L93 Difference]: Finished difference Result 107 states and 146 transitions. [2019-10-15 01:34:14,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:34:14,121 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2019-10-15 01:34:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:14,123 INFO L225 Difference]: With dead ends: 107 [2019-10-15 01:34:14,123 INFO L226 Difference]: Without dead ends: 78 [2019-10-15 01:34:14,125 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 82 SyntacticMatches, 20 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:34:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-15 01:34:14,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2019-10-15 01:34:14,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-15 01:34:14,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2019-10-15 01:34:14,140 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 35 [2019-10-15 01:34:14,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:14,140 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2019-10-15 01:34:14,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:34:14,140 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2019-10-15 01:34:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-15 01:34:14,144 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:14,144 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:14,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:14,357 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:14,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:14,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1871527157, now seen corresponding path program 3 times [2019-10-15 01:34:14,359 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:14,360 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580136423] [2019-10-15 01:34:14,360 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:14,360 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:14,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-15 01:34:14,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580136423] [2019-10-15 01:34:14,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127516791] [2019-10-15 01:34:14,590 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 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 01:34:14,694 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:34:14,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:14,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:34:14,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-15 01:34:14,738 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-15 01:34:14,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1723950273] [2019-10-15 01:34:14,958 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:34:14,959 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:14,959 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:14,959 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:14,960 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:14,985 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:15,454 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:15,464 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:15,469 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:16,478 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:16,478 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:34:16,478 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060862576] [2019-10-15 01:34:16,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:34:16,480 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:16,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:34:16,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:34:16,481 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 35 states. [2019-10-15 01:34:18,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:18,376 INFO L93 Difference]: Finished difference Result 191 states and 260 transitions. [2019-10-15 01:34:18,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:34:18,382 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 65 [2019-10-15 01:34:18,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:18,383 INFO L225 Difference]: With dead ends: 191 [2019-10-15 01:34:18,383 INFO L226 Difference]: Without dead ends: 138 [2019-10-15 01:34:18,389 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 131 SyntacticMatches, 44 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:34:18,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-10-15 01:34:18,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2019-10-15 01:34:18,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-10-15 01:34:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 134 transitions. [2019-10-15 01:34:18,410 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 134 transitions. Word has length 65 [2019-10-15 01:34:18,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:18,411 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 134 transitions. [2019-10-15 01:34:18,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:34:18,411 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 134 transitions. [2019-10-15 01:34:18,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 01:34:18,415 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:18,416 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:18,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:18,620 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:18,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:18,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1693517173, now seen corresponding path program 4 times [2019-10-15 01:34:18,621 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:18,622 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319278408] [2019-10-15 01:34:18,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:18,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:18,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2019-10-15 01:34:19,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319278408] [2019-10-15 01:34:19,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554685120] [2019-10-15 01:34:19,132 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 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 01:34:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:19,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:34:19,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2019-10-15 01:34:19,304 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2019-10-15 01:34:20,063 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1363908657] [2019-10-15 01:34:20,065 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:34:20,065 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:20,065 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:20,066 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:20,066 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:20,090 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:20,475 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:20,485 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:20,488 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:23,079 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:23,079 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:34:23,079 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580265910] [2019-10-15 01:34:23,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:34:23,082 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:23,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:34:23,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:34:23,085 INFO L87 Difference]: Start difference. First operand 129 states and 134 transitions. Second operand 59 states. [2019-10-15 01:34:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:27,384 INFO L93 Difference]: Finished difference Result 359 states and 488 transitions. [2019-10-15 01:34:27,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:34:27,384 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 125 [2019-10-15 01:34:27,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:27,387 INFO L225 Difference]: With dead ends: 359 [2019-10-15 01:34:27,387 INFO L226 Difference]: Without dead ends: 258 [2019-10-15 01:34:27,391 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 251 SyntacticMatches, 92 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9285 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:34:27,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-10-15 01:34:27,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 249. [2019-10-15 01:34:27,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2019-10-15 01:34:27,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 254 transitions. [2019-10-15 01:34:27,423 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 254 transitions. Word has length 125 [2019-10-15 01:34:27,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:27,423 INFO L462 AbstractCegarLoop]: Abstraction has 249 states and 254 transitions. [2019-10-15 01:34:27,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:34:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 254 transitions. [2019-10-15 01:34:27,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2019-10-15 01:34:27,428 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:27,428 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:27,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:27,647 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:27,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:27,648 INFO L82 PathProgramCache]: Analyzing trace with hash 717367691, now seen corresponding path program 5 times [2019-10-15 01:34:27,648 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:27,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431697278] [2019-10-15 01:34:27,649 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:27,649 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:27,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2019-10-15 01:34:28,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431697278] [2019-10-15 01:34:28,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080037835] [2019-10-15 01:34:28,846 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