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_two_index_08.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:35:44,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:35:44,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:35:44,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:35:44,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:35:44,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:35:44,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:35:44,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:35:44,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:35:44,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:35:44,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:35:44,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:35:44,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:35:44,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:35:44,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:35:44,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:35:44,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:35:44,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:35:44,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:35:44,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:35:44,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:35:44,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:35:44,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:35:44,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:35:44,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:35:44,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:35:44,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:35:44,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:35:44,229 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 01:35:44,243 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:35:44,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:35:44,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:35:44,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:35:44,245 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:35:44,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:35:44,245 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:35:44,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:35:44,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:35:44,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:35:44,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:35:44,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:35:44,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:35:44,247 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:35:44,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:35:44,247 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:35:44,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:35:44,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:35:44,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:35:44,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:35:44,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:35:44,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:35:44,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:35:44,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:35:44,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:35:44,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:35:44,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:35:44,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:35:44,250 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 01:35:44,547 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:35:44,570 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:35:44,576 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:35:44,578 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:35:44,579 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:35:44,579 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_08.i [2019-10-15 01:35:44,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7de1bd309/f346c36be07f4786ba0bae90ecae7f47/FLAGdf9a08df5 [2019-10-15 01:35:45,129 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:35:45,130 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_08.i [2019-10-15 01:35:45,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7de1bd309/f346c36be07f4786ba0bae90ecae7f47/FLAGdf9a08df5 [2019-10-15 01:35:45,558 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7de1bd309/f346c36be07f4786ba0bae90ecae7f47 [2019-10-15 01:35:45,568 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:35:45,570 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:35:45,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:45,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:35:45,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:35:45,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2347579a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45, skipping insertion in model container [2019-10-15 01:35:45,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,587 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:35:45,608 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:35:45,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:45,789 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:35:45,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:45,905 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:35:45,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45 WrapperNode [2019-10-15 01:35:45,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:45,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:35:45,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:35:45,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:35:45,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (1/1) ... [2019-10-15 01:35:45,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:35:45,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:35:45,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:35:45,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:35:45,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (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 01:35:46,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:35:46,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:35:46,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:35:46,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:35:46,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:35:46,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:35:46,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:35:46,005 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:35:46,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:35:46,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:35:46,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:35:46,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:35:46,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:35:46,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:35:46,349 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:35:46,349 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:35:46,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:46 BoogieIcfgContainer [2019-10-15 01:35:46,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:35:46,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:35:46,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:35:46,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:35:46,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:35:45" (1/3) ... [2019-10-15 01:35:46,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3515b26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:46, skipping insertion in model container [2019-10-15 01:35:46,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:45" (2/3) ... [2019-10-15 01:35:46,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3515b26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:46, skipping insertion in model container [2019-10-15 01:35:46,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:46" (3/3) ... [2019-10-15 01:35:46,358 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_08.i [2019-10-15 01:35:46,368 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:35:46,376 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:35:46,387 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:35:46,411 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:35:46,411 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:35:46,411 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:35:46,412 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:35:46,412 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:35:46,412 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:35:46,412 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:35:46,412 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:35:46,429 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:35:46,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:35:46,437 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:46,438 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:46,441 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:46,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:46,446 INFO L82 PathProgramCache]: Analyzing trace with hash 328370140, now seen corresponding path program 1 times [2019-10-15 01:35:46,453 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:46,453 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231977252] [2019-10-15 01:35:46,454 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,454 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:46,602 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 01:35:46,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231977252] [2019-10-15 01:35:46,604 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:46,604 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:46,604 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167427609] [2019-10-15 01:35:46,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:46,610 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:46,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:46,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:46,624 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-15 01:35:46,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:46,684 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-10-15 01:35:46,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:46,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:35:46,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:46,693 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:35:46,694 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:35:46,697 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 01:35:46,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:35:46,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:35:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:35:46,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-15 01:35:46,733 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2019-10-15 01:35:46,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:46,734 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-15 01:35:46,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:46,734 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-15 01:35:46,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:35:46,735 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:46,736 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:46,736 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:46,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:46,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1896737256, now seen corresponding path program 1 times [2019-10-15 01:35:46,737 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:46,737 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443111522] [2019-10-15 01:35:46,737 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,737 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:46,790 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 01:35:46,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443111522] [2019-10-15 01:35:46,791 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:46,791 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:46,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389037840] [2019-10-15 01:35:46,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:46,794 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:46,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:46,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:46,795 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2019-10-15 01:35:46,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:46,831 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-15 01:35:46,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:46,832 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:35:46,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:46,835 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:35:46,835 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:35:46,836 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 01:35:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:35:46,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-10-15 01:35:46,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:35:46,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-15 01:35:46,846 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-10-15 01:35:46,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:46,847 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-15 01:35:46,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:46,847 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-15 01:35:46,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:35:46,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:46,848 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:46,849 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:46,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1718311367, now seen corresponding path program 1 times [2019-10-15 01:35:46,849 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:46,850 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293675189] [2019-10-15 01:35:46,850 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,850 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:46,920 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 01:35:46,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293675189] [2019-10-15 01:35:46,921 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673547117] [2019-10-15 01:35:46,921 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 01:35:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:46,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:35:46,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:47,026 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 01:35:47,026 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:47,072 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 01:35:47,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [608663884] [2019-10-15 01:35:47,122 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:47,122 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:47,130 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:47,143 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:47,144 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:47,304 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:47,739 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2019-10-15 01:35:47,821 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:47,837 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:47,845 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:48,238 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:48,238 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:35:48,239 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461888100] [2019-10-15 01:35:48,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:35:48,241 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:48,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:35:48,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:35:48,245 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 18 states. [2019-10-15 01:35:49,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:49,061 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2019-10-15 01:35:49,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:35:49,062 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-10-15 01:35:49,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:49,063 INFO L225 Difference]: With dead ends: 50 [2019-10-15 01:35:49,063 INFO L226 Difference]: Without dead ends: 39 [2019-10-15 01:35:49,064 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 01:35:49,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-15 01:35:49,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2019-10-15 01:35:49,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:35:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-15 01:35:49,072 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-10-15 01:35:49,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:49,073 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-15 01:35:49,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:35:49,073 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-15 01:35:49,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:35:49,074 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:49,074 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:49,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:49,278 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:49,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:49,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1363999975, now seen corresponding path program 2 times [2019-10-15 01:35:49,278 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:49,279 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731073092] [2019-10-15 01:35:49,279 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:49,279 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:49,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:49,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731073092] [2019-10-15 01:35:49,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405707441] [2019-10-15 01:35:49,373 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 01:35:49,431 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:35:49,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:49,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:35:49,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:49,461 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:49,517 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1709614400] [2019-10-15 01:35:49,518 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:49,519 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:49,519 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:49,520 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:49,520 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:49,574 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:49,923 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:49,944 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:49,951 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:50,259 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:50,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 11] total 21 [2019-10-15 01:35:50,260 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921022915] [2019-10-15 01:35:50,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-15 01:35:50,264 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:50,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-15 01:35:50,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:35:50,265 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 21 states. [2019-10-15 01:35:51,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:51,273 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2019-10-15 01:35:51,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 01:35:51,274 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2019-10-15 01:35:51,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:51,276 INFO L225 Difference]: With dead ends: 73 [2019-10-15 01:35:51,276 INFO L226 Difference]: Without dead ends: 60 [2019-10-15 01:35:51,277 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=436, Invalid=1456, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:35:51,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-15 01:35:51,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 32. [2019-10-15 01:35:51,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:35:51,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-15 01:35:51,288 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2019-10-15 01:35:51,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:51,288 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-15 01:35:51,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-15 01:35:51,289 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-15 01:35:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:35:51,289 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:51,290 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:51,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:51,494 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:51,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:51,495 INFO L82 PathProgramCache]: Analyzing trace with hash 311824988, now seen corresponding path program 3 times [2019-10-15 01:35:51,495 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:51,495 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347285914] [2019-10-15 01:35:51,495 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:51,495 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:51,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:35:51,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347285914] [2019-10-15 01:35:51,698 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711621894] [2019-10-15 01:35:51,698 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 01:35:51,768 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:51,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:51,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-15 01:35:51,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:35:51,858 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:35:51,996 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [712651530] [2019-10-15 01:35:51,998 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:51,998 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:51,998 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:51,999 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:51,999 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:52,028 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:52,338 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:52,351 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:52,357 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:52,710 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:52,710 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 39 [2019-10-15 01:35:52,710 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534388924] [2019-10-15 01:35:52,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-15 01:35:52,711 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:52,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-15 01:35:52,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=995, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:35:52,713 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 39 states. [2019-10-15 01:35:54,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:54,594 INFO L93 Difference]: Finished difference Result 108 states and 141 transitions. [2019-10-15 01:35:54,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-15 01:35:54,594 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 28 [2019-10-15 01:35:54,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:54,596 INFO L225 Difference]: With dead ends: 108 [2019-10-15 01:35:54,596 INFO L226 Difference]: Without dead ends: 90 [2019-10-15 01:35:54,599 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1816, Invalid=4990, Unknown=0, NotChecked=0, Total=6806 [2019-10-15 01:35:54,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-15 01:35:54,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 53. [2019-10-15 01:35:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-15 01:35:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2019-10-15 01:35:54,612 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 28 [2019-10-15 01:35:54,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:54,613 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2019-10-15 01:35:54,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-15 01:35:54,613 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2019-10-15 01:35:54,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 01:35:54,614 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:54,615 INFO L380 BasicCegarLoop]: trace histogram [26, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:54,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:54,818 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:54,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:54,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1394133595, now seen corresponding path program 4 times [2019-10-15 01:35:54,819 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:54,820 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623705354] [2019-10-15 01:35:54,820 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:54,820 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:54,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-15 01:35:55,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623705354] [2019-10-15 01:35:55,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670023298] [2019-10-15 01:35:55,042 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 01:35:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:55,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-15 01:35:55,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 01:35:55,376 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:56,084 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 01:35:56,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [911167761] [2019-10-15 01:35:56,086 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:56,086 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:56,100 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:56,101 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:56,101 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:56,126 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:56,404 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:56,416 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:56,419 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:56,705 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:56,705 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 29, 29, 11] total 75 [2019-10-15 01:35:56,705 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489854798] [2019-10-15 01:35:56,707 INFO L442 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-10-15 01:35:56,707 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:56,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-10-15 01:35:56,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2233, Invalid=3317, Unknown=0, NotChecked=0, Total=5550 [2019-10-15 01:35:56,713 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 75 states. [2019-10-15 01:36:01,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:01,415 INFO L93 Difference]: Finished difference Result 169 states and 228 transitions. [2019-10-15 01:36:01,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-10-15 01:36:01,416 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 49 [2019-10-15 01:36:01,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:01,417 INFO L225 Difference]: With dead ends: 169 [2019-10-15 01:36:01,418 INFO L226 Difference]: Without dead ends: 148 [2019-10-15 01:36:01,424 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9281 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7837, Invalid=17923, Unknown=0, NotChecked=0, Total=25760 [2019-10-15 01:36:01,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-10-15 01:36:01,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 94. [2019-10-15 01:36:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-15 01:36:01,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2019-10-15 01:36:01,443 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 49 [2019-10-15 01:36:01,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:01,443 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2019-10-15 01:36:01,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-10-15 01:36:01,443 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2019-10-15 01:36:01,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-15 01:36:01,446 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:01,446 INFO L380 BasicCegarLoop]: trace histogram [62, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:01,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:01,651 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:01,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:01,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1422778532, now seen corresponding path program 5 times [2019-10-15 01:36:01,652 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:01,652 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818648228] [2019-10-15 01:36:01,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:01,653 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:01,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2089 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2019-10-15 01:36:01,986 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818648228] [2019-10-15 01:36:01,986 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775170463] [2019-10-15 01:36:01,987 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 01:36:18,943 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-15 01:36:18,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:18,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-15 01:36:18,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2089 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2019-10-15 01:36:18,973 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2089 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2019-10-15 01:36:19,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1231477307] [2019-10-15 01:36:19,357 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:36:19,357 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:19,357 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:19,357 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:19,357 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:19,379 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:19,648 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:36:19,656 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:19,659 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:19,968 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:19,968 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 11] total 47 [2019-10-15 01:36:19,968 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727701289] [2019-10-15 01:36:19,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-10-15 01:36:19,969 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:19,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-10-15 01:36:19,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=766, Invalid=1396, Unknown=0, NotChecked=0, Total=2162 [2019-10-15 01:36:19,971 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 47 states. [2019-10-15 01:36:24,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:24,065 INFO L93 Difference]: Finished difference Result 227 states and 279 transitions. [2019-10-15 01:36:24,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-10-15 01:36:24,065 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 90 [2019-10-15 01:36:24,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:24,069 INFO L225 Difference]: With dead ends: 227 [2019-10-15 01:36:24,069 INFO L226 Difference]: Without dead ends: 218 [2019-10-15 01:36:24,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4035 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4206, Invalid=10556, Unknown=0, NotChecked=0, Total=14762 [2019-10-15 01:36:24,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-10-15 01:36:24,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 112. [2019-10-15 01:36:24,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-15 01:36:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2019-10-15 01:36:24,107 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 90 [2019-10-15 01:36:24,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:24,107 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2019-10-15 01:36:24,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-10-15 01:36:24,108 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2019-10-15 01:36:24,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 01:36:24,110 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:24,110 INFO L380 BasicCegarLoop]: trace histogram [62, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:24,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:24,323 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:24,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:24,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1547036028, now seen corresponding path program 6 times [2019-10-15 01:36:24,324 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:24,324 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066788717] [2019-10-15 01:36:24,325 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:24,325 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:24,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2548 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2019-10-15 01:36:25,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066788717] [2019-10-15 01:36:25,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720674810] [2019-10-15 01:36:25,214 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 01:36:25,383 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:36:25,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:25,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 64 conjunts are in the unsatisfiable core [2019-10-15 01:36:25,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2548 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2019-10-15 01:36:25,887 INFO L321 TraceCheckSpWp]: Computing backward predicates...