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_copy6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:32:42,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:32:42,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:32:42,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:32:42,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:32:42,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:32:42,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:32:42,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:32:42,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:32:42,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:32:42,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:32:42,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:32:42,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:32:42,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:32:42,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:32:42,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:32:42,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:32:42,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:32:42,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:32:42,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:32:42,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:32:42,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:32:42,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:32:42,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:32:42,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:32:42,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:32:42,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:32:42,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:32:42,530 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 01:32:42,549 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:32:42,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:32:42,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:32:42,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:32:42,552 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:32:42,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:32:42,552 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:32:42,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:32:42,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:32:42,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:32:42,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:32:42,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:32:42,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:32:42,554 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:32:42,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:32:42,555 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:32:42,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:32:42,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:32:42,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:32:42,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:32:42,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:32:42,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:32:42,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:32:42,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:32:42,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:32:42,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:32:42,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:32:42,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:32:42,558 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 01:32:42,825 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:32:42,837 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:32:42,841 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:32:42,843 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:32:42,843 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:32:42,844 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-2.i [2019-10-15 01:32:42,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cc426b3f/6389f8b56a6c47f3ae3b92dfd247ac2c/FLAGc979d6c2f [2019-10-15 01:32:43,366 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:32:43,367 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy6_ground-2.i [2019-10-15 01:32:43,376 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cc426b3f/6389f8b56a6c47f3ae3b92dfd247ac2c/FLAGc979d6c2f [2019-10-15 01:32:43,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cc426b3f/6389f8b56a6c47f3ae3b92dfd247ac2c [2019-10-15 01:32:43,766 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:32:43,768 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:32:43,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:32:43,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:32:43,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:32:43,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:32:43" (1/1) ... [2019-10-15 01:32:43,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f1e481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:43, skipping insertion in model container [2019-10-15 01:32:43,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:32:43" (1/1) ... [2019-10-15 01:32:43,785 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:32:43,803 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:32:44,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:32:44,043 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:32:44,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:32:44,207 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:32:44,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:44 WrapperNode [2019-10-15 01:32:44,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:32:44,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:32:44,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:32:44,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:32:44,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:44" (1/1) ... [2019-10-15 01:32:44,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:44" (1/1) ... [2019-10-15 01:32:44,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:44" (1/1) ... [2019-10-15 01:32:44,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:44" (1/1) ... [2019-10-15 01:32:44,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:44" (1/1) ... [2019-10-15 01:32:44,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:44" (1/1) ... [2019-10-15 01:32:44,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:44" (1/1) ... [2019-10-15 01:32:44,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:32:44,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:32:44,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:32:44,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:32:44,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:44" (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 01:32:44,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:32:44,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:32:44,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:32:44,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:32:44,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:32:44,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:32:44,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:32:44,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:32:44,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:32:44,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:32:44,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:32:44,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:32:44,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:32:44,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:32:44,861 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:32:44,861 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-15 01:32:44,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:32:44 BoogieIcfgContainer [2019-10-15 01:32:44,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:32:44,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:32:44,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:32:44,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:32:44,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:32:43" (1/3) ... [2019-10-15 01:32:44,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7938c7c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:32:44, skipping insertion in model container [2019-10-15 01:32:44,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:44" (2/3) ... [2019-10-15 01:32:44,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7938c7c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:32:44, skipping insertion in model container [2019-10-15 01:32:44,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:32:44" (3/3) ... [2019-10-15 01:32:44,871 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-2.i [2019-10-15 01:32:44,880 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:32:44,888 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:32:44,900 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:32:44,925 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:32:44,925 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:32:44,925 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:32:44,925 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:32:44,926 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:32:44,926 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:32:44,926 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:32:44,926 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:32:44,943 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-15 01:32:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:32:44,949 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:44,950 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:44,952 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:44,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:44,958 INFO L82 PathProgramCache]: Analyzing trace with hash 385694572, now seen corresponding path program 1 times [2019-10-15 01:32:44,968 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:44,968 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884303128] [2019-10-15 01:32:44,969 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:44,969 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:44,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:45,145 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 01:32:45,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884303128] [2019-10-15 01:32:45,147 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:45,148 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:32:45,149 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683566202] [2019-10-15 01:32:45,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:32:45,154 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:45,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:32:45,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:45,172 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-10-15 01:32:45,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:45,210 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2019-10-15 01:32:45,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:45,212 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-15 01:32:45,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:45,221 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:32:45,222 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:32:45,225 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 01:32:45,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:32:45,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 01:32:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:32:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2019-10-15 01:32:45,274 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 17 [2019-10-15 01:32:45,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:45,275 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2019-10-15 01:32:45,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:45,276 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2019-10-15 01:32:45,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:32:45,277 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:45,277 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:45,278 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:45,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:45,278 INFO L82 PathProgramCache]: Analyzing trace with hash 927885985, now seen corresponding path program 1 times [2019-10-15 01:32:45,279 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:45,279 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614353998] [2019-10-15 01:32:45,279 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:45,280 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:45,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:45,368 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 01:32:45,368 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614353998] [2019-10-15 01:32:45,369 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:45,369 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:32:45,369 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424282219] [2019-10-15 01:32:45,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:32:45,371 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:45,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:32:45,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:45,372 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 3 states. [2019-10-15 01:32:45,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:45,451 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2019-10-15 01:32:45,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:45,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-15 01:32:45,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:45,455 INFO L225 Difference]: With dead ends: 42 [2019-10-15 01:32:45,455 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:32:45,456 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 01:32:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:32:45,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-15 01:32:45,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 01:32:45,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-10-15 01:32:45,468 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2019-10-15 01:32:45,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:45,469 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-10-15 01:32:45,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:45,469 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-10-15 01:32:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:32:45,471 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:45,472 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:45,472 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:45,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1980665252, now seen corresponding path program 1 times [2019-10-15 01:32:45,474 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:45,475 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435167036] [2019-10-15 01:32:45,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:45,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:45,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:32:45,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435167036] [2019-10-15 01:32:45,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307540229] [2019-10-15 01:32:45,600 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 01:32:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:45,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:32:45,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:32:45,719 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:32:45,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1002030450] [2019-10-15 01:32:45,803 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:32:45,804 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:45,811 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:45,819 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:45,820 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:46,045 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:46,517 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:32:46,875 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:32:47,170 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:32:47,990 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:48,020 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:48,031 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:48,597 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:48,597 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:32:48,597 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145155339] [2019-10-15 01:32:48,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:32:48,602 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:48,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:32:48,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:32:48,604 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 18 states. [2019-10-15 01:32:49,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:49,358 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2019-10-15 01:32:49,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:32:49,360 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2019-10-15 01:32:49,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:49,361 INFO L225 Difference]: With dead ends: 67 [2019-10-15 01:32:49,361 INFO L226 Difference]: Without dead ends: 46 [2019-10-15 01:32:49,362 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-10-15 01:32:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-15 01:32:49,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2019-10-15 01:32:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 01:32:49,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2019-10-15 01:32:49,384 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 24 [2019-10-15 01:32:49,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:49,385 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2019-10-15 01:32:49,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:32:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2019-10-15 01:32:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 01:32:49,386 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:49,386 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:49,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:49,597 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:49,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1231684532, now seen corresponding path program 2 times [2019-10-15 01:32:49,597 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:49,597 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397520303] [2019-10-15 01:32:49,597 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:49,598 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:49,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:32:49,716 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397520303] [2019-10-15 01:32:49,716 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52095187] [2019-10-15 01:32:49,716 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 01:32:49,809 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:32:49,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:49,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:32:49,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-15 01:32:49,849 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-15 01:32:49,885 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1621753927] [2019-10-15 01:32:49,887 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:32:49,889 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:49,890 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:49,890 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:49,890 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:49,922 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:50,641 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:32:51,375 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:51,386 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:51,390 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:51,704 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:51,704 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 11] total 23 [2019-10-15 01:32:51,704 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477040266] [2019-10-15 01:32:51,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:32:51,719 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:51,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:32:51,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:32:51,720 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 23 states. [2019-10-15 01:32:52,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:52,823 INFO L93 Difference]: Finished difference Result 98 states and 136 transitions. [2019-10-15 01:32:52,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-15 01:32:52,829 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 33 [2019-10-15 01:32:52,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:52,830 INFO L225 Difference]: With dead ends: 98 [2019-10-15 01:32:52,830 INFO L226 Difference]: Without dead ends: 71 [2019-10-15 01:32:52,834 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2019-10-15 01:32:52,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-15 01:32:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2019-10-15 01:32:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-15 01:32:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2019-10-15 01:32:52,853 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 33 [2019-10-15 01:32:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:52,854 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2019-10-15 01:32:52,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:32:52,854 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2019-10-15 01:32:52,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-15 01:32:52,860 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:52,860 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:53,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:53,065 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:53,066 INFO L82 PathProgramCache]: Analyzing trace with hash -652484159, now seen corresponding path program 3 times [2019-10-15 01:32:53,066 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:53,066 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373380046] [2019-10-15 01:32:53,066 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:53,067 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:53,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-15 01:32:53,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373380046] [2019-10-15 01:32:53,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304190308] [2019-10-15 01:32:53,244 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 01:32:53,383 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:53,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:53,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:32:53,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-15 01:32:53,410 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-15 01:32:53,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [424655554] [2019-10-15 01:32:53,475 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:32:53,475 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:53,476 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:53,476 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:53,476 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:53,497 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:54,296 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:32:54,749 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:54,759 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:54,762 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:55,038 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:55,039 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 01:32:55,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856675463] [2019-10-15 01:32:55,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:32:55,040 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:55,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:32:55,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:32:55,041 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 25 states. [2019-10-15 01:32:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:55,852 INFO L93 Difference]: Finished difference Result 129 states and 149 transitions. [2019-10-15 01:32:55,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-15 01:32:55,853 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2019-10-15 01:32:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:55,855 INFO L225 Difference]: With dead ends: 129 [2019-10-15 01:32:55,855 INFO L226 Difference]: Without dead ends: 78 [2019-10-15 01:32:55,857 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:32:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-15 01:32:55,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2019-10-15 01:32:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-15 01:32:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2019-10-15 01:32:55,869 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 58 [2019-10-15 01:32:55,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:55,869 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2019-10-15 01:32:55,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:32:55,869 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2019-10-15 01:32:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-15 01:32:55,871 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:55,871 INFO L380 BasicCegarLoop]: trace histogram [12, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:56,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:56,075 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:56,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:56,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1192954356, now seen corresponding path program 4 times [2019-10-15 01:32:56,076 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:56,076 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713437147] [2019-10-15 01:32:56,076 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:56,076 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:56,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-15 01:32:56,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713437147] [2019-10-15 01:32:56,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2288223] [2019-10-15 01:32:56,310 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 01:32:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:56,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:32:56,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-15 01:32:56,464 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-15 01:32:56,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [981082840] [2019-10-15 01:32:56,705 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:32:56,705 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:56,706 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:56,706 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:56,706 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:56,730 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:57,967 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:57,972 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:57,975 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:58,312 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:58,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-15 01:32:58,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204587920] [2019-10-15 01:32:58,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-15 01:32:58,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:58,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-15 01:32:58,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1047, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:32:58,315 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand 39 states. [2019-10-15 01:32:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:59,646 INFO L93 Difference]: Finished difference Result 143 states and 170 transitions. [2019-10-15 01:32:59,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-15 01:32:59,646 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 65 [2019-10-15 01:32:59,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:59,649 INFO L225 Difference]: With dead ends: 143 [2019-10-15 01:32:59,649 INFO L226 Difference]: Without dead ends: 92 [2019-10-15 01:32:59,651 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1244, Invalid=3868, Unknown=0, NotChecked=0, Total=5112 [2019-10-15 01:32:59,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-15 01:32:59,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2019-10-15 01:32:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-15 01:32:59,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2019-10-15 01:32:59,663 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 65 [2019-10-15 01:32:59,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:59,664 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2019-10-15 01:32:59,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-15 01:32:59,664 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2019-10-15 01:32:59,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-15 01:32:59,665 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:59,666 INFO L380 BasicCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:59,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:59,870 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:59,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:59,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1089225620, now seen corresponding path program 5 times [2019-10-15 01:32:59,871 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:59,872 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904448082] [2019-10-15 01:32:59,872 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:59,872 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:59,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-15 01:33:00,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904448082] [2019-10-15 01:33:00,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514284588] [2019-10-15 01:33:00,314 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 01:33:01,314 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:33:01,315 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:01,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 01:33:01,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2019-10-15 01:33:01,437 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2019-10-15 01:33:01,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1863309087] [2019-10-15 01:33:01,585 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:33:01,585 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:01,585 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:01,586 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:01,586 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:01,600 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:02,809 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:02,815 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:02,818 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:03,276 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:03,276 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 9, 9, 11] total 53 [2019-10-15 01:33:03,276 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134557773] [2019-10-15 01:33:03,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-10-15 01:33:03,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:03,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-10-15 01:33:03,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=2202, Unknown=0, NotChecked=0, Total=2756 [2019-10-15 01:33:03,280 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 53 states. [2019-10-15 01:33:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:06,348 INFO L93 Difference]: Finished difference Result 192 states and 254 transitions. [2019-10-15 01:33:06,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-15 01:33:06,349 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 79 [2019-10-15 01:33:06,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:06,351 INFO L225 Difference]: With dead ends: 192 [2019-10-15 01:33:06,351 INFO L226 Difference]: Without dead ends: 141 [2019-10-15 01:33:06,354 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1684, Invalid=8416, Unknown=0, NotChecked=0, Total=10100 [2019-10-15 01:33:06,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-10-15 01:33:06,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 132. [2019-10-15 01:33:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-10-15 01:33:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 139 transitions. [2019-10-15 01:33:06,370 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 139 transitions. Word has length 79 [2019-10-15 01:33:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:06,370 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 139 transitions. [2019-10-15 01:33:06,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-10-15 01:33:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 139 transitions. [2019-10-15 01:33:06,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-15 01:33:06,372 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:06,373 INFO L380 BasicCegarLoop]: trace histogram [27, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:06,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:06,576 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:06,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:06,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1390226785, now seen corresponding path program 6 times [2019-10-15 01:33:06,577 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:06,577 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277008083] [2019-10-15 01:33:06,578 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:06,578 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:06,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-10-15 01:33:07,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277008083] [2019-10-15 01:33:07,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942355811] [2019-10-15 01:33:07,104 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 01:33:07,309 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:33:07,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:07,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 01:33:07,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-10-15 01:33:07,356 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-10-15 01:33:08,278 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [712169053] [2019-10-15 01:33:08,280 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:33:08,280 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:08,280 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:08,281 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:08,281 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:08,296 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:09,539 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:09,544 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:09,547 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:10,146 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:10,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 69 [2019-10-15 01:33:10,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372888025] [2019-10-15 01:33:10,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-10-15 01:33:10,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:10,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-10-15 01:33:10,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1740, Invalid=2952, Unknown=0, NotChecked=0, Total=4692 [2019-10-15 01:33:10,150 INFO L87 Difference]: Start difference. First operand 132 states and 139 transitions. Second operand 69 states. [2019-10-15 01:33:13,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:13,334 INFO L93 Difference]: Finished difference Result 269 states and 311 transitions. [2019-10-15 01:33:13,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-10-15 01:33:13,335 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 128 [2019-10-15 01:33:13,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:13,337 INFO L225 Difference]: With dead ends: 269 [2019-10-15 01:33:13,337 INFO L226 Difference]: Without dead ends: 170 [2019-10-15 01:33:13,342 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5099, Invalid=12193, Unknown=0, NotChecked=0, Total=17292 [2019-10-15 01:33:13,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-10-15 01:33:13,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 161. [2019-10-15 01:33:13,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-10-15 01:33:13,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 168 transitions. [2019-10-15 01:33:13,361 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 168 transitions. Word has length 128 [2019-10-15 01:33:13,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:13,361 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 168 transitions. [2019-10-15 01:33:13,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-10-15 01:33:13,361 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 168 transitions. [2019-10-15 01:33:13,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-15 01:33:13,364 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:13,364 INFO L380 BasicCegarLoop]: trace histogram [56, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:13,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:13,568 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:13,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:13,569 INFO L82 PathProgramCache]: Analyzing trace with hash -412242356, now seen corresponding path program 7 times [2019-10-15 01:33:13,569 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:13,569 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897921378] [2019-10-15 01:33:13,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:13,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:13,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-10-15 01:33:14,996 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897921378] [2019-10-15 01:33:14,996 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992246293] [2019-10-15 01:33:14,997 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 01:33:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:15,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-15 01:33:15,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-10-15 01:33:15,290 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-10-15 01:33:18,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [955467474] [2019-10-15 01:33:18,688 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:33:18,688 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:18,688 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:18,688 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:18,689 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:18,710 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:18,969 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:19,393 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:19,611 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:33:19,864 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:33:20,104 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:20,163 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:20,177 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:20,182 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:20,832 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:20,833 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59, 11] total 127 [2019-10-15 01:33:20,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842450855] [2019-10-15 01:33:20,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 127 states [2019-10-15 01:33:20,835 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:20,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2019-10-15 01:33:20,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6815, Invalid=9187, Unknown=0, NotChecked=0, Total=16002 [2019-10-15 01:33:20,841 INFO L87 Difference]: Start difference. First operand 161 states and 168 transitions. Second operand 127 states.