java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_01.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:35:35,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:35:35,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:35:35,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:35:35,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:35:35,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:35:35,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:35:35,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:35:35,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:35:35,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:35:35,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:35:35,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:35:35,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:35:35,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:35:35,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:35:35,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:35:35,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:35:35,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:35:35,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:35:35,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:35:35,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:35:35,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:35:35,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:35:35,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:35:35,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:35:35,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:35:35,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:35:35,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:35:35,542 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:35:35,563 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:35:35,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:35:35,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:35:35,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:35:35,566 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:35:35,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:35:35,566 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:35:35,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:35:35,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:35:35,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:35:35,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:35:35,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:35:35,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:35:35,569 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:35:35,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:35:35,570 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:35:35,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:35:35,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:35:35,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:35:35,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:35:35,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:35:35,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:35:35,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:35:35,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:35:35,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:35:35,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:35:35,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:35:35,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:35:35,573 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:35:35,876 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:35:35,889 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:35:35,893 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:35:35,894 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:35:35,895 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:35:35,895 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_01.i [2019-10-15 01:35:35,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7c2d8516/bfa5a172de3a4593b5b2e76c7aaecdee/FLAGe6fd8425a [2019-10-15 01:35:36,437 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:35:36,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_01.i [2019-10-15 01:35:36,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7c2d8516/bfa5a172de3a4593b5b2e76c7aaecdee/FLAGe6fd8425a [2019-10-15 01:35:36,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7c2d8516/bfa5a172de3a4593b5b2e76c7aaecdee [2019-10-15 01:35:36,784 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:35:36,785 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:35:36,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:36,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:35:36,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:35:36,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:36" (1/1) ... [2019-10-15 01:35:36,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@459c0ee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:36, skipping insertion in model container [2019-10-15 01:35:36,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:36" (1/1) ... [2019-10-15 01:35:36,803 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:35:36,822 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:35:37,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:37,010 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:35:37,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:37,051 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:35:37,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:37 WrapperNode [2019-10-15 01:35:37,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:37,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:35:37,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:35:37,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:35:37,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:37" (1/1) ... [2019-10-15 01:35:37,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:37" (1/1) ... [2019-10-15 01:35:37,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:37" (1/1) ... [2019-10-15 01:35:37,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:37" (1/1) ... [2019-10-15 01:35:37,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:37" (1/1) ... [2019-10-15 01:35:37,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:37" (1/1) ... [2019-10-15 01:35:37,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:37" (1/1) ... [2019-10-15 01:35:37,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:35:37,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:35:37,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:35:37,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:35:37,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:35:37,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:35:37,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:35:37,240 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:35:37,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:35:37,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:35:37,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:35:37,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:35:37,243 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:35:37,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:35:37,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:35:37,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:35:37,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:35:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:35:37,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:35:37,581 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:35:37,581 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:35:37,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:37 BoogieIcfgContainer [2019-10-15 01:35:37,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:35:37,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:35:37,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:35:37,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:35:37,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:35:36" (1/3) ... [2019-10-15 01:35:37,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc9aa84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:37, skipping insertion in model container [2019-10-15 01:35:37,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:37" (2/3) ... [2019-10-15 01:35:37,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc9aa84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:37, skipping insertion in model container [2019-10-15 01:35:37,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:37" (3/3) ... [2019-10-15 01:35:37,591 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_01.i [2019-10-15 01:35:37,599 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:35:37,606 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:35:37,615 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:35:37,639 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:35:37,639 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:35:37,639 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:35:37,639 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:35:37,639 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:35:37,639 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:35:37,640 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:35:37,640 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:35:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:35:37,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:35:37,660 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:37,661 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:37,663 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:37,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:37,669 INFO L82 PathProgramCache]: Analyzing trace with hash 328370140, now seen corresponding path program 1 times [2019-10-15 01:35:37,676 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:37,677 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554391729] [2019-10-15 01:35:37,677 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:37,677 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:37,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:37,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554391729] [2019-10-15 01:35:37,864 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:37,864 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:37,865 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163078955] [2019-10-15 01:35:37,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:37,871 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:37,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:37,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:37,893 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-15 01:35:37,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:37,971 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2019-10-15 01:35:37,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:37,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:35:37,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:37,986 INFO L225 Difference]: With dead ends: 37 [2019-10-15 01:35:37,987 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:35:37,991 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:35:38,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-10-15 01:35:38,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:35:38,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-15 01:35:38,045 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2019-10-15 01:35:38,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:38,045 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-15 01:35:38,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:38,046 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-15 01:35:38,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:35:38,049 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:38,049 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:38,050 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:38,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:38,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1718311367, now seen corresponding path program 1 times [2019-10-15 01:35:38,052 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:38,052 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727419672] [2019-10-15 01:35:38,053 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:38,053 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:38,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:35:38,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727419672] [2019-10-15 01:35:38,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335023813] [2019-10-15 01:35:38,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:38,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:35:38,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:35:38,282 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:35:38,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1734413584] [2019-10-15 01:35:38,375 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:38,376 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:38,381 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:38,388 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:38,389 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:38,550 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:39,051 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2019-10-15 01:35:39,165 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:35:39,187 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:39,197 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:39,545 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:39,546 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:35:39,546 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848005477] [2019-10-15 01:35:39,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:35:39,551 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:39,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:35:39,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:35:39,553 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 17 states. [2019-10-15 01:35:40,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:40,198 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2019-10-15 01:35:40,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:35:40,198 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2019-10-15 01:35:40,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:40,200 INFO L225 Difference]: With dead ends: 51 [2019-10-15 01:35:40,200 INFO L226 Difference]: Without dead ends: 40 [2019-10-15 01:35:40,202 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:35:40,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-15 01:35:40,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2019-10-15 01:35:40,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:35:40,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-15 01:35:40,210 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-10-15 01:35:40,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:40,211 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-15 01:35:40,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:35:40,213 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-15 01:35:40,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:35:40,214 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:40,214 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:40,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:40,419 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:40,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:40,420 INFO L82 PathProgramCache]: Analyzing trace with hash 946085148, now seen corresponding path program 2 times [2019-10-15 01:35:40,420 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:40,420 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134709702] [2019-10-15 01:35:40,420 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:40,421 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:40,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:35:40,530 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134709702] [2019-10-15 01:35:40,530 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271018122] [2019-10-15 01:35:40,530 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:40,609 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:35:40,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:40,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:35:40,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:35:40,642 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:35:40,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1931668412] [2019-10-15 01:35:40,693 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:40,693 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:40,694 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:40,694 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:40,694 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:40,733 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:41,080 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:35:41,120 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:41,128 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:41,432 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:41,432 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-10-15 01:35:41,432 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867987796] [2019-10-15 01:35:41,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:35:41,434 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:41,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:35:41,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:35:41,435 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 23 states. [2019-10-15 01:35:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:42,533 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2019-10-15 01:35:42,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:35:42,533 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2019-10-15 01:35:42,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:42,535 INFO L225 Difference]: With dead ends: 84 [2019-10-15 01:35:42,536 INFO L226 Difference]: Without dead ends: 70 [2019-10-15 01:35:42,537 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=377, Invalid=1183, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:35:42,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-15 01:35:42,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 36. [2019-10-15 01:35:42,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 01:35:42,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-10-15 01:35:42,560 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 20 [2019-10-15 01:35:42,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:42,560 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-10-15 01:35:42,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:35:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-10-15 01:35:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:35:42,562 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:42,562 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:42,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:42,767 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:42,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:42,768 INFO L82 PathProgramCache]: Analyzing trace with hash 645148924, now seen corresponding path program 3 times [2019-10-15 01:35:42,768 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:42,769 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509724326] [2019-10-15 01:35:42,769 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:42,770 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:42,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:35:42,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509724326] [2019-10-15 01:35:42,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553352133] [2019-10-15 01:35:42,963 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:43,042 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:43,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:43,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:35:43,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:35:43,065 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:35:43,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [674261788] [2019-10-15 01:35:43,315 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:43,315 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:43,316 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:43,316 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:43,317 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:43,374 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:43,676 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:35:43,685 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:43,689 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:43,974 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:43,974 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-10-15 01:35:43,974 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412120465] [2019-10-15 01:35:43,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:35:43,975 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:43,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:35:43,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=814, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:35:43,977 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 35 states. [2019-10-15 01:35:46,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:46,037 INFO L93 Difference]: Finished difference Result 150 states and 197 transitions. [2019-10-15 01:35:46,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:35:46,038 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 32 [2019-10-15 01:35:46,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:46,041 INFO L225 Difference]: With dead ends: 150 [2019-10-15 01:35:46,041 INFO L226 Difference]: Without dead ends: 130 [2019-10-15 01:35:46,044 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1115, Invalid=2917, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:35:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-10-15 01:35:46,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 60. [2019-10-15 01:35:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-15 01:35:46,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-10-15 01:35:46,063 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 32 [2019-10-15 01:35:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:46,063 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-10-15 01:35:46,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:35:46,063 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-10-15 01:35:46,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-15 01:35:46,065 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:46,065 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:46,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:46,270 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:46,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:46,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1203167420, now seen corresponding path program 4 times [2019-10-15 01:35:46,271 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:46,271 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175391121] [2019-10-15 01:35:46,272 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,272 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:35:46,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175391121] [2019-10-15 01:35:46,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742573906] [2019-10-15 01:35:46,697 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:46,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:35:46,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:35:46,839 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:35:47,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1341442735] [2019-10-15 01:35:47,515 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:47,515 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:47,515 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:47,516 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:47,516 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:47,543 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:47,792 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2019-10-15 01:35:47,846 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:35:47,856 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:47,860 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:48,176 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:48,177 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 59 [2019-10-15 01:35:48,177 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009789981] [2019-10-15 01:35:48,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:35:48,179 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:48,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:35:48,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1300, Invalid=2122, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:35:48,183 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 59 states. [2019-10-15 01:35:52,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:52,563 INFO L93 Difference]: Finished difference Result 282 states and 377 transitions. [2019-10-15 01:35:52,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:35:52,564 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 56 [2019-10-15 01:35:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:52,567 INFO L225 Difference]: With dead ends: 282 [2019-10-15 01:35:52,568 INFO L226 Difference]: Without dead ends: 250 [2019-10-15 01:35:52,572 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2804 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3887, Invalid=8545, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:35:52,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-10-15 01:35:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 108. [2019-10-15 01:35:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-15 01:35:52,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2019-10-15 01:35:52,610 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 56 [2019-10-15 01:35:52,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:52,610 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2019-10-15 01:35:52,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:35:52,611 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2019-10-15 01:35:52,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 01:35:52,614 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:52,615 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:52,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:52,818 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:52,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:52,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1467064260, now seen corresponding path program 5 times [2019-10-15 01:35:52,820 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:52,820 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739077096] [2019-10-15 01:35:52,820 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:52,821 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:52,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:35:53,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739077096] [2019-10-15 01:35:53,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021477308] [2019-10-15 01:35:53,876 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