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_09.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:35:45,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:35:45,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:35:45,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:35:45,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:35:45,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:35:45,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:35:45,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:35:45,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:35:45,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:35:45,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:35:45,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:35:45,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:35:45,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:35:45,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:35:45,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:35:45,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:35:45,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:35:45,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:35:45,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:35:45,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:35:45,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:35:45,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:35:45,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:35:45,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:35:45,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:35:45,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:35:45,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:35:45,482 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 01:35:45,507 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:35:45,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:35:45,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:35:45,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:35:45,509 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:35:45,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:35:45,510 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:35:45,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:35:45,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:35:45,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:35:45,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:35:45,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:35:45,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:35:45,516 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:35:45,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:35:45,516 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:35:45,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:35:45,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:35:45,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:35:45,517 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:35:45,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:35:45,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:35:45,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:35:45,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:35:45,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:35:45,518 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:35:45,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:35:45,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:35:45,519 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 01:35:45,800 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:35:45,813 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:35:45,816 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:35:45,817 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:35:45,818 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:35:45,819 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_09.i [2019-10-15 01:35:45,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9ec45553/849b59953b3348f78da67f17d36f33c8/FLAG93cebbf32 [2019-10-15 01:35:46,346 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:35:46,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_09.i [2019-10-15 01:35:46,351 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9ec45553/849b59953b3348f78da67f17d36f33c8/FLAG93cebbf32 [2019-10-15 01:35:46,723 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9ec45553/849b59953b3348f78da67f17d36f33c8 [2019-10-15 01:35:46,736 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:35:46,738 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:35:46,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:46,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:35:46,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:35:46,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:46" (1/1) ... [2019-10-15 01:35:46,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b7235f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:46, skipping insertion in model container [2019-10-15 01:35:46,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:46" (1/1) ... [2019-10-15 01:35:46,756 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:35:46,775 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:35:46,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:46,944 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:35:46,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:46,984 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:35:46,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:46 WrapperNode [2019-10-15 01:35:46,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:46,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:35:46,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:35:46,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:35:47,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:46" (1/1) ... [2019-10-15 01:35:47,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:46" (1/1) ... [2019-10-15 01:35:47,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:46" (1/1) ... [2019-10-15 01:35:47,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:46" (1/1) ... [2019-10-15 01:35:47,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:46" (1/1) ... [2019-10-15 01:35:47,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:46" (1/1) ... [2019-10-15 01:35:47,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:46" (1/1) ... [2019-10-15 01:35:47,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:35:47,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:35:47,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:35:47,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:35:47,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:46" (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 01:35:47,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:35:47,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:35:47,178 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:35:47,178 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:35:47,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:35:47,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:35:47,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:35:47,179 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:35:47,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:35:47,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:35:47,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:35:47,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:35:47,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:35:47,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:35:47,517 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:35:47,517 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:35:47,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:47 BoogieIcfgContainer [2019-10-15 01:35:47,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:35:47,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:35:47,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:35:47,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:35:47,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:35:46" (1/3) ... [2019-10-15 01:35:47,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f28b74d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:47, skipping insertion in model container [2019-10-15 01:35:47,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:46" (2/3) ... [2019-10-15 01:35:47,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f28b74d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:47, skipping insertion in model container [2019-10-15 01:35:47,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:47" (3/3) ... [2019-10-15 01:35:47,528 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_09.i [2019-10-15 01:35:47,539 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:35:47,546 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:35:47,557 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:35:47,581 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:35:47,581 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:35:47,581 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:35:47,581 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:35:47,581 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:35:47,582 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:35:47,582 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:35:47,582 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:35:47,596 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:35:47,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:35:47,602 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:47,603 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:47,605 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:47,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:47,610 INFO L82 PathProgramCache]: Analyzing trace with hash 328370140, now seen corresponding path program 1 times [2019-10-15 01:35:47,617 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:47,617 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419845091] [2019-10-15 01:35:47,617 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:47,618 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:47,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:47,802 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 01:35:47,803 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419845091] [2019-10-15 01:35:47,804 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:47,804 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:47,804 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156107489] [2019-10-15 01:35:47,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:47,809 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:47,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:47,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:47,822 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-15 01:35:47,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:47,869 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-10-15 01:35:47,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:47,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:35:47,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:47,880 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:35:47,880 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:35:47,886 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 01:35:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:35:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:35:47,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:35:47,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-15 01:35:47,941 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2019-10-15 01:35:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:47,942 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-15 01:35:47,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-15 01:35:47,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:35:47,944 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:47,944 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:47,945 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:47,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:47,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1896737256, now seen corresponding path program 1 times [2019-10-15 01:35:47,947 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:47,947 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140276325] [2019-10-15 01:35:47,947 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:47,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:47,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:35:48,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140276325] [2019-10-15 01:35:48,041 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:48,041 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:48,041 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775618983] [2019-10-15 01:35:48,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:48,043 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:48,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:48,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:48,044 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2019-10-15 01:35:48,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:48,069 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-15 01:35:48,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:48,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:35:48,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:48,072 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:35:48,072 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:35:48,074 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 01:35:48,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:35:48,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-10-15 01:35:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:35:48,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-15 01:35:48,084 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-10-15 01:35:48,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:48,084 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-15 01:35:48,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-15 01:35:48,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:35:48,085 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:48,086 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:48,086 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:48,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:48,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1718311367, now seen corresponding path program 1 times [2019-10-15 01:35:48,087 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:48,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110384737] [2019-10-15 01:35:48,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:48,088 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:48,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:48,155 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 01:35:48,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110384737] [2019-10-15 01:35:48,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884181499] [2019-10-15 01:35:48,156 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 01:35:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:48,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:35:48,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:48,283 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 01:35:48,284 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:48,335 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 01:35:48,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1172199677] [2019-10-15 01:35:48,373 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:48,373 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:48,380 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:48,388 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:48,397 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:48,588 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:48,956 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2019-10-15 01:35:49,111 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:49,131 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:49,140 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:49,455 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:49,455 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:35:49,456 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115982437] [2019-10-15 01:35:49,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:35:49,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:49,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:35:49,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:35:49,460 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 18 states. [2019-10-15 01:35:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:50,238 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2019-10-15 01:35:50,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:35:50,238 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-10-15 01:35:50,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:50,240 INFO L225 Difference]: With dead ends: 50 [2019-10-15 01:35:50,240 INFO L226 Difference]: Without dead ends: 39 [2019-10-15 01:35:50,243 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 01:35:50,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-15 01:35:50,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2019-10-15 01:35:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:35:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-15 01:35:50,251 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-10-15 01:35:50,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:50,251 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-15 01:35:50,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:35:50,252 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-15 01:35:50,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:35:50,252 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:50,253 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:50,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:50,456 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:50,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:50,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1363999975, now seen corresponding path program 2 times [2019-10-15 01:35:50,458 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:50,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133342409] [2019-10-15 01:35:50,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:50,459 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:50,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:50,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133342409] [2019-10-15 01:35:50,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952129959] [2019-10-15 01:35:50,580 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 01:35:50,636 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:35:50,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:50,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:35:50,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:50,668 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:50,707 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1308932910] [2019-10-15 01:35:50,708 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:50,708 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:50,709 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:50,709 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:50,709 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:50,769 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:51,107 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:51,119 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:51,126 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:51,412 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:51,412 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 11] total 21 [2019-10-15 01:35:51,413 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101710107] [2019-10-15 01:35:51,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-15 01:35:51,414 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:51,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-15 01:35:51,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:35:51,415 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 21 states. [2019-10-15 01:35:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:52,388 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2019-10-15 01:35:52,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 01:35:52,388 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2019-10-15 01:35:52,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:52,390 INFO L225 Difference]: With dead ends: 73 [2019-10-15 01:35:52,390 INFO L226 Difference]: Without dead ends: 60 [2019-10-15 01:35:52,392 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=436, Invalid=1456, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:35:52,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-15 01:35:52,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 32. [2019-10-15 01:35:52,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:35:52,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-15 01:35:52,411 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2019-10-15 01:35:52,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:52,411 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-15 01:35:52,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-15 01:35:52,411 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-15 01:35:52,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:35:52,414 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:52,414 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:52,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:52,619 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:52,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:52,620 INFO L82 PathProgramCache]: Analyzing trace with hash 311824988, now seen corresponding path program 3 times [2019-10-15 01:35:52,620 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:52,621 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247124573] [2019-10-15 01:35:52,621 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:52,621 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:52,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:35:52,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247124573] [2019-10-15 01:35:52,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670356309] [2019-10-15 01:35:52,821 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 01:35:52,922 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:52,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:52,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-15 01:35:52,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:35:53,039 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:35:53,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [567576373] [2019-10-15 01:35:53,183 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:53,183 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:53,183 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:53,184 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:53,184 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:53,215 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:53,545 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:53,558 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:53,563 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:53,860 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:53,860 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 39 [2019-10-15 01:35:53,861 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477651135] [2019-10-15 01:35:53,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-15 01:35:53,862 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:53,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-15 01:35:53,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=995, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:35:53,863 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 39 states. [2019-10-15 01:35:55,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:55,868 INFO L93 Difference]: Finished difference Result 106 states and 138 transitions. [2019-10-15 01:35:55,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-15 01:35:55,869 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 28 [2019-10-15 01:35:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:55,871 INFO L225 Difference]: With dead ends: 106 [2019-10-15 01:35:55,872 INFO L226 Difference]: Without dead ends: 88 [2019-10-15 01:35:55,875 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1816, Invalid=4990, Unknown=0, NotChecked=0, Total=6806 [2019-10-15 01:35:55,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-15 01:35:55,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 52. [2019-10-15 01:35:55,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-15 01:35:55,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2019-10-15 01:35:55,889 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 28 [2019-10-15 01:35:55,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:55,889 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2019-10-15 01:35:55,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-15 01:35:55,890 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2019-10-15 01:35:55,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-15 01:35:55,891 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:55,891 INFO L380 BasicCegarLoop]: trace histogram [26, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:56,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:56,096 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:56,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:56,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1833583364, now seen corresponding path program 4 times [2019-10-15 01:35:56,097 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:56,097 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085030674] [2019-10-15 01:35:56,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:56,098 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:56,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-15 01:35:56,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085030674] [2019-10-15 01:35:56,301 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951178667] [2019-10-15 01:35:56,301 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 01:35:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:56,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-15 01:35:56,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:35:56,642 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:35:57,230 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [147099303] [2019-10-15 01:35:57,231 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:57,231 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:57,231 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:57,232 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:57,232 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:57,257 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:57,562 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:57,574 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:57,580 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:57,942 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:57,942 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 29, 29, 11] total 75 [2019-10-15 01:35:57,942 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996203014] [2019-10-15 01:35:57,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-10-15 01:35:57,945 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:57,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-10-15 01:35:57,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2233, Invalid=3317, Unknown=0, NotChecked=0, Total=5550 [2019-10-15 01:35:57,949 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 75 states. [2019-10-15 01:36:02,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:02,557 INFO L93 Difference]: Finished difference Result 160 states and 216 transitions. [2019-10-15 01:36:02,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-10-15 01:36:02,558 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 48 [2019-10-15 01:36:02,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:02,561 INFO L225 Difference]: With dead ends: 160 [2019-10-15 01:36:02,561 INFO L226 Difference]: Without dead ends: 140 [2019-10-15 01:36:02,567 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9132 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7700, Invalid=17422, Unknown=0, NotChecked=0, Total=25122 [2019-10-15 01:36:02,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-10-15 01:36:02,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 92. [2019-10-15 01:36:02,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-15 01:36:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2019-10-15 01:36:02,585 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 48 [2019-10-15 01:36:02,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:02,585 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2019-10-15 01:36:02,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-10-15 01:36:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2019-10-15 01:36:02,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-15 01:36:02,588 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:02,589 INFO L380 BasicCegarLoop]: trace histogram [62, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:02,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:02,793 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:02,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:02,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1450531388, now seen corresponding path program 5 times [2019-10-15 01:36:02,795 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:02,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744951694] [2019-10-15 01:36:02,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:02,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:02,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:03,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2058 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2019-10-15 01:36:03,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744951694] [2019-10-15 01:36:03,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884268951] [2019-10-15 01:36:03,076 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:08,210 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-15 01:36:08,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:08,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-15 01:36:08,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2058 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2019-10-15 01:36:08,240 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2058 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2019-10-15 01:36:08,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [630554930] [2019-10-15 01:36:08,572 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:36:08,572 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:08,573 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:08,573 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:08,573 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:08,597 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:08,882 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:36:08,888 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:08,891 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:09,192 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:09,192 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 11] total 43 [2019-10-15 01:36:09,193 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620738955] [2019-10-15 01:36:09,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-15 01:36:09,194 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:09,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-15 01:36:09,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=1186, Unknown=0, NotChecked=0, Total=1806 [2019-10-15 01:36:09,196 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 43 states. [2019-10-15 01:36:12,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:12,617 INFO L93 Difference]: Finished difference Result 211 states and 257 transitions. [2019-10-15 01:36:12,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-10-15 01:36:12,617 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 88 [2019-10-15 01:36:12,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:12,620 INFO L225 Difference]: With dead ends: 211 [2019-10-15 01:36:12,620 INFO L226 Difference]: Without dead ends: 202 [2019-10-15 01:36:12,624 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3295 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3362, Invalid=8628, Unknown=0, NotChecked=0, Total=11990 [2019-10-15 01:36:12,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-10-15 01:36:12,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 108. [2019-10-15 01:36:12,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-15 01:36:12,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2019-10-15 01:36:12,650 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 88 [2019-10-15 01:36:12,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:12,651 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2019-10-15 01:36:12,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-15 01:36:12,651 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2019-10-15 01:36:12,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 01:36:12,655 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:12,655 INFO L380 BasicCegarLoop]: trace histogram [62, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:12,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:12,856 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:12,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1109762876, now seen corresponding path program 6 times [2019-10-15 01:36:12,857 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:12,857 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238066243] [2019-10-15 01:36:12,857 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:12,857 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:12,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2019-10-15 01:36:13,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238066243] [2019-10-15 01:36:13,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39241362] [2019-10-15 01:36:13,537 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:13,700 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:36:13,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:13,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 64 conjunts are in the unsatisfiable core [2019-10-15 01:36:13,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-10-15 01:36:14,230 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-10-15 01:36:17,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1765625818] [2019-10-15 01:36:17,233 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:36:17,233 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:17,233 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:17,234 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:17,234 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:17,256 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:17,518 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:36:17,526 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:17,530 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:17,889 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:17,890 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 65, 65, 11] total 163 [2019-10-15 01:36:17,890 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172703780] [2019-10-15 01:36:17,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 163 states [2019-10-15 01:36:17,892 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:17,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2019-10-15 01:36:17,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11957, Invalid=14449, Unknown=0, NotChecked=0, Total=26406 [2019-10-15 01:36:17,897 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 163 states.