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_copy5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:32:36,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:32:36,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:32:36,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:32:36,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:32:36,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:32:36,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:32:36,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:32:36,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:32:36,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:32:36,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:32:36,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:32:36,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:32:36,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:32:36,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:32:36,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:32:36,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:32:36,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:32:36,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:32:36,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:32:36,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:32:36,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:32:36,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:32:36,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:32:36,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:32:36,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:32:36,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:32:36,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:32:36,602 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:32:36,620 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:32:36,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:32:36,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:32:36,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:32:36,624 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:32:36,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:32:36,625 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:32:36,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:32:36,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:32:36,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:32:36,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:32:36,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:32:36,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:32:36,627 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:32:36,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:32:36,628 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:32:36,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:32:36,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:32:36,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:32:36,628 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:32:36,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:32:36,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:32:36,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:32:36,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:32:36,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:32:36,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:32:36,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:32:36,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:32:36,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:32:36,887 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:32:36,899 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:32:36,903 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:32:36,904 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:32:36,904 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:32:36,905 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2019-10-15 01:32:36,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42c4ec599/b7afe747b0c54e7f8028d6d7e1e9bd35/FLAGd83da5c1a [2019-10-15 01:32:37,452 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:32:37,453 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2019-10-15 01:32:37,458 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42c4ec599/b7afe747b0c54e7f8028d6d7e1e9bd35/FLAGd83da5c1a [2019-10-15 01:32:37,866 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42c4ec599/b7afe747b0c54e7f8028d6d7e1e9bd35 [2019-10-15 01:32:37,876 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:32:37,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:32:37,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:32:37,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:32:37,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:32:37,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:32:37" (1/1) ... [2019-10-15 01:32:37,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78de4e90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:37, skipping insertion in model container [2019-10-15 01:32:37,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:32:37" (1/1) ... [2019-10-15 01:32:37,893 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:32:37,911 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:32:38,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:32:38,073 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:32:38,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:32:38,118 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:32:38,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:38 WrapperNode [2019-10-15 01:32:38,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:32:38,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:32:38,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:32:38,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:32:38,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:38" (1/1) ... [2019-10-15 01:32:38,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:38" (1/1) ... [2019-10-15 01:32:38,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:38" (1/1) ... [2019-10-15 01:32:38,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:38" (1/1) ... [2019-10-15 01:32:38,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:38" (1/1) ... [2019-10-15 01:32:38,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:38" (1/1) ... [2019-10-15 01:32:38,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:38" (1/1) ... [2019-10-15 01:32:38,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:32:38,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:32:38,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:32:38,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:32:38,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:32:38,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:32:38,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:32:38,309 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:32:38,309 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:32:38,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:32:38,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:32:38,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:32:38,311 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:32:38,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:32:38,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:32:38,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:32:38,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:32:38,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:32:38,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:32:38,801 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:32:38,802 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-15 01:32:38,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:32:38 BoogieIcfgContainer [2019-10-15 01:32:38,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:32:38,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:32:38,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:32:38,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:32:38,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:32:37" (1/3) ... [2019-10-15 01:32:38,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe83dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:32:38, skipping insertion in model container [2019-10-15 01:32:38,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:38" (2/3) ... [2019-10-15 01:32:38,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe83dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:32:38, skipping insertion in model container [2019-10-15 01:32:38,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:32:38" (3/3) ... [2019-10-15 01:32:38,811 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2019-10-15 01:32:38,820 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:32:38,828 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:32:38,839 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:32:38,862 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:32:38,862 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:32:38,862 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:32:38,862 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:32:38,862 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:32:38,862 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:32:38,862 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:32:38,863 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:32:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 01:32:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:32:38,883 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:38,884 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:38,886 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:38,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:38,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1854431878, now seen corresponding path program 1 times [2019-10-15 01:32:38,897 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:38,898 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839541195] [2019-10-15 01:32:38,898 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:38,898 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:38,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:32:39,070 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839541195] [2019-10-15 01:32:39,071 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:39,071 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:32:39,072 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797327663] [2019-10-15 01:32:39,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:32:39,077 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:39,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:32:39,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:39,094 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 01:32:39,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:39,132 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2019-10-15 01:32:39,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:39,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-15 01:32:39,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:39,144 INFO L225 Difference]: With dead ends: 41 [2019-10-15 01:32:39,145 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:32:39,149 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:39,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:32:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 01:32:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:32:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2019-10-15 01:32:39,193 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 16 [2019-10-15 01:32:39,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:39,194 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2019-10-15 01:32:39,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2019-10-15 01:32:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:32:39,195 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:39,195 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:39,196 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:39,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:39,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1492741861, now seen corresponding path program 1 times [2019-10-15 01:32:39,197 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:39,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558504146] [2019-10-15 01:32:39,197 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:39,198 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:39,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:32:39,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558504146] [2019-10-15 01:32:39,287 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:39,288 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:32:39,288 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431810241] [2019-10-15 01:32:39,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:32:39,290 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:39,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:32:39,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:39,291 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand 3 states. [2019-10-15 01:32:39,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:39,353 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2019-10-15 01:32:39,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:39,354 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-15 01:32:39,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:39,356 INFO L225 Difference]: With dead ends: 39 [2019-10-15 01:32:39,356 INFO L226 Difference]: Without dead ends: 26 [2019-10-15 01:32:39,358 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:39,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-15 01:32:39,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-15 01:32:39,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:32:39,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-10-15 01:32:39,371 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2019-10-15 01:32:39,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:39,371 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-10-15 01:32:39,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:39,372 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-10-15 01:32:39,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 01:32:39,374 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:39,374 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:39,375 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:39,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:39,376 INFO L82 PathProgramCache]: Analyzing trace with hash -528222000, now seen corresponding path program 1 times [2019-10-15 01:32:39,376 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:39,377 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782912168] [2019-10-15 01:32:39,378 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:39,378 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:39,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:32:39,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782912168] [2019-10-15 01:32:39,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362330800] [2019-10-15 01:32:39,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:39,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:32:39,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:32:39,614 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:32:39,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [104602252] [2019-10-15 01:32:39,699 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:32:39,699 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:39,717 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:39,725 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:39,734 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:39,925 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:41,397 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:32:41,483 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:41,507 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:41,514 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:41,861 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:41,861 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:32:41,861 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328467482] [2019-10-15 01:32:41,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:32:41,865 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:41,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:32:41,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:32:41,866 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 18 states. [2019-10-15 01:32:42,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:42,631 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2019-10-15 01:32:42,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:32:42,631 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2019-10-15 01:32:42,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:42,632 INFO L225 Difference]: With dead ends: 62 [2019-10-15 01:32:42,633 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 01:32:42,634 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-10-15 01:32:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 01:32:42,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2019-10-15 01:32:42,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-15 01:32:42,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-15 01:32:42,643 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 22 [2019-10-15 01:32:42,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:42,643 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-15 01:32:42,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:32:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-15 01:32:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-15 01:32:42,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:42,644 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:42,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:42,850 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:42,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1489745050, now seen corresponding path program 2 times [2019-10-15 01:32:42,852 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:42,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377064777] [2019-10-15 01:32:42,852 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:42,853 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:42,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:32:43,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377064777] [2019-10-15 01:32:43,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974193678] [2019-10-15 01:32:43,028 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:43,101 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:32:43,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:43,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:32:43,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:32:43,132 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:43,162 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:32:43,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [236301560] [2019-10-15 01:32:43,164 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:32:43,164 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:43,165 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:43,167 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:43,168 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:43,214 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:43,531 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:32:43,821 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:32:44,500 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:44,508 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:44,511 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:44,776 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:44,776 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 11] total 19 [2019-10-15 01:32:44,776 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83529541] [2019-10-15 01:32:44,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 01:32:44,778 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:44,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 01:32:44,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:32:44,779 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 19 states. [2019-10-15 01:32:45,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:45,517 INFO L93 Difference]: Finished difference Result 84 states and 114 transitions. [2019-10-15 01:32:45,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:32:45,517 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2019-10-15 01:32:45,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:45,519 INFO L225 Difference]: With dead ends: 84 [2019-10-15 01:32:45,519 INFO L226 Difference]: Without dead ends: 63 [2019-10-15 01:32:45,520 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:32:45,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-15 01:32:45,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2019-10-15 01:32:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-15 01:32:45,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2019-10-15 01:32:45,530 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 30 [2019-10-15 01:32:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:45,531 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2019-10-15 01:32:45,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 01:32:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2019-10-15 01:32:45,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-15 01:32:45,533 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:45,533 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:45,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:45,744 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:45,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:45,745 INFO L82 PathProgramCache]: Analyzing trace with hash 11000486, now seen corresponding path program 3 times [2019-10-15 01:32:45,745 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:45,745 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132754066] [2019-10-15 01:32:45,745 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:45,745 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:45,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-15 01:32:45,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132754066] [2019-10-15 01:32:45,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777778103] [2019-10-15 01:32:45,878 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:45,982 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:45,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:45,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:32:45,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-15 01:32:46,003 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-15 01:32:46,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [687314617] [2019-10-15 01:32:46,079 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:32:46,079 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:46,080 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:46,080 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:46,080 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:46,097 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:46,551 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:32:47,233 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:47,239 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:47,242 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:47,516 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:47,517 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-10-15 01:32:47,517 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509803564] [2019-10-15 01:32:47,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:32:47,520 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:47,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:32:47,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:32:47,521 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 23 states. [2019-10-15 01:32:48,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:48,317 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2019-10-15 01:32:48,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:32:48,318 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2019-10-15 01:32:48,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:48,320 INFO L225 Difference]: With dead ends: 113 [2019-10-15 01:32:48,320 INFO L226 Difference]: Without dead ends: 69 [2019-10-15 01:32:48,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:32:48,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-15 01:32:48,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-10-15 01:32:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-15 01:32:48,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2019-10-15 01:32:48,332 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 50 [2019-10-15 01:32:48,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:48,332 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2019-10-15 01:32:48,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:32:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2019-10-15 01:32:48,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-15 01:32:48,334 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:48,334 INFO L380 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:48,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:48,547 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:48,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:48,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1190337914, now seen corresponding path program 4 times [2019-10-15 01:32:48,548 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:48,549 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377358743] [2019-10-15 01:32:48,549 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:48,549 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:48,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-15 01:32:48,731 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377358743] [2019-10-15 01:32:48,732 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092596422] [2019-10-15 01:32:48,732 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 01:32:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:48,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:32:48,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-15 01:32:48,879 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-15 01:32:49,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [229248486] [2019-10-15 01:32:49,149 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:32:49,149 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:49,150 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:49,150 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:49,150 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:49,169 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:50,272 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:50,284 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:50,287 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:50,610 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:50,610 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-10-15 01:32:50,610 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530413730] [2019-10-15 01:32:50,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:32:50,612 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:50,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:32:50,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:32:50,613 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 35 states. [2019-10-15 01:32:51,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:51,913 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2019-10-15 01:32:51,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:32:51,913 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 56 [2019-10-15 01:32:51,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:51,915 INFO L225 Difference]: With dead ends: 125 [2019-10-15 01:32:51,915 INFO L226 Difference]: Without dead ends: 81 [2019-10-15 01:32:51,917 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=934, Invalid=3098, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:32:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-15 01:32:51,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2019-10-15 01:32:51,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-15 01:32:51,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2019-10-15 01:32:51,928 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 56 [2019-10-15 01:32:51,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:51,928 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2019-10-15 01:32:51,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:32:51,929 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2019-10-15 01:32:51,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-15 01:32:51,930 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:51,930 INFO L380 BasicCegarLoop]: trace histogram [22, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:52,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:52,136 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:52,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:52,137 INFO L82 PathProgramCache]: Analyzing trace with hash -142820794, now seen corresponding path program 5 times [2019-10-15 01:32:52,138 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:52,138 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026664609] [2019-10-15 01:32:52,138 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:52,138 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:52,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2019-10-15 01:32:52,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026664609] [2019-10-15 01:32:52,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669225549] [2019-10-15 01:32:52,353 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 01:32:53,175 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:32:53,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:53,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-15 01:32:53,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-15 01:32:53,206 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2019-10-15 01:32:53,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [260409532] [2019-10-15 01:32:53,315 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:32:53,315 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:53,315 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:53,316 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:53,316 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:53,335 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:53,950 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:32:54,366 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:54,376 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:54,378 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:54,657 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:54,657 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9, 11] total 28 [2019-10-15 01:32:54,657 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669074979] [2019-10-15 01:32:54,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-15 01:32:54,659 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:54,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-15 01:32:54,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:32:54,660 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 28 states. [2019-10-15 01:32:55,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:55,980 INFO L93 Difference]: Finished difference Result 158 states and 208 transitions. [2019-10-15 01:32:55,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-15 01:32:55,981 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 68 [2019-10-15 01:32:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:55,983 INFO L225 Difference]: With dead ends: 158 [2019-10-15 01:32:55,983 INFO L226 Difference]: Without dead ends: 121 [2019-10-15 01:32:55,984 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=520, Invalid=1832, Unknown=0, NotChecked=0, Total=2352 [2019-10-15 01:32:55,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-10-15 01:32:55,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2019-10-15 01:32:55,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-15 01:32:55,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2019-10-15 01:32:55,999 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 68 [2019-10-15 01:32:55,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:55,999 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2019-10-15 01:32:56,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-15 01:32:56,000 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2019-10-15 01:32:56,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 01:32:56,001 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:56,001 INFO L380 BasicCegarLoop]: trace histogram [22, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:56,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:56,208 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:56,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:56,208 INFO L82 PathProgramCache]: Analyzing trace with hash -866740026, now seen corresponding path program 6 times [2019-10-15 01:32:56,209 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:56,209 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25011217] [2019-10-15 01:32:56,209 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:56,210 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:56,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2019-10-15 01:32:56,651 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25011217] [2019-10-15 01:32:56,651 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121654109] [2019-10-15 01:32:56,651 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 01:32:56,870 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:56,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:56,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:32:56,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2019-10-15 01:32:56,919 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2019-10-15 01:32:57,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [625715393] [2019-10-15 01:32:57,915 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:32:57,915 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:57,916 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:57,916 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:57,916 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:57,937 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:58,438 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:32:58,844 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:32:59,285 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:59,291 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:59,293 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:59,701 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:59,701 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 59 [2019-10-15 01:32:59,701 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595501523] [2019-10-15 01:32:59,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:32:59,703 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:59,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:32:59,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:32:59,705 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand 59 states. [2019-10-15 01:33:02,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:02,525 INFO L93 Difference]: Finished difference Result 229 states and 264 transitions. [2019-10-15 01:33:02,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:33:02,525 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 108 [2019-10-15 01:33:02,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:02,527 INFO L225 Difference]: With dead ends: 229 [2019-10-15 01:33:02,527 INFO L226 Difference]: Without dead ends: 145 [2019-10-15 01:33:02,531 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2799 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3514, Invalid=8918, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:33:02,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-10-15 01:33:02,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 136. [2019-10-15 01:33:02,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-10-15 01:33:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 142 transitions. [2019-10-15 01:33:02,569 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 142 transitions. Word has length 108 [2019-10-15 01:33:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:02,569 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 142 transitions. [2019-10-15 01:33:02,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:33:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 142 transitions. [2019-10-15 01:33:02,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 01:33:02,571 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:02,572 INFO L380 BasicCegarLoop]: trace histogram [46, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:02,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:02,779 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:02,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:02,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1674581946, now seen corresponding path program 7 times [2019-10-15 01:33:02,779 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:02,779 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736682593] [2019-10-15 01:33:02,780 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:02,780 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:02,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2019-10-15 01:33:03,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736682593] [2019-10-15 01:33:03,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685815966] [2019-10-15 01:33:03,610 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:03,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 48 conjunts are in the unsatisfiable core [2019-10-15 01:33:03,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2019-10-15 01:33:05,507 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2019-10-15 01:33:09,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266565155] [2019-10-15 01:33:09,602 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:33:09,602 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:09,602 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:09,602 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:09,603 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:09,620 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:10,687 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:10,692 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:10,695 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:11,281 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:11,282 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 49, 49, 11] total 121 [2019-10-15 01:33:11,282 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801071428] [2019-10-15 01:33:11,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 121 states [2019-10-15 01:33:11,284 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:11,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2019-10-15 01:33:11,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4724, Invalid=9796, Unknown=0, NotChecked=0, Total=14520 [2019-10-15 01:33:11,289 INFO L87 Difference]: Start difference. First operand 136 states and 142 transitions. Second operand 121 states.