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/sorting_selectionsort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:31:50,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:31:50,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:31:50,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:31:50,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:31:50,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:31:50,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:31:50,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:31:50,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:31:50,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:31:50,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:31:50,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:31:50,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:31:50,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:31:50,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:31:50,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:31:50,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:31:50,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:31:50,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:31:50,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:31:50,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:31:50,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:31:50,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:31:50,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:31:50,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:31:50,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:31:50,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:31:50,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:31:50,642 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 01:31:50,667 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:31:50,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:31:50,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:31:50,670 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:31:50,670 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:31:50,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:31:50,670 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:31:50,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:31:50,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:31:50,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:31:50,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:31:50,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:31:50,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:31:50,673 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:31:50,673 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:31:50,673 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:31:50,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:31:50,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:31:50,674 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:31:50,674 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:31:50,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:31:50,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:50,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:31:50,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:31:50,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:31:50,676 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:31:50,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:31:50,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:31:50,676 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 01:31:50,971 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:31:50,983 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:31:50,987 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:31:50,988 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:31:50,988 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:31:50,989 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2019-10-15 01:31:51,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c281ddb8/5f395a1c16f7409e8fcd7f79f6f297d3/FLAGfa9fe677c [2019-10-15 01:31:51,438 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:31:51,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2019-10-15 01:31:51,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c281ddb8/5f395a1c16f7409e8fcd7f79f6f297d3/FLAGfa9fe677c [2019-10-15 01:31:51,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c281ddb8/5f395a1c16f7409e8fcd7f79f6f297d3 [2019-10-15 01:31:51,810 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:31:51,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:31:51,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:51,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:31:51,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:31:51,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:51" (1/1) ... [2019-10-15 01:31:51,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@323621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:51, skipping insertion in model container [2019-10-15 01:31:51,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:51" (1/1) ... [2019-10-15 01:31:51,827 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:31:51,844 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:31:52,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:52,017 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:31:52,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:52,152 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:31:52,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:52 WrapperNode [2019-10-15 01:31:52,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:52,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:31:52,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:31:52,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:31:52,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:52" (1/1) ... [2019-10-15 01:31:52,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:52" (1/1) ... [2019-10-15 01:31:52,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:52" (1/1) ... [2019-10-15 01:31:52,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:52" (1/1) ... [2019-10-15 01:31:52,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:52" (1/1) ... [2019-10-15 01:31:52,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:52" (1/1) ... [2019-10-15 01:31:52,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:52" (1/1) ... [2019-10-15 01:31:52,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:31:52,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:31:52,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:31:52,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:31:52,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:52" (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 01:31:52,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:31:52,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:31:52,255 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:31:52,255 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:31:52,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:31:52,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:31:52,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:31:52,256 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:31:52,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:31:52,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:31:52,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:31:52,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:31:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:31:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:31:52,760 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:31:52,761 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-15 01:31:52,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:52 BoogieIcfgContainer [2019-10-15 01:31:52,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:31:52,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:31:52,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:31:52,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:31:52,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:31:51" (1/3) ... [2019-10-15 01:31:52,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5a9fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:52, skipping insertion in model container [2019-10-15 01:31:52,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:52" (2/3) ... [2019-10-15 01:31:52,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5a9fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:52, skipping insertion in model container [2019-10-15 01:31:52,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:52" (3/3) ... [2019-10-15 01:31:52,770 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2019-10-15 01:31:52,778 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:31:52,784 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:31:52,793 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:31:52,816 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:31:52,816 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:31:52,816 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:31:52,816 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:31:52,816 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:31:52,816 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:31:52,816 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:31:52,817 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:31:52,832 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-15 01:31:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:31:52,838 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:52,839 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:52,840 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:52,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:52,844 INFO L82 PathProgramCache]: Analyzing trace with hash -702995818, now seen corresponding path program 1 times [2019-10-15 01:31:52,851 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:52,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763540179] [2019-10-15 01:31:52,852 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:52,852 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:52,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:53,004 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 01:31:53,005 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763540179] [2019-10-15 01:31:53,006 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:53,007 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:53,008 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337819294] [2019-10-15 01:31:53,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:53,014 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:53,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:53,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:53,033 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-10-15 01:31:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:53,147 INFO L93 Difference]: Finished difference Result 60 states and 92 transitions. [2019-10-15 01:31:53,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:53,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:31:53,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:53,161 INFO L225 Difference]: With dead ends: 60 [2019-10-15 01:31:53,161 INFO L226 Difference]: Without dead ends: 35 [2019-10-15 01:31:53,168 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 01:31:53,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-15 01:31:53,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2019-10-15 01:31:53,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-15 01:31:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2019-10-15 01:31:53,230 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 13 [2019-10-15 01:31:53,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:53,231 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2019-10-15 01:31:53,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:53,231 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2019-10-15 01:31:53,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:31:53,234 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:53,235 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:53,235 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:53,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:53,236 INFO L82 PathProgramCache]: Analyzing trace with hash -663003876, now seen corresponding path program 1 times [2019-10-15 01:31:53,237 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:53,237 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873508793] [2019-10-15 01:31:53,237 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:53,238 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:53,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:53,355 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 01:31:53,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873508793] [2019-10-15 01:31:53,355 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:53,356 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:31:53,356 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940943939] [2019-10-15 01:31:53,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:31:53,358 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:53,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:31:53,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:31:53,359 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 4 states. [2019-10-15 01:31:53,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:53,428 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2019-10-15 01:31:53,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:31:53,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-15 01:31:53,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:53,430 INFO L225 Difference]: With dead ends: 55 [2019-10-15 01:31:53,431 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 01:31:53,432 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:31:53,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 01:31:53,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2019-10-15 01:31:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 01:31:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2019-10-15 01:31:53,439 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 15 [2019-10-15 01:31:53,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:53,440 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2019-10-15 01:31:53,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:31:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2019-10-15 01:31:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:31:53,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:53,441 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:53,441 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:53,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:53,442 INFO L82 PathProgramCache]: Analyzing trace with hash -906594349, now seen corresponding path program 1 times [2019-10-15 01:31:53,442 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:53,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602525154] [2019-10-15 01:31:53,443 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:53,443 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:53,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:53,507 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 01:31:53,507 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602525154] [2019-10-15 01:31:53,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154817913] [2019-10-15 01:31:53,508 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 01:31:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:53,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:31:53,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:53,616 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 01:31:53,617 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:53,652 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 01:31:53,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2113789478] [2019-10-15 01:31:53,694 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:31:53,694 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:53,700 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:53,708 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:53,708 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:53,930 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:54,263 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2019-10-15 01:31:54,276 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:54,282 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:54,640 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:54,640 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4, 11] total 18 [2019-10-15 01:31:54,641 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794214225] [2019-10-15 01:31:54,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:31:54,642 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:54,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:31:54,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:31:54,644 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 18 states. [2019-10-15 01:31:55,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:55,939 INFO L93 Difference]: Finished difference Result 105 states and 160 transitions. [2019-10-15 01:31:55,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-15 01:31:55,940 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2019-10-15 01:31:55,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:55,943 INFO L225 Difference]: With dead ends: 105 [2019-10-15 01:31:55,945 INFO L226 Difference]: Without dead ends: 84 [2019-10-15 01:31:55,948 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2019-10-15 01:31:55,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-15 01:31:55,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2019-10-15 01:31:55,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-15 01:31:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 94 transitions. [2019-10-15 01:31:55,965 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 94 transitions. Word has length 16 [2019-10-15 01:31:55,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:55,966 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 94 transitions. [2019-10-15 01:31:55,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:31:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 94 transitions. [2019-10-15 01:31:55,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:31:55,967 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:55,967 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:56,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:56,180 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:56,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:56,180 INFO L82 PathProgramCache]: Analyzing trace with hash 55121478, now seen corresponding path program 2 times [2019-10-15 01:31:56,181 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:56,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289694594] [2019-10-15 01:31:56,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:56,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:56,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:31:56,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289694594] [2019-10-15 01:31:56,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412558705] [2019-10-15 01:31:56,249 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 01:31:56,303 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:31:56,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:56,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:31:56,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:31:56,323 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:31:56,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1833891325] [2019-10-15 01:31:56,358 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:31:56,358 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:56,358 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:56,359 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:56,359 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:56,394 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:56,659 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2019-10-15 01:31:56,690 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:56,696 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:57,117 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:57,118 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 11] total 21 [2019-10-15 01:31:57,118 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316132174] [2019-10-15 01:31:57,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-15 01:31:57,119 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:57,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-15 01:31:57,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:31:57,120 INFO L87 Difference]: Start difference. First operand 66 states and 94 transitions. Second operand 21 states. [2019-10-15 01:31:58,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:58,471 INFO L93 Difference]: Finished difference Result 144 states and 214 transitions. [2019-10-15 01:31:58,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-15 01:31:58,472 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2019-10-15 01:31:58,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:58,474 INFO L225 Difference]: With dead ends: 144 [2019-10-15 01:31:58,474 INFO L226 Difference]: Without dead ends: 92 [2019-10-15 01:31:58,476 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=313, Invalid=1493, Unknown=0, NotChecked=0, Total=1806 [2019-10-15 01:31:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-15 01:31:58,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2019-10-15 01:31:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-15 01:31:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 102 transitions. [2019-10-15 01:31:58,492 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 102 transitions. Word has length 20 [2019-10-15 01:31:58,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:58,493 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 102 transitions. [2019-10-15 01:31:58,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-15 01:31:58,493 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 102 transitions. [2019-10-15 01:31:58,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:31:58,494 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:58,494 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:58,697 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:58,697 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:58,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:58,698 INFO L82 PathProgramCache]: Analyzing trace with hash 425780998, now seen corresponding path program 3 times [2019-10-15 01:31:58,698 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:58,698 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888300458] [2019-10-15 01:31:58,698 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:58,698 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:58,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:31:58,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888300458] [2019-10-15 01:31:58,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196299056] [2019-10-15 01:31:58,819 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 01:31:58,889 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:31:58,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:58,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:31:58,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:31:58,956 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:31:59,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [488518717] [2019-10-15 01:31:59,041 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:31:59,041 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:59,041 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:59,041 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:59,042 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:59,072 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:59,265 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2019-10-15 01:31:59,280 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:59,283 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:59,704 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:59,704 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7, 11] total 29 [2019-10-15 01:31:59,705 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972592760] [2019-10-15 01:31:59,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-15 01:31:59,706 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:59,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-15 01:31:59,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2019-10-15 01:31:59,710 INFO L87 Difference]: Start difference. First operand 74 states and 102 transitions. Second operand 29 states. [2019-10-15 01:32:03,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:03,220 INFO L93 Difference]: Finished difference Result 259 states and 401 transitions. [2019-10-15 01:32:03,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-10-15 01:32:03,221 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 24 [2019-10-15 01:32:03,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:03,226 INFO L225 Difference]: With dead ends: 259 [2019-10-15 01:32:03,226 INFO L226 Difference]: Without dead ends: 195 [2019-10-15 01:32:03,230 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1412, Invalid=5068, Unknown=0, NotChecked=0, Total=6480 [2019-10-15 01:32:03,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-10-15 01:32:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 159. [2019-10-15 01:32:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-10-15 01:32:03,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 229 transitions. [2019-10-15 01:32:03,259 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 229 transitions. Word has length 24 [2019-10-15 01:32:03,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:03,259 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 229 transitions. [2019-10-15 01:32:03,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-15 01:32:03,260 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 229 transitions. [2019-10-15 01:32:03,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-15 01:32:03,260 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:03,261 INFO L380 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:03,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:03,475 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:03,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:03,475 INFO L82 PathProgramCache]: Analyzing trace with hash 2121322217, now seen corresponding path program 4 times [2019-10-15 01:32:03,476 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:03,476 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553443852] [2019-10-15 01:32:03,477 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:03,477 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:03,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:32:03,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553443852] [2019-10-15 01:32:03,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155146047] [2019-10-15 01:32:03,623 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:03,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:32:03,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-15 01:32:03,824 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-15 01:32:04,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085513070] [2019-10-15 01:32:04,062 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:32:04,062 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:04,062 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:04,063 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:04,063 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:04,087 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:04,225 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2019-10-15 01:32:04,232 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:04,236 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:04,601 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:04,601 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13, 11] total 42 [2019-10-15 01:32:04,601 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842276134] [2019-10-15 01:32:04,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-15 01:32:04,602 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:04,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-15 01:32:04,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2019-10-15 01:32:04,603 INFO L87 Difference]: Start difference. First operand 159 states and 229 transitions. Second operand 42 states. [2019-10-15 01:32:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:10,668 INFO L93 Difference]: Finished difference Result 526 states and 825 transitions. [2019-10-15 01:32:10,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-10-15 01:32:10,670 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 31 [2019-10-15 01:32:10,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:10,673 INFO L225 Difference]: With dead ends: 526 [2019-10-15 01:32:10,673 INFO L226 Difference]: Without dead ends: 383 [2019-10-15 01:32:10,679 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4605 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4117, Invalid=12395, Unknown=0, NotChecked=0, Total=16512 [2019-10-15 01:32:10,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2019-10-15 01:32:10,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 311. [2019-10-15 01:32:10,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2019-10-15 01:32:10,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 465 transitions. [2019-10-15 01:32:10,724 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 465 transitions. Word has length 31 [2019-10-15 01:32:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:10,725 INFO L462 AbstractCegarLoop]: Abstraction has 311 states and 465 transitions. [2019-10-15 01:32:10,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-15 01:32:10,725 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 465 transitions. [2019-10-15 01:32:10,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:32:10,726 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:10,726 INFO L380 BasicCegarLoop]: trace histogram [22, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:10,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:10,931 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:10,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:10,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1568778202, now seen corresponding path program 5 times [2019-10-15 01:32:10,932 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:10,932 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454083678] [2019-10-15 01:32:10,933 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:10,933 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:10,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:32:11,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454083678] [2019-10-15 01:32:11,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287744236] [2019-10-15 01:32:11,079 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 01:32:11,197 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-15 01:32:11,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:11,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:32:11,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:32:11,225 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:32:11,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1110450595] [2019-10-15 01:32:11,358 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:32:11,358 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:11,358 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:11,359 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:11,359 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:11,375 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:11,498 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2019-10-15 01:32:11,504 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:11,507 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:11,832 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:11,833 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 11] total 33 [2019-10-15 01:32:11,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083039564] [2019-10-15 01:32:11,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-15 01:32:11,835 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:11,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-15 01:32:11,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 01:32:11,836 INFO L87 Difference]: Start difference. First operand 311 states and 465 transitions. Second operand 33 states. [2019-10-15 01:32:17,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:17,853 INFO L93 Difference]: Finished difference Result 668 states and 1030 transitions. [2019-10-15 01:32:17,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-15 01:32:17,853 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 44 [2019-10-15 01:32:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:17,857 INFO L225 Difference]: With dead ends: 668 [2019-10-15 01:32:17,857 INFO L226 Difference]: Without dead ends: 395 [2019-10-15 01:32:17,860 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1112, Invalid=4142, Unknown=2, NotChecked=0, Total=5256 [2019-10-15 01:32:17,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2019-10-15 01:32:17,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 323. [2019-10-15 01:32:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2019-10-15 01:32:17,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 477 transitions. [2019-10-15 01:32:17,898 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 477 transitions. Word has length 44 [2019-10-15 01:32:17,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:17,899 INFO L462 AbstractCegarLoop]: Abstraction has 323 states and 477 transitions. [2019-10-15 01:32:17,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-15 01:32:17,899 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 477 transitions. [2019-10-15 01:32:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-15 01:32:17,900 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:17,901 INFO L380 BasicCegarLoop]: trace histogram [22, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:18,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:18,108 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:18,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2052712954, now seen corresponding path program 6 times [2019-10-15 01:32:18,109 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:18,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983606379] [2019-10-15 01:32:18,109 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:18,109 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:18,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:32:18,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983606379] [2019-10-15 01:32:18,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431591086] [2019-10-15 01:32:18,481 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 01:32:18,638 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:18,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:18,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:32:18,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-10-15 01:32:19,124 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-10-15 01:32:19,973 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2072302223] [2019-10-15 01:32:19,974 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:32:19,975 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:19,975 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:19,975 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:19,976 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:20,009 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:20,138 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2019-10-15 01:32:20,144 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:20,150 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:20,678 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:20,679 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 25, 11] total 77 [2019-10-15 01:32:20,679 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588313884] [2019-10-15 01:32:20,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-10-15 01:32:20,680 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:20,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-10-15 01:32:20,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1455, Invalid=4397, Unknown=0, NotChecked=0, Total=5852 [2019-10-15 01:32:20,684 INFO L87 Difference]: Start difference. First operand 323 states and 477 transitions. Second operand 77 states.