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_partition_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:34:52,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:34:52,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:34:52,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:34:52,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:34:52,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:34:52,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:34:52,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:34:52,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:34:52,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:34:52,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:34:53,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:34:53,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:34:53,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:34:53,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:34:53,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:34:53,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:34:53,007 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:34:53,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:34:53,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:34:53,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:34:53,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:34:53,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:34:53,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:34:53,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:34:53,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:34:53,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:34:53,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:34:53,026 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 01:34:53,044 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:34:53,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:34:53,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:34:53,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:34:53,047 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:34:53,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:34:53,048 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:34:53,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:34:53,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:34:53,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:34:53,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:34:53,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:34:53,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:34:53,051 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:34:53,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:34:53,051 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:34:53,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:34:53,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:34:53,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:34:53,052 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:34:53,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:34:53,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:53,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:34:53,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:34:53,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:34:53,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:34:53,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:34:53,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:34:53,054 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 01:34:53,309 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:34:53,324 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:34:53,329 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:34:53,331 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:34:53,331 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:34:53,332 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2019-10-15 01:34:53,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b197fab0d/9b34b80cd4e84869b8b455ec41b7fe36/FLAGb4dde7653 [2019-10-15 01:34:53,898 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:34:53,899 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2019-10-15 01:34:53,906 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b197fab0d/9b34b80cd4e84869b8b455ec41b7fe36/FLAGb4dde7653 [2019-10-15 01:34:54,327 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b197fab0d/9b34b80cd4e84869b8b455ec41b7fe36 [2019-10-15 01:34:54,337 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:54,339 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:54,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:54,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:54,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:54,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:54" (1/1) ... [2019-10-15 01:34:54,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cfc3857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:54, skipping insertion in model container [2019-10-15 01:34:54,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:54" (1/1) ... [2019-10-15 01:34:54,357 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:54,377 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:54,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:54,588 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:54,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:54,632 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:54,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:54 WrapperNode [2019-10-15 01:34:54,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:54,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:54,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:54,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:54,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:54" (1/1) ... [2019-10-15 01:34:54,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:54" (1/1) ... [2019-10-15 01:34:54,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:54" (1/1) ... [2019-10-15 01:34:54,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:54" (1/1) ... [2019-10-15 01:34:54,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:54" (1/1) ... [2019-10-15 01:34:54,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:54" (1/1) ... [2019-10-15 01:34:54,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:54" (1/1) ... [2019-10-15 01:34:54,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:54,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:54,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:54,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:54,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:54" (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 01:34:54,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:54,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:54,822 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:54,822 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:54,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:54,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:54,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:34:54,822 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:54,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:54,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:54,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:54,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:54,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:54,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:55,286 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:55,287 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 01:34:55,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:55 BoogieIcfgContainer [2019-10-15 01:34:55,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:55,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:55,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:55,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:55,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:54" (1/3) ... [2019-10-15 01:34:55,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ca3558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:55, skipping insertion in model container [2019-10-15 01:34:55,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:54" (2/3) ... [2019-10-15 01:34:55,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ca3558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:55, skipping insertion in model container [2019-10-15 01:34:55,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:55" (3/3) ... [2019-10-15 01:34:55,296 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2019-10-15 01:34:55,306 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:55,313 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:55,324 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:55,346 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:55,346 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:55,346 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:55,346 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:55,347 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:55,347 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:55,347 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:55,347 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:55,362 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 01:34:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:34:55,367 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:55,368 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:55,370 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:55,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:55,374 INFO L82 PathProgramCache]: Analyzing trace with hash 196542356, now seen corresponding path program 1 times [2019-10-15 01:34:55,382 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:55,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272404043] [2019-10-15 01:34:55,382 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:55,383 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:55,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:55,543 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 01:34:55,544 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272404043] [2019-10-15 01:34:55,545 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:55,545 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:55,545 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250519378] [2019-10-15 01:34:55,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:55,551 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:55,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:55,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:55,566 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-10-15 01:34:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:55,603 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2019-10-15 01:34:55,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:55,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:34:55,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:55,614 INFO L225 Difference]: With dead ends: 35 [2019-10-15 01:34:55,615 INFO L226 Difference]: Without dead ends: 18 [2019-10-15 01:34:55,618 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 01:34:55,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-15 01:34:55,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-15 01:34:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:34:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-10-15 01:34:55,659 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2019-10-15 01:34:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:55,660 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-10-15 01:34:55,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-10-15 01:34:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:34:55,661 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:55,661 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:55,661 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:55,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:55,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2146985976, now seen corresponding path program 1 times [2019-10-15 01:34:55,663 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:55,663 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949145480] [2019-10-15 01:34:55,663 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:55,663 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:55,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:34:55,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949145480] [2019-10-15 01:34:55,724 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:55,725 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:55,725 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171899480] [2019-10-15 01:34:55,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:55,727 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:55,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:55,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:55,728 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2019-10-15 01:34:55,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:55,756 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2019-10-15 01:34:55,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:55,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-15 01:34:55,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:55,758 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:34:55,758 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:34:55,759 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 01:34:55,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:34:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:34:55,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:34:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-10-15 01:34:55,766 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2019-10-15 01:34:55,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:55,766 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-10-15 01:34:55,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:55,766 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-10-15 01:34:55,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:34:55,767 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:55,767 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:55,768 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:55,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:55,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1135498834, now seen corresponding path program 1 times [2019-10-15 01:34:55,769 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:55,769 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862956023] [2019-10-15 01:34:55,769 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:55,769 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:55,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:34:55,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862956023] [2019-10-15 01:34:55,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129863050] [2019-10-15 01:34:55,854 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 01:34:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:55,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:55,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:34:55,982 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:34:56,019 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [782070010] [2019-10-15 01:34:56,046 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:34:56,046 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:56,053 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:56,062 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:56,063 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:56,268 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:56,729 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:34:56,752 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:56,762 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:57,158 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:57,158 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 12] total 19 [2019-10-15 01:34:57,158 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095736152] [2019-10-15 01:34:57,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 01:34:57,160 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:57,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 01:34:57,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:34:57,162 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 19 states. [2019-10-15 01:34:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:57,897 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2019-10-15 01:34:57,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 01:34:57,897 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 16 [2019-10-15 01:34:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:57,899 INFO L225 Difference]: With dead ends: 47 [2019-10-15 01:34:57,899 INFO L226 Difference]: Without dead ends: 34 [2019-10-15 01:34:57,901 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 01:34:57,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-15 01:34:57,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2019-10-15 01:34:57,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:34:57,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-15 01:34:57,912 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2019-10-15 01:34:57,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:57,913 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-15 01:34:57,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 01:34:57,913 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-15 01:34:57,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:34:57,914 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:57,915 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:58,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:58,126 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:58,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:58,127 INFO L82 PathProgramCache]: Analyzing trace with hash -11162668, now seen corresponding path program 2 times [2019-10-15 01:34:58,127 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:58,127 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982839696] [2019-10-15 01:34:58,127 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:58,127 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:58,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:34:58,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982839696] [2019-10-15 01:34:58,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835545014] [2019-10-15 01:34:58,234 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 01:34:58,303 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:34:58,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:58,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:34:58,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 01:34:58,343 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 01:34:58,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1236222272] [2019-10-15 01:34:58,389 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:34:58,389 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:58,390 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:58,390 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:58,390 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:58,431 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:58,672 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:34:58,707 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:58,716 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:59,055 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:59,056 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 12] total 24 [2019-10-15 01:34:59,056 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588752367] [2019-10-15 01:34:59,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 01:34:59,058 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:59,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 01:34:59,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:34:59,059 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 24 states. [2019-10-15 01:35:00,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:00,168 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2019-10-15 01:35:00,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-15 01:35:00,170 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2019-10-15 01:35:00,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:00,171 INFO L225 Difference]: With dead ends: 58 [2019-10-15 01:35:00,171 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 01:35:00,173 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=397, Invalid=2053, Unknown=0, NotChecked=0, Total=2450 [2019-10-15 01:35:00,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 01:35:00,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2019-10-15 01:35:00,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-15 01:35:00,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2019-10-15 01:35:00,181 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 21 [2019-10-15 01:35:00,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:00,182 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2019-10-15 01:35:00,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 01:35:00,182 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2019-10-15 01:35:00,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-15 01:35:00,183 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:00,183 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:00,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:00,393 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:00,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:00,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1498178232, now seen corresponding path program 3 times [2019-10-15 01:35:00,394 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:00,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83901677] [2019-10-15 01:35:00,395 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:00,395 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:00,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:35:00,562 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83901677] [2019-10-15 01:35:00,562 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785655618] [2019-10-15 01:35:00,562 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 01:35:00,639 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:00,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:00,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:35:00,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-15 01:35:00,720 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-15 01:35:00,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [702875486] [2019-10-15 01:35:00,862 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:35:00,863 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:00,863 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:00,864 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:00,865 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:00,908 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:01,163 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:35:01,189 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:01,193 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:01,561 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:01,562 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 12] total 32 [2019-10-15 01:35:01,562 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568358431] [2019-10-15 01:35:01,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-15 01:35:01,564 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:01,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-15 01:35:01,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:35:01,565 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 32 states. [2019-10-15 01:35:02,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:02,762 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2019-10-15 01:35:02,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-15 01:35:02,763 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 30 [2019-10-15 01:35:02,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:02,764 INFO L225 Difference]: With dead ends: 75 [2019-10-15 01:35:02,765 INFO L226 Difference]: Without dead ends: 52 [2019-10-15 01:35:02,767 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=595, Invalid=2827, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:35:02,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-15 01:35:02,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2019-10-15 01:35:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-15 01:35:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2019-10-15 01:35:02,776 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 30 [2019-10-15 01:35:02,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:02,776 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2019-10-15 01:35:02,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-15 01:35:02,777 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2019-10-15 01:35:02,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-15 01:35:02,778 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:02,778 INFO L380 BasicCegarLoop]: trace histogram [12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:02,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:02,987 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:02,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:02,988 INFO L82 PathProgramCache]: Analyzing trace with hash -2059227510, now seen corresponding path program 4 times [2019-10-15 01:35:02,989 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:02,989 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331108858] [2019-10-15 01:35:02,989 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:02,990 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:02,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-10-15 01:35:03,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331108858] [2019-10-15 01:35:03,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463798270] [2019-10-15 01:35:03,164 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 01:35:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:03,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:35:03,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-15 01:35:03,431 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-15 01:35:03,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [107325348] [2019-10-15 01:35:03,764 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:35:03,767 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:03,768 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:03,768 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:03,768 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:03,802 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:04,026 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:35:04,038 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:04,046 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:04,494 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:04,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15, 12] total 47 [2019-10-15 01:35:04,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260859816] [2019-10-15 01:35:04,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-10-15 01:35:04,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:04,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-10-15 01:35:04,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1706, Unknown=0, NotChecked=0, Total=2162 [2019-10-15 01:35:04,499 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 47 states. [2019-10-15 01:35:06,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:06,428 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2019-10-15 01:35:06,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-10-15 01:35:06,428 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 39 [2019-10-15 01:35:06,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:06,429 INFO L225 Difference]: With dead ends: 93 [2019-10-15 01:35:06,430 INFO L226 Difference]: Without dead ends: 68 [2019-10-15 01:35:06,434 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1625, Invalid=6207, Unknown=0, NotChecked=0, Total=7832 [2019-10-15 01:35:06,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-15 01:35:06,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2019-10-15 01:35:06,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-15 01:35:06,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2019-10-15 01:35:06,445 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 39 [2019-10-15 01:35:06,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:06,446 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2019-10-15 01:35:06,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-10-15 01:35:06,446 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2019-10-15 01:35:06,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-15 01:35:06,448 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:06,448 INFO L380 BasicCegarLoop]: trace histogram [26, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:06,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:06,664 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:06,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:06,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1901916396, now seen corresponding path program 5 times [2019-10-15 01:35:06,665 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:06,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775086884] [2019-10-15 01:35:06,666 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:06,666 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:06,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-15 01:35:07,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775086884] [2019-10-15 01:35:07,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105658204] [2019-10-15 01:35:07,058 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:07,259 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-15 01:35:07,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:07,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-15 01:35:07,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2019-10-15 01:35:07,406 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2019-10-15 01:35:07,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1175077497] [2019-10-15 01:35:07,633 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:35:07,633 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:07,634 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:07,634 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:07,634 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:07,659 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:07,837 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:35:07,843 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:07,846 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:08,305 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:08,306 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11, 11, 12] total 58 [2019-10-15 01:35:08,306 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746541970] [2019-10-15 01:35:08,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-10-15 01:35:08,308 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:08,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-10-15 01:35:08,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=2677, Unknown=0, NotChecked=0, Total=3306 [2019-10-15 01:35:08,309 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 58 states. [2019-10-15 01:35:12,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:12,087 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2019-10-15 01:35:12,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-10-15 01:35:12,088 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 55 [2019-10-15 01:35:12,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:12,090 INFO L225 Difference]: With dead ends: 116 [2019-10-15 01:35:12,091 INFO L226 Difference]: Without dead ends: 89 [2019-10-15 01:35:12,096 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3983 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3074, Invalid=13696, Unknown=0, NotChecked=0, Total=16770 [2019-10-15 01:35:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-15 01:35:12,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2019-10-15 01:35:12,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-15 01:35:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2019-10-15 01:35:12,107 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 55 [2019-10-15 01:35:12,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:12,107 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2019-10-15 01:35:12,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-10-15 01:35:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2019-10-15 01:35:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-15 01:35:12,110 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:12,110 INFO L380 BasicCegarLoop]: trace histogram [27, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:12,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:12,314 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:12,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:12,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1270431560, now seen corresponding path program 6 times [2019-10-15 01:35:12,315 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:12,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025050476] [2019-10-15 01:35:12,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:12,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:12,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-10-15 01:35:12,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025050476] [2019-10-15 01:35:12,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441501454] [2019-10-15 01:35:12,787 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:12,941 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:12,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:12,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 01:35:12,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-10-15 01:35:12,964 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-10-15 01:35:13,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1458381401] [2019-10-15 01:35:13,909 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:35:13,910 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:13,910 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:13,910 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:13,911 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:13,931 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:14,070 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:35:14,076 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:14,081 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:14,474 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:14,474 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 12] total 70 [2019-10-15 01:35:14,474 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314106248] [2019-10-15 01:35:14,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-10-15 01:35:14,476 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:14,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-10-15 01:35:14,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1745, Invalid=3085, Unknown=0, NotChecked=0, Total=4830 [2019-10-15 01:35:14,479 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 70 states. [2019-10-15 01:35:17,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:17,732 INFO L93 Difference]: Finished difference Result 165 states and 199 transitions. [2019-10-15 01:35:17,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-10-15 01:35:17,733 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 76 [2019-10-15 01:35:17,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:17,734 INFO L225 Difference]: With dead ends: 165 [2019-10-15 01:35:17,734 INFO L226 Difference]: Without dead ends: 118 [2019-10-15 01:35:17,739 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3989 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5114, Invalid=12708, Unknown=0, NotChecked=0, Total=17822 [2019-10-15 01:35:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-15 01:35:17,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2019-10-15 01:35:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-15 01:35:17,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2019-10-15 01:35:17,753 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 76 [2019-10-15 01:35:17,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:17,753 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2019-10-15 01:35:17,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-10-15 01:35:17,753 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2019-10-15 01:35:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-15 01:35:17,755 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:17,755 INFO L380 BasicCegarLoop]: trace histogram [56, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:17,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:17,959 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:17,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:17,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1490670892, now seen corresponding path program 7 times [2019-10-15 01:35:17,960 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:17,960 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633515569] [2019-10-15 01:35:17,960 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:17,960 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:17,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-10-15 01:35:19,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633515569] [2019-10-15 01:35:19,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531004358] [2019-10-15 01:35:19,348 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:19,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-15 01:35:19,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-10-15 01:35:19,561 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-10-15 01:35:23,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1775639148] [2019-10-15 01:35:23,140 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:35:23,140 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:23,140 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:23,140 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:23,141 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:23,163 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:23,300 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:35:23,309 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:23,311 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:23,844 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:23,845 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59, 12] total 128 [2019-10-15 01:35:23,845 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862067118] [2019-10-15 01:35:23,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 128 states [2019-10-15 01:35:23,846 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:23,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2019-10-15 01:35:23,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6820, Invalid=9436, Unknown=0, NotChecked=0, Total=16256 [2019-10-15 01:35:23,850 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand 128 states. [2019-10-15 01:35:33,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:33,577 INFO L93 Difference]: Finished difference Result 223 states and 286 transitions. [2019-10-15 01:35:33,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2019-10-15 01:35:33,578 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 105 [2019-10-15 01:35:33,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:33,580 INFO L225 Difference]: With dead ends: 223 [2019-10-15 01:35:33,580 INFO L226 Difference]: Without dead ends: 176 [2019-10-15 01:35:33,585 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12196 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=20223, Invalid=42027, Unknown=0, NotChecked=0, Total=62250 [2019-10-15 01:35:33,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-10-15 01:35:33,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 167. [2019-10-15 01:35:33,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-10-15 01:35:33,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2019-10-15 01:35:33,605 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 105 [2019-10-15 01:35:33,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:33,605 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2019-10-15 01:35:33,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 128 states. [2019-10-15 01:35:33,606 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2019-10-15 01:35:33,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-15 01:35:33,608 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:33,609 INFO L380 BasicCegarLoop]: trace histogram [114, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:33,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:33,816 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:33,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:33,817 INFO L82 PathProgramCache]: Analyzing trace with hash -278719148, now seen corresponding path program 8 times [2019-10-15 01:35:33,817 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:33,817 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519086720] [2019-10-15 01:35:33,818 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:33,818 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:33,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat