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_copy4_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:32:32,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:32:32,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:32:32,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:32:32,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:32:32,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:32:32,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:32:32,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:32:32,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:32:32,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:32:32,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:32:32,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:32:32,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:32:32,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:32:32,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:32:32,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:32:32,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:32:32,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:32:32,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:32:32,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:32:32,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:32:32,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:32:32,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:32:32,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:32:32,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:32:32,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:32:32,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:32:32,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:32:32,820 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 01:32:32,834 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:32:32,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:32:32,836 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:32:32,836 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:32:32,836 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:32:32,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:32:32,837 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:32:32,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:32:32,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:32:32,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:32:32,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:32:32,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:32:32,838 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:32:32,838 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:32:32,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:32:32,839 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:32:32,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:32:32,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:32:32,839 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:32:32,839 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:32:32,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:32:32,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:32:32,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:32:32,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:32:32,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:32:32,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:32:32,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:32:32,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:32:32,841 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 01:32:33,118 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:32:33,131 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:32:33,135 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:32:33,137 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:32:33,137 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:32:33,138 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-1.i [2019-10-15 01:32:33,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63b393097/907768dc2650476dafe5f6f43ba20d59/FLAGc09471354 [2019-10-15 01:32:33,636 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:32:33,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy4_ground-1.i [2019-10-15 01:32:33,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63b393097/907768dc2650476dafe5f6f43ba20d59/FLAGc09471354 [2019-10-15 01:32:34,052 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63b393097/907768dc2650476dafe5f6f43ba20d59 [2019-10-15 01:32:34,063 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:32:34,065 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:32:34,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:32:34,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:32:34,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:32:34,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:32:34" (1/1) ... [2019-10-15 01:32:34,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4af936d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:34, skipping insertion in model container [2019-10-15 01:32:34,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:32:34" (1/1) ... [2019-10-15 01:32:34,083 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:32:34,108 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:32:34,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:32:34,338 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:32:34,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:32:34,402 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:32:34,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:34 WrapperNode [2019-10-15 01:32:34,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:32:34,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:32:34,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:32:34,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:32:34,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:34" (1/1) ... [2019-10-15 01:32:34,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:34" (1/1) ... [2019-10-15 01:32:34,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:34" (1/1) ... [2019-10-15 01:32:34,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:34" (1/1) ... [2019-10-15 01:32:34,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:34" (1/1) ... [2019-10-15 01:32:34,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:34" (1/1) ... [2019-10-15 01:32:34,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:34" (1/1) ... [2019-10-15 01:32:34,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:32:34,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:32:34,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:32:34,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:32:34,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:34" (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 01:32:34,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:32:34,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:32:34,613 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:32:34,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:32:34,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:32:34,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:32:34,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:32:34,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:32:34,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:32:34,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:32:34,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:32:34,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:32:34,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:32:34,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:32:35,112 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:32:35,112 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-15 01:32:35,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:32:35 BoogieIcfgContainer [2019-10-15 01:32:35,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:32:35,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:32:35,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:32:35,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:32:35,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:32:34" (1/3) ... [2019-10-15 01:32:35,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eee6d9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:32:35, skipping insertion in model container [2019-10-15 01:32:35,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:34" (2/3) ... [2019-10-15 01:32:35,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eee6d9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:32:35, skipping insertion in model container [2019-10-15 01:32:35,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:32:35" (3/3) ... [2019-10-15 01:32:35,123 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-1.i [2019-10-15 01:32:35,136 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:32:35,147 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:32:35,160 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:32:35,198 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:32:35,198 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:32:35,198 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:32:35,199 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:32:35,199 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:32:35,199 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:32:35,199 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:32:35,199 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:32:35,220 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-15 01:32:35,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:32:35,228 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:35,229 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:35,231 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:35,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:35,237 INFO L82 PathProgramCache]: Analyzing trace with hash -215443945, now seen corresponding path program 1 times [2019-10-15 01:32:35,247 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:35,248 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355953732] [2019-10-15 01:32:35,248 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:35,248 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:35,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:35,433 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 01:32:35,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355953732] [2019-10-15 01:32:35,438 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:35,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:32:35,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699253860] [2019-10-15 01:32:35,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:32:35,444 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:35,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:32:35,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:35,464 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-10-15 01:32:35,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:35,502 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2019-10-15 01:32:35,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:35,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-15 01:32:35,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:35,514 INFO L225 Difference]: With dead ends: 39 [2019-10-15 01:32:35,514 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:32:35,520 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 01:32:35,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:32:35,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:32:35,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:32:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2019-10-15 01:32:35,572 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 15 [2019-10-15 01:32:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:35,573 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2019-10-15 01:32:35,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2019-10-15 01:32:35,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:32:35,575 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:35,576 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:35,576 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:35,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:35,578 INFO L82 PathProgramCache]: Analyzing trace with hash 251755986, now seen corresponding path program 1 times [2019-10-15 01:32:35,578 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:35,578 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930411839] [2019-10-15 01:32:35,578 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:35,579 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:35,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:35,663 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 01:32:35,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930411839] [2019-10-15 01:32:35,664 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:35,664 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:32:35,664 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300281503] [2019-10-15 01:32:35,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:32:35,666 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:35,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:32:35,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:35,667 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 3 states. [2019-10-15 01:32:35,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:35,701 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2019-10-15 01:32:35,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:35,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-15 01:32:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:35,703 INFO L225 Difference]: With dead ends: 36 [2019-10-15 01:32:35,703 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 01:32:35,704 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 01:32:35,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 01:32:35,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-15 01:32:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:32:35,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-10-15 01:32:35,712 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2019-10-15 01:32:35,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:35,712 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-10-15 01:32:35,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:35,713 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-10-15 01:32:35,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:32:35,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:35,714 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] [2019-10-15 01:32:35,714 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:35,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:35,715 INFO L82 PathProgramCache]: Analyzing trace with hash -173046538, now seen corresponding path program 1 times [2019-10-15 01:32:35,715 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:35,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678410325] [2019-10-15 01:32:35,715 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:35,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:35,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:32:35,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678410325] [2019-10-15 01:32:35,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191927231] [2019-10-15 01:32:35,814 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 01:32:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:35,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:32:35,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:32:35,953 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:32:36,005 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1124350268] [2019-10-15 01:32:36,028 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:32:36,028 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:36,035 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:36,048 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:36,049 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:36,211 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:37,464 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:32:37,562 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:37,587 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:37,605 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:38,008 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:38,008 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:32:38,008 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298940867] [2019-10-15 01:32:38,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:32:38,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:38,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:32:38,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:32:38,013 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 18 states. [2019-10-15 01:32:38,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:38,792 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2019-10-15 01:32:38,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:32:38,795 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 20 [2019-10-15 01:32:38,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:38,796 INFO L225 Difference]: With dead ends: 57 [2019-10-15 01:32:38,796 INFO L226 Difference]: Without dead ends: 40 [2019-10-15 01:32:38,799 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-10-15 01:32:38,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-15 01:32:38,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2019-10-15 01:32:38,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-15 01:32:38,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-10-15 01:32:38,814 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2019-10-15 01:32:38,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:38,814 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-10-15 01:32:38,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:32:38,814 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-10-15 01:32:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 01:32:38,815 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:38,815 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:39,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:39,019 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:39,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:39,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1320114153, now seen corresponding path program 2 times [2019-10-15 01:32:39,019 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:39,019 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078228418] [2019-10-15 01:32:39,020 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:39,020 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:39,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:32:39,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078228418] [2019-10-15 01:32:39,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395118731] [2019-10-15 01:32:39,124 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 01:32:39,183 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:32:39,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:39,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:32:39,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:32:39,210 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-15 01:32:39,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [182920583] [2019-10-15 01:32:39,255 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:32:39,255 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:39,256 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:39,256 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:39,256 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:39,289 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:39,631 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:32:40,349 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:40,358 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:40,362 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:40,662 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:40,662 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 11] total 23 [2019-10-15 01:32:40,663 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217714814] [2019-10-15 01:32:40,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:32:40,664 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:40,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:32:40,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:32:40,667 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 23 states. [2019-10-15 01:32:41,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:41,546 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2019-10-15 01:32:41,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-15 01:32:41,549 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2019-10-15 01:32:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:41,550 INFO L225 Difference]: With dead ends: 78 [2019-10-15 01:32:41,550 INFO L226 Difference]: Without dead ends: 57 [2019-10-15 01:32:41,551 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2019-10-15 01:32:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-15 01:32:41,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2019-10-15 01:32:41,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-15 01:32:41,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2019-10-15 01:32:41,562 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 27 [2019-10-15 01:32:41,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:41,562 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2019-10-15 01:32:41,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:32:41,563 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2019-10-15 01:32:41,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:32:41,564 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:41,564 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:41,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:41,768 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:41,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:41,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1984188370, now seen corresponding path program 3 times [2019-10-15 01:32:41,770 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:41,770 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380094594] [2019-10-15 01:32:41,770 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:41,770 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:41,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:32:41,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380094594] [2019-10-15 01:32:41,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774084910] [2019-10-15 01:32:41,934 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 01:32:42,045 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:42,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:42,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:32:42,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-15 01:32:42,121 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-15 01:32:42,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1318294647] [2019-10-15 01:32:42,242 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:32:42,242 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:42,242 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:42,243 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:42,243 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:42,278 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:43,125 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:43,132 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:43,136 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:43,547 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:43,547 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 11] total 31 [2019-10-15 01:32:43,548 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80386804] [2019-10-15 01:32:43,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-15 01:32:43,552 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:43,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-15 01:32:43,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2019-10-15 01:32:43,553 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 31 states. [2019-10-15 01:32:44,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:44,765 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2019-10-15 01:32:44,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-15 01:32:44,766 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2019-10-15 01:32:44,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:44,767 INFO L225 Difference]: With dead ends: 105 [2019-10-15 01:32:44,767 INFO L226 Difference]: Without dead ends: 68 [2019-10-15 01:32:44,769 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=473, Invalid=2719, Unknown=0, NotChecked=0, Total=3192 [2019-10-15 01:32:44,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-15 01:32:44,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2019-10-15 01:32:44,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-15 01:32:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2019-10-15 01:32:44,780 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 44 [2019-10-15 01:32:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:44,780 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2019-10-15 01:32:44,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-15 01:32:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2019-10-15 01:32:44,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-15 01:32:44,782 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:44,782 INFO L380 BasicCegarLoop]: trace histogram [12, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:44,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:44,994 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:44,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:44,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1778924741, now seen corresponding path program 4 times [2019-10-15 01:32:44,995 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:44,996 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449197678] [2019-10-15 01:32:44,996 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:44,996 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:44,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-10-15 01:32:45,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449197678] [2019-10-15 01:32:45,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903928145] [2019-10-15 01:32:45,197 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 01:32:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:45,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:32:45,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:32:45,455 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 01:32:45,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1236649817] [2019-10-15 01:32:45,757 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:32:45,757 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:45,757 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:45,757 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:45,758 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:45,781 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:46,631 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:46,637 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:46,639 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:47,022 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:47,022 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15, 11] total 46 [2019-10-15 01:32:47,022 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080701103] [2019-10-15 01:32:47,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-10-15 01:32:47,024 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:47,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-10-15 01:32:47,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1619, Unknown=0, NotChecked=0, Total=2070 [2019-10-15 01:32:47,026 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 46 states. [2019-10-15 01:32:48,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:48,943 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2019-10-15 01:32:48,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-10-15 01:32:48,944 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 55 [2019-10-15 01:32:48,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:48,945 INFO L225 Difference]: With dead ends: 127 [2019-10-15 01:32:48,945 INFO L226 Difference]: Without dead ends: 86 [2019-10-15 01:32:48,948 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1363, Invalid=6119, Unknown=0, NotChecked=0, Total=7482 [2019-10-15 01:32:48,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-15 01:32:48,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2019-10-15 01:32:48,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-15 01:32:48,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2019-10-15 01:32:48,969 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 55 [2019-10-15 01:32:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:48,970 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2019-10-15 01:32:48,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-10-15 01:32:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2019-10-15 01:32:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-15 01:32:48,971 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:48,971 INFO L380 BasicCegarLoop]: trace histogram [26, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:49,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:49,175 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:49,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:49,176 INFO L82 PathProgramCache]: Analyzing trace with hash -558595337, now seen corresponding path program 5 times [2019-10-15 01:32:49,176 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:49,176 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024005685] [2019-10-15 01:32:49,177 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:49,177 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:49,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-10-15 01:32:49,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024005685] [2019-10-15 01:32:49,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837959376] [2019-10-15 01:32:49,341 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 01:32:50,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-15 01:32:50,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:50,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-15 01:32:50,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-10-15 01:32:50,964 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-10-15 01:32:51,113 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1781518944] [2019-10-15 01:32:51,114 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:32:51,114 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:51,114 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:51,115 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:51,115 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:51,131 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:51,973 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:51,979 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:51,982 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:52,298 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:52,298 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 31 [2019-10-15 01:32:52,298 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105000174] [2019-10-15 01:32:52,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-15 01:32:52,300 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:52,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-15 01:32:52,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=691, Unknown=0, NotChecked=0, Total=930 [2019-10-15 01:32:52,301 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 31 states. [2019-10-15 01:32:53,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:53,742 INFO L93 Difference]: Finished difference Result 162 states and 210 transitions. [2019-10-15 01:32:53,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-15 01:32:53,743 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 73 [2019-10-15 01:32:53,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:53,744 INFO L225 Difference]: With dead ends: 162 [2019-10-15 01:32:53,744 INFO L226 Difference]: Without dead ends: 126 [2019-10-15 01:32:53,746 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=708, Invalid=2372, Unknown=0, NotChecked=0, Total=3080 [2019-10-15 01:32:53,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-15 01:32:53,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 117. [2019-10-15 01:32:53,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-15 01:32:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 122 transitions. [2019-10-15 01:32:53,764 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 122 transitions. Word has length 73 [2019-10-15 01:32:53,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:53,765 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 122 transitions. [2019-10-15 01:32:53,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-15 01:32:53,765 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 122 transitions. [2019-10-15 01:32:53,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-15 01:32:53,767 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:53,767 INFO L380 BasicCegarLoop]: trace histogram [26, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:53,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:53,974 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:53,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:53,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2141910217, now seen corresponding path program 6 times [2019-10-15 01:32:53,974 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:53,974 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313325554] [2019-10-15 01:32:53,974 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:53,975 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:53,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2019-10-15 01:32:54,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313325554] [2019-10-15 01:32:54,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571599864] [2019-10-15 01:32:54,394 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 01:32:54,561 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:54,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:54,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-15 01:32:54,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2019-10-15 01:32:55,122 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2019-10-15 01:32:56,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1546819325] [2019-10-15 01:32:56,178 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:32:56,178 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:56,178 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:56,178 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:56,179 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:56,201 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:57,021 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:57,027 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:57,030 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:57,515 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:57,516 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29, 29, 11] total 85 [2019-10-15 01:32:57,516 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759559268] [2019-10-15 01:32:57,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-10-15 01:32:57,518 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:57,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-10-15 01:32:57,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1778, Invalid=5362, Unknown=0, NotChecked=0, Total=7140 [2019-10-15 01:32:57,521 INFO L87 Difference]: Start difference. First operand 117 states and 122 transitions. Second operand 85 states. [2019-10-15 01:33:02,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:02,297 INFO L93 Difference]: Finished difference Result 243 states and 284 transitions. [2019-10-15 01:33:02,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-10-15 01:33:02,297 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 113 [2019-10-15 01:33:02,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:02,299 INFO L225 Difference]: With dead ends: 243 [2019-10-15 01:33:02,299 INFO L226 Difference]: Without dead ends: 158 [2019-10-15 01:33:02,306 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6399 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5366, Invalid=21694, Unknown=0, NotChecked=0, Total=27060 [2019-10-15 01:33:02,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-10-15 01:33:02,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2019-10-15 01:33:02,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-10-15 01:33:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2019-10-15 01:33:02,325 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 113 [2019-10-15 01:33:02,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:02,325 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2019-10-15 01:33:02,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-10-15 01:33:02,325 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2019-10-15 01:33:02,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-15 01:33:02,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:02,328 INFO L380 BasicCegarLoop]: trace histogram [54, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:02,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:02,532 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:02,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:02,533 INFO L82 PathProgramCache]: Analyzing trace with hash 357791387, now seen corresponding path program 7 times [2019-10-15 01:33:02,533 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:02,533 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740770651] [2019-10-15 01:33:02,534 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:02,534 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:02,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2055 trivial. 0 not checked. [2019-10-15 01:33:03,019 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740770651] [2019-10-15 01:33:03,019 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066981603] [2019-10-15 01:33:03,019 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 01:33:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:03,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 56 conjunts are in the unsatisfiable core [2019-10-15 01:33:03,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2019-10-15 01:33:04,869 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2019-10-15 01:33:08,564 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2104366429] [2019-10-15 01:33:08,565 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:33:08,566 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:08,566 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:08,567 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:08,567 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:08,585 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:09,507 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:09,515 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:09,518 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:10,161 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:10,162 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 57, 57, 11] total 142 [2019-10-15 01:33:10,162 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020557087] [2019-10-15 01:33:10,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 142 states [2019-10-15 01:33:10,164 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:10,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2019-10-15 01:33:10,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6475, Invalid=13547, Unknown=0, NotChecked=0, Total=20022 [2019-10-15 01:33:10,169 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand 142 states.