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_init7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:34:09,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:34:09,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:34:09,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:34:09,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:34:09,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:34:09,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:34:09,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:34:09,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:34:09,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:34:09,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:34:09,584 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:34:09,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:34:09,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:34:09,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:34:09,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:34:09,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:34:09,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:34:09,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:34:09,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:34:09,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:34:09,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:34:09,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:34:09,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:34:09,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:34:09,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:34:09,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:34:09,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:34:09,635 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:34:09,655 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:34:09,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:34:09,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:34:09,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:34:09,657 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:34:09,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:34:09,658 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:34:09,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:34:09,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:34:09,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:34:09,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:34:09,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:34:09,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:34:09,660 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:34:09,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:34:09,661 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:34:09,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:34:09,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:34:09,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:34:09,662 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:34:09,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:34:09,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:09,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:34:09,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:34:09,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:34:09,663 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:34:09,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:34:09,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:34:09,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:34:09,948 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:34:09,961 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:34:09,965 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:34:09,967 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:34:09,967 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:34:09,968 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2019-10-15 01:34:10,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5767da04/b76dd1fd37954fe89bb7fe6aba37640a/FLAG91e058674 [2019-10-15 01:34:10,541 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:34:10,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2019-10-15 01:34:10,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5767da04/b76dd1fd37954fe89bb7fe6aba37640a/FLAG91e058674 [2019-10-15 01:34:10,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5767da04/b76dd1fd37954fe89bb7fe6aba37640a [2019-10-15 01:34:10,979 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:10,980 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:10,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:10,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:10,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:10,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:10" (1/1) ... [2019-10-15 01:34:10,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5627da55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:10, skipping insertion in model container [2019-10-15 01:34:10,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:10" (1/1) ... [2019-10-15 01:34:10,995 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:11,013 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:11,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:11,215 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:11,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:11,335 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:11,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:11 WrapperNode [2019-10-15 01:34:11,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:11,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:11,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:11,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:11,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:11" (1/1) ... [2019-10-15 01:34:11,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:11" (1/1) ... [2019-10-15 01:34:11,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:11" (1/1) ... [2019-10-15 01:34:11,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:11" (1/1) ... [2019-10-15 01:34:11,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:11" (1/1) ... [2019-10-15 01:34:11,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:11" (1/1) ... [2019-10-15 01:34:11,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:11" (1/1) ... [2019-10-15 01:34:11,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:11,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:11,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:11,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:11,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:11,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:11,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:11,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:11,450 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:11,450 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:11,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:11,845 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:11,846 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-15 01:34:11,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:11 BoogieIcfgContainer [2019-10-15 01:34:11,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:11,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:11,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:11,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:11,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:10" (1/3) ... [2019-10-15 01:34:11,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce526fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:11, skipping insertion in model container [2019-10-15 01:34:11,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:11" (2/3) ... [2019-10-15 01:34:11,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce526fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:11, skipping insertion in model container [2019-10-15 01:34:11,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:11" (3/3) ... [2019-10-15 01:34:11,855 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-2.i [2019-10-15 01:34:11,865 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:11,872 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:11,882 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:11,904 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:11,904 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:11,904 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:11,904 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:11,904 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:11,905 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:11,905 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:11,905 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:11,920 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-15 01:34:11,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:34:11,927 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:11,928 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 01:34:11,930 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:11,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:11,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1872680520, now seen corresponding path program 1 times [2019-10-15 01:34:11,945 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:11,945 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010621976] [2019-10-15 01:34:11,946 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:11,946 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:11,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:34:12,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010621976] [2019-10-15 01:34:12,102 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:12,103 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:12,104 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3767132] [2019-10-15 01:34:12,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:12,109 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:12,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:12,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:12,131 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-10-15 01:34:12,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:12,275 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2019-10-15 01:34:12,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:12,277 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-15 01:34:12,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:12,287 INFO L225 Difference]: With dead ends: 49 [2019-10-15 01:34:12,287 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:34:12,293 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:12,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:34:12,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-15 01:34:12,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 01:34:12,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-10-15 01:34:12,349 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2019-10-15 01:34:12,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:12,351 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-10-15 01:34:12,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:12,352 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-10-15 01:34:12,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:34:12,354 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:12,354 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 01:34:12,355 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:12,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:12,357 INFO L82 PathProgramCache]: Analyzing trace with hash 802380745, now seen corresponding path program 1 times [2019-10-15 01:34:12,357 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:12,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914031179] [2019-10-15 01:34:12,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:12,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:12,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:12,461 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 01:34:12,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914031179] [2019-10-15 01:34:12,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349367538] [2019-10-15 01:34:12,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:12,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:12,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:12,565 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 01:34:12,565 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:12,604 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 01:34:12,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [259533974] [2019-10-15 01:34:12,630 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:34:12,630 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:12,637 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:12,646 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:12,647 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:12,876 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:14,209 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:14,227 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:14,235 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:14,873 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:14,873 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:34:14,873 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117190108] [2019-10-15 01:34:14,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:34:14,876 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:14,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:34:14,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:34:14,877 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 17 states. [2019-10-15 01:34:15,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:15,890 INFO L93 Difference]: Finished difference Result 79 states and 113 transitions. [2019-10-15 01:34:15,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:34:15,891 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-10-15 01:34:15,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:15,893 INFO L225 Difference]: With dead ends: 79 [2019-10-15 01:34:15,893 INFO L226 Difference]: Without dead ends: 58 [2019-10-15 01:34:15,896 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:34:15,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-15 01:34:15,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2019-10-15 01:34:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-15 01:34:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2019-10-15 01:34:15,915 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 24 [2019-10-15 01:34:15,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:15,918 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2019-10-15 01:34:15,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:34:15,919 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2019-10-15 01:34:15,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-15 01:34:15,921 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:15,921 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:16,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:16,126 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:16,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:16,127 INFO L82 PathProgramCache]: Analyzing trace with hash -968414200, now seen corresponding path program 2 times [2019-10-15 01:34:16,127 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:16,127 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24234704] [2019-10-15 01:34:16,127 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:16,128 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:16,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-15 01:34:16,305 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24234704] [2019-10-15 01:34:16,305 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730939991] [2019-10-15 01:34:16,306 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:16,415 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:34:16,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:16,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:34:16,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-15 01:34:16,431 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-15 01:34:16,495 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1934159007] [2019-10-15 01:34:16,497 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:34:16,498 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:16,499 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:16,500 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:16,500 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:16,527 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:17,386 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:17,398 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:17,402 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:18,183 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:18,183 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:34:18,183 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016487864] [2019-10-15 01:34:18,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:34:18,185 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:18,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:34:18,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:34:18,185 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 23 states. [2019-10-15 01:34:19,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:19,301 INFO L93 Difference]: Finished difference Result 139 states and 194 transitions. [2019-10-15 01:34:19,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:34:19,302 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2019-10-15 01:34:19,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:19,306 INFO L225 Difference]: With dead ends: 139 [2019-10-15 01:34:19,306 INFO L226 Difference]: Without dead ends: 100 [2019-10-15 01:34:19,307 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 102 SyntacticMatches, 30 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:34:19,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-15 01:34:19,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2019-10-15 01:34:19,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-15 01:34:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2019-10-15 01:34:19,324 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 45 [2019-10-15 01:34:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:19,325 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2019-10-15 01:34:19,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:34:19,325 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2019-10-15 01:34:19,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-15 01:34:19,327 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:19,328 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:19,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:19,531 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:19,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:19,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1028419416, now seen corresponding path program 3 times [2019-10-15 01:34:19,532 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:19,532 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112828901] [2019-10-15 01:34:19,532 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:19,532 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:19,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-15 01:34:19,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112828901] [2019-10-15 01:34:19,762 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3315001] [2019-10-15 01:34:19,762 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:19,888 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:34:19,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:19,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:34:19,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-15 01:34:19,936 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-15 01:34:20,132 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [704304981] [2019-10-15 01:34:20,134 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:34:20,134 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:20,134 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:20,135 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:20,135 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:20,180 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:20,791 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:20,797 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:20,804 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:22,185 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:22,185 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:34:22,185 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634413881] [2019-10-15 01:34:22,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:34:22,187 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:22,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:34:22,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:34:22,188 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand 35 states. [2019-10-15 01:34:24,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:24,316 INFO L93 Difference]: Finished difference Result 259 states and 356 transitions. [2019-10-15 01:34:24,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:34:24,316 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 87 [2019-10-15 01:34:24,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:24,319 INFO L225 Difference]: With dead ends: 259 [2019-10-15 01:34:24,320 INFO L226 Difference]: Without dead ends: 184 [2019-10-15 01:34:24,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 175 SyntacticMatches, 66 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3317 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:34:24,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-10-15 01:34:24,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 175. [2019-10-15 01:34:24,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:34:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 182 transitions. [2019-10-15 01:34:24,352 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 182 transitions. Word has length 87 [2019-10-15 01:34:24,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:24,353 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 182 transitions. [2019-10-15 01:34:24,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:34:24,353 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 182 transitions. [2019-10-15 01:34:24,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-15 01:34:24,360 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:24,361 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:24,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:24,565 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:24,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:24,566 INFO L82 PathProgramCache]: Analyzing trace with hash 521847272, now seen corresponding path program 4 times [2019-10-15 01:34:24,566 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:24,566 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716950865] [2019-10-15 01:34:24,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:24,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:24,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2019-10-15 01:34:25,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716950865] [2019-10-15 01:34:25,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708054418] [2019-10-15 01:34:25,132 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:25,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:34:25,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2019-10-15 01:34:25,337 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2019-10-15 01:34:26,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1477931584] [2019-10-15 01:34:26,253 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:34:26,253 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:26,254 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:26,254 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:26,254 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:26,280 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:26,905 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:26,912 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:26,914 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:30,509 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:30,509 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:34:30,509 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549949138] [2019-10-15 01:34:30,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:34:30,511 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:30,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:34:30,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:34:30,513 INFO L87 Difference]: Start difference. First operand 175 states and 182 transitions. Second operand 59 states. [2019-10-15 01:34:35,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:35,293 INFO L93 Difference]: Finished difference Result 499 states and 680 transitions. [2019-10-15 01:34:35,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:34:35,294 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 171 [2019-10-15 01:34:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:35,297 INFO L225 Difference]: With dead ends: 499 [2019-10-15 01:34:35,297 INFO L226 Difference]: Without dead ends: 352 [2019-10-15 01:34:35,301 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 343 SyntacticMatches, 138 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12551 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:34:35,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2019-10-15 01:34:35,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 343. [2019-10-15 01:34:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-10-15 01:34:35,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 350 transitions. [2019-10-15 01:34:35,344 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 350 transitions. Word has length 171 [2019-10-15 01:34:35,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:35,345 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 350 transitions. [2019-10-15 01:34:35,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:34:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 350 transitions. [2019-10-15 01:34:35,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2019-10-15 01:34:35,360 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:35,360 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:35,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:35,569 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:35,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:35,570 INFO L82 PathProgramCache]: Analyzing trace with hash -769997720, now seen corresponding path program 5 times [2019-10-15 01:34:35,570 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:35,570 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731192953] [2019-10-15 01:34:35,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:35,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:35,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7567 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 6486 trivial. 0 not checked. [2019-10-15 01:34:37,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731192953] [2019-10-15 01:34:37,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112086117] [2019-10-15 01:34:37,109 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