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_init2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:33:27,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:33:27,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:33:27,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:33:27,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:33:27,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:33:27,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:33:27,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:33:27,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:33:27,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:33:27,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:33:27,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:33:27,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:33:27,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:33:27,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:33:27,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:33:27,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:33:27,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:33:27,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:33:27,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:33:27,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:33:27,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:33:27,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:33:27,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:33:27,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:33:27,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:33:27,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:33:27,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:33:27,171 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 01:33:27,188 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:33:27,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:33:27,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:33:27,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:33:27,191 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:33:27,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:33:27,194 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:33:27,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:33:27,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:33:27,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:33:27,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:33:27,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:33:27,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:33:27,195 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:33:27,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:33:27,196 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:33:27,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:33:27,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:33:27,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:33:27,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:33:27,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:33:27,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:33:27,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:33:27,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:33:27,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:33:27,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:33:27,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:33:27,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:33:27,200 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 01:33:27,480 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:33:27,494 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:33:27,497 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:33:27,499 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:33:27,499 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:33:27,500 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init2_ground-1.i [2019-10-15 01:33:27,563 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fbc46950/960fc12b706443199ed1439fd5e2e2ac/FLAGdcfb0205e [2019-10-15 01:33:27,961 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:33:27,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init2_ground-1.i [2019-10-15 01:33:27,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fbc46950/960fc12b706443199ed1439fd5e2e2ac/FLAGdcfb0205e [2019-10-15 01:33:28,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fbc46950/960fc12b706443199ed1439fd5e2e2ac [2019-10-15 01:33:28,399 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:33:28,403 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:33:28,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:28,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:33:28,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:33:28,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:28" (1/1) ... [2019-10-15 01:33:28,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d5d6786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:28, skipping insertion in model container [2019-10-15 01:33:28,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:28" (1/1) ... [2019-10-15 01:33:28,421 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:33:28,441 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:33:28,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:28,696 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:33:28,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:28,748 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:33:28,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:28 WrapperNode [2019-10-15 01:33:28,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:28,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:33:28,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:33:28,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:33:28,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:28" (1/1) ... [2019-10-15 01:33:28,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:28" (1/1) ... [2019-10-15 01:33:28,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:28" (1/1) ... [2019-10-15 01:33:28,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:28" (1/1) ... [2019-10-15 01:33:28,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:28" (1/1) ... [2019-10-15 01:33:28,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:28" (1/1) ... [2019-10-15 01:33:28,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:28" (1/1) ... [2019-10-15 01:33:28,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:33:28,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:33:28,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:33:28,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:33:28,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:28" (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 01:33:28,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:33:28,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:33:28,970 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:33:28,971 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:33:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:33:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:33:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:33:28,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:33:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:33:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:33:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:33:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:33:28,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:33:29,365 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:33:29,365 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:33:29,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:29 BoogieIcfgContainer [2019-10-15 01:33:29,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:33:29,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:33:29,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:33:29,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:33:29,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:33:28" (1/3) ... [2019-10-15 01:33:29,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28216534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:29, skipping insertion in model container [2019-10-15 01:33:29,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:28" (2/3) ... [2019-10-15 01:33:29,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28216534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:29, skipping insertion in model container [2019-10-15 01:33:29,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:29" (3/3) ... [2019-10-15 01:33:29,375 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init2_ground-1.i [2019-10-15 01:33:29,384 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:33:29,390 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:33:29,403 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:33:29,434 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:33:29,434 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:33:29,434 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:33:29,434 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:33:29,434 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:33:29,435 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:33:29,435 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:33:29,435 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:33:29,461 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:33:29,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:33:29,471 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:29,472 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:29,476 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:29,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:29,483 INFO L82 PathProgramCache]: Analyzing trace with hash 205655519, now seen corresponding path program 1 times [2019-10-15 01:33:29,494 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:29,495 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397171218] [2019-10-15 01:33:29,495 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:29,495 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:29,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:29,719 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 01:33:29,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397171218] [2019-10-15 01:33:29,721 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:33:29,721 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:33:29,722 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739585768] [2019-10-15 01:33:29,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:33:29,727 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:29,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:33:29,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:33:29,742 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-15 01:33:29,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:29,804 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2019-10-15 01:33:29,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:33:29,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:33:29,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:29,817 INFO L225 Difference]: With dead ends: 34 [2019-10-15 01:33:29,818 INFO L226 Difference]: Without dead ends: 18 [2019-10-15 01:33:29,823 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 01:33:29,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-15 01:33:29,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-15 01:33:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:33:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-15 01:33:29,863 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2019-10-15 01:33:29,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:29,864 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-15 01:33:29,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:33:29,864 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-15 01:33:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:33:29,865 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:29,865 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:29,866 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:29,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:29,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1509760332, now seen corresponding path program 1 times [2019-10-15 01:33:29,867 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:29,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105677246] [2019-10-15 01:33:29,868 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:29,868 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:29,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:33:29,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105677246] [2019-10-15 01:33:29,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479535590] [2019-10-15 01:33:29,932 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 01:33:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:29,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:33:30,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:33:30,047 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:33:30,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1111873919] [2019-10-15 01:33:30,103 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:33:30,103 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:30,109 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:30,119 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:30,119 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:30,303 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:30,893 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:30,907 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:30,914 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:31,412 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:31,412 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:33:31,413 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134709702] [2019-10-15 01:33:31,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:33:31,416 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:31,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:33:31,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:33:31,417 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 17 states. [2019-10-15 01:33:32,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:32,108 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-10-15 01:33:32,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:33:32,109 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2019-10-15 01:33:32,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:32,111 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:33:32,111 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 01:33:32,113 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:33:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 01:33:32,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2019-10-15 01:33:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:33:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-15 01:33:32,128 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-10-15 01:33:32,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:32,131 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-15 01:33:32,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:33:32,132 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-15 01:33:32,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:33:32,133 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:32,134 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:32,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:32,339 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:32,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:32,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1450262815, now seen corresponding path program 2 times [2019-10-15 01:33:32,340 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:32,340 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981491915] [2019-10-15 01:33:32,341 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:32,341 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:32,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:33:32,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981491915] [2019-10-15 01:33:32,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105934615] [2019-10-15 01:33:32,430 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 01:33:32,492 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:33:32,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:32,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:33:32,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:33:32,505 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:33:32,564 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [347628872] [2019-10-15 01:33:32,566 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:33:32,566 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:32,567 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:32,567 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:32,567 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:32,603 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:32,950 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:32,971 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:32,991 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:33,453 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:33,453 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:33:33,454 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105425899] [2019-10-15 01:33:33,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:33:33,455 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:33,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:33:33,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:33:33,456 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 23 states. [2019-10-15 01:33:34,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:34,374 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2019-10-15 01:33:34,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:33:34,374 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2019-10-15 01:33:34,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:34,376 INFO L225 Difference]: With dead ends: 59 [2019-10-15 01:33:34,376 INFO L226 Difference]: Without dead ends: 45 [2019-10-15 01:33:34,377 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:33:34,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-15 01:33:34,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2019-10-15 01:33:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 01:33:34,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-10-15 01:33:34,386 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 20 [2019-10-15 01:33:34,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:34,387 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-10-15 01:33:34,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:33:34,387 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-10-15 01:33:34,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:33:34,388 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:34,388 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:34,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:34,593 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:34,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:34,594 INFO L82 PathProgramCache]: Analyzing trace with hash 807641599, now seen corresponding path program 3 times [2019-10-15 01:33:34,594 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:34,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356034765] [2019-10-15 01:33:34,595 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:34,596 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:34,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:33:34,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356034765] [2019-10-15 01:33:34,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937070409] [2019-10-15 01:33:34,760 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 01:33:34,844 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:33:34,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:34,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:33:34,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:33:34,866 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:33:35,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1047198952] [2019-10-15 01:33:35,064 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:33:35,064 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:35,064 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:35,065 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:35,065 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:35,091 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:35,329 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:35,341 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:35,360 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:35,986 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:35,986 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:33:35,986 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992184124] [2019-10-15 01:33:35,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:33:35,988 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:35,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:33:35,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:33:35,989 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 35 states. [2019-10-15 01:33:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:37,588 INFO L93 Difference]: Finished difference Result 89 states and 116 transitions. [2019-10-15 01:33:37,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:33:37,589 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 32 [2019-10-15 01:33:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:37,591 INFO L225 Difference]: With dead ends: 89 [2019-10-15 01:33:37,591 INFO L226 Difference]: Without dead ends: 69 [2019-10-15 01:33:37,594 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 65 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:33:37,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-15 01:33:37,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-10-15 01:33:37,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-15 01:33:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-10-15 01:33:37,606 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 32 [2019-10-15 01:33:37,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:37,607 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-10-15 01:33:37,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:33:37,607 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-10-15 01:33:37,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-15 01:33:37,609 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:37,609 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:37,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:37,810 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:37,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:37,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1094079553, now seen corresponding path program 4 times [2019-10-15 01:33:37,811 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:37,811 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393626995] [2019-10-15 01:33:37,812 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:37,812 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:37,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:33:38,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393626995] [2019-10-15 01:33:38,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350892384] [2019-10-15 01:33:38,216 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 01:33:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:38,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:33:38,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:33:38,326 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:33:38,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1519349108] [2019-10-15 01:33:38,998 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:33:38,998 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:38,999 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:38,999 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:38,999 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:39,040 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:39,265 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:39,272 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:39,277 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:40,242 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:40,242 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:33:40,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693876345] [2019-10-15 01:33:40,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:33:40,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:40,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:33:40,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:33:40,247 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 59 states. [2019-10-15 01:33:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:43,723 INFO L93 Difference]: Finished difference Result 149 states and 200 transitions. [2019-10-15 01:33:43,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:33:43,724 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 56 [2019-10-15 01:33:43,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:43,726 INFO L225 Difference]: With dead ends: 149 [2019-10-15 01:33:43,727 INFO L226 Difference]: Without dead ends: 117 [2019-10-15 01:33:43,730 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 113 SyntacticMatches, 23 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4386 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:33:43,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-15 01:33:43,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 108. [2019-10-15 01:33:43,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-15 01:33:43,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2019-10-15 01:33:43,748 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 56 [2019-10-15 01:33:43,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:43,748 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2019-10-15 01:33:43,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:33:43,749 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2019-10-15 01:33:43,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 01:33:43,752 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:43,752 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:43,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:43,957 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:43,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:43,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1805836095, now seen corresponding path program 5 times [2019-10-15 01:33:43,958 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:43,958 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799917636] [2019-10-15 01:33:43,959 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:43,959 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:43,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:33:45,018 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799917636] [2019-10-15 01:33:45,018 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537247809] [2019-10-15 01:33:45,018 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