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_minInArray_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:34:46,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:34:46,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:34:46,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:34:46,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:34:46,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:34:46,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:34:46,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:34:46,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:34:46,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:34:46,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:34:46,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:34:46,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:34:46,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:34:46,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:34:46,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:34:46,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:34:46,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:34:46,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:34:46,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:34:46,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:34:46,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:34:46,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:34:46,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:34:46,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:34:46,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:34:46,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:34:46,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:34:46,844 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 01:34:46,867 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:34:46,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:34:46,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:34:46,870 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:34:46,870 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:34:46,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:34:46,871 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:34:46,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:34:46,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:34:46,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:34:46,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:34:46,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:34:46,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:34:46,873 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:34:46,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:34:46,874 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:34:46,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:34:46,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:34:46,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:34:46,875 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:34:46,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:34:46,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:46,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:34:46,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:34:46,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:34:46,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:34:46,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:34:46,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:34:46,877 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 01:34:47,143 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:34:47,157 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:34:47,161 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:34:47,162 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:34:47,163 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:34:47,163 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i [2019-10-15 01:34:47,225 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d322c2c7b/9c6e69b8e801431d83c922e7551bf00e/FLAG3dd09d3f6 [2019-10-15 01:34:47,684 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:34:47,685 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i [2019-10-15 01:34:47,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d322c2c7b/9c6e69b8e801431d83c922e7551bf00e/FLAG3dd09d3f6 [2019-10-15 01:34:48,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d322c2c7b/9c6e69b8e801431d83c922e7551bf00e [2019-10-15 01:34:48,059 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:48,060 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:48,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:48,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:48,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:48,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:48" (1/1) ... [2019-10-15 01:34:48,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@616dfd38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:48, skipping insertion in model container [2019-10-15 01:34:48,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:48" (1/1) ... [2019-10-15 01:34:48,077 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:48,096 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:48,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:48,278 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:48,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:48,324 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:48,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:48 WrapperNode [2019-10-15 01:34:48,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:48,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:48,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:48,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:48,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:48" (1/1) ... [2019-10-15 01:34:48,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:48" (1/1) ... [2019-10-15 01:34:48,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:48" (1/1) ... [2019-10-15 01:34:48,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:48" (1/1) ... [2019-10-15 01:34:48,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:48" (1/1) ... [2019-10-15 01:34:48,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:48" (1/1) ... [2019-10-15 01:34:48,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:48" (1/1) ... [2019-10-15 01:34:48,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:48,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:48,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:48,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:48,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:48" (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 01:34:48,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:48,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:48,497 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:48,497 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:48,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:34:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:48,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:48,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:48,925 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:48,925 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:34:48,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:48 BoogieIcfgContainer [2019-10-15 01:34:48,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:48,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:48,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:48,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:48,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:48" (1/3) ... [2019-10-15 01:34:48,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1546bb7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:48, skipping insertion in model container [2019-10-15 01:34:48,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:48" (2/3) ... [2019-10-15 01:34:48,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1546bb7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:48, skipping insertion in model container [2019-10-15 01:34:48,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:48" (3/3) ... [2019-10-15 01:34:48,934 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-2.i [2019-10-15 01:34:48,942 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:48,951 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:48,962 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:48,987 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:48,987 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:48,987 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:48,987 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:48,987 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:48,987 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:48,988 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:48,988 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:49,003 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:34:49,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:34:49,009 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:49,010 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:49,012 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:49,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:49,019 INFO L82 PathProgramCache]: Analyzing trace with hash -242987165, now seen corresponding path program 1 times [2019-10-15 01:34:49,028 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:49,028 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575743055] [2019-10-15 01:34:49,029 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:49,029 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:49,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:49,184 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 01:34:49,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575743055] [2019-10-15 01:34:49,186 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:49,187 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:49,187 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636514319] [2019-10-15 01:34:49,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:49,191 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:49,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:49,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:49,205 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-15 01:34:49,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:49,253 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2019-10-15 01:34:49,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:49,255 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:34:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:49,264 INFO L225 Difference]: With dead ends: 34 [2019-10-15 01:34:49,264 INFO L226 Difference]: Without dead ends: 18 [2019-10-15 01:34:49,268 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 01:34:49,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-15 01:34:49,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-15 01:34:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:34:49,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-15 01:34:49,310 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2019-10-15 01:34:49,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:49,310 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-15 01:34:49,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:49,311 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-15 01:34:49,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:34:49,312 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:49,313 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:49,314 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:49,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:49,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1448285990, now seen corresponding path program 1 times [2019-10-15 01:34:49,315 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:49,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999481334] [2019-10-15 01:34:49,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:49,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:49,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:34:49,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999481334] [2019-10-15 01:34:49,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573894914] [2019-10-15 01:34:49,408 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 01:34:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:49,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:49,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:34:49,505 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:34:49,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2078982152] [2019-10-15 01:34:49,574 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:34:49,575 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:49,605 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:49,619 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:49,620 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:49,824 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:50,167 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:34:50,219 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:50,229 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:50,586 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:50,587 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:34:50,587 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458301298] [2019-10-15 01:34:50,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:34:50,590 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:50,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:34:50,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:34:50,591 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 17 states. [2019-10-15 01:34:51,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:51,126 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2019-10-15 01:34:51,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:34:51,128 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2019-10-15 01:34:51,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:51,137 INFO L225 Difference]: With dead ends: 38 [2019-10-15 01:34:51,137 INFO L226 Difference]: Without dead ends: 27 [2019-10-15 01:34:51,139 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:34:51,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-15 01:34:51,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2019-10-15 01:34:51,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:34:51,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-15 01:34:51,164 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-10-15 01:34:51,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:51,164 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-15 01:34:51,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:34:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-15 01:34:51,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:34:51,166 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:51,166 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:51,370 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:51,370 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:51,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:51,371 INFO L82 PathProgramCache]: Analyzing trace with hash 119243939, now seen corresponding path program 2 times [2019-10-15 01:34:51,371 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:51,371 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752524570] [2019-10-15 01:34:51,372 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:51,372 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:51,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:51,489 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752524570] [2019-10-15 01:34:51,489 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385924710] [2019-10-15 01:34:51,490 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 01:34:51,559 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:34:51,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:51,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:34:51,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:51,585 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:51,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1534274151] [2019-10-15 01:34:51,646 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:34:51,646 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:51,647 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:51,647 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:51,647 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:51,683 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:51,828 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:34:51,859 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:51,867 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:52,146 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:52,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-10-15 01:34:52,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489325960] [2019-10-15 01:34:52,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:34:52,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:52,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:34:52,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:34:52,149 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 23 states. [2019-10-15 01:34:52,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:52,882 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2019-10-15 01:34:52,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:34:52,887 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2019-10-15 01:34:52,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:52,888 INFO L225 Difference]: With dead ends: 53 [2019-10-15 01:34:52,888 INFO L226 Difference]: Without dead ends: 39 [2019-10-15 01:34:52,890 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:34:52,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-15 01:34:52,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2019-10-15 01:34:52,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 01:34:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-10-15 01:34:52,899 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 20 [2019-10-15 01:34:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:52,900 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-10-15 01:34:52,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:34:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-10-15 01:34:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:34:52,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:52,901 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:53,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:53,106 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:53,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:53,107 INFO L82 PathProgramCache]: Analyzing trace with hash 92938371, now seen corresponding path program 3 times [2019-10-15 01:34:53,107 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:53,107 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029406769] [2019-10-15 01:34:53,107 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:53,107 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:53,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:34:53,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029406769] [2019-10-15 01:34:53,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540162902] [2019-10-15 01:34:53,305 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 01:34:53,384 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:34:53,385 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:53,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:34:53,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:34:53,406 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:34:53,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97136199] [2019-10-15 01:34:53,642 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:34:53,642 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:53,643 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:53,643 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:53,643 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:53,680 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:53,808 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:34:53,828 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:53,834 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:54,169 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:54,169 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-10-15 01:34:54,170 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991831518] [2019-10-15 01:34:54,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:34:54,171 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:54,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:34:54,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:34:54,173 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 35 states. [2019-10-15 01:34:55,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:55,478 INFO L93 Difference]: Finished difference Result 83 states and 111 transitions. [2019-10-15 01:34:55,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:34:55,479 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 32 [2019-10-15 01:34:55,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:55,481 INFO L225 Difference]: With dead ends: 83 [2019-10-15 01:34:55,482 INFO L226 Difference]: Without dead ends: 63 [2019-10-15 01:34:55,484 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=979, Invalid=3053, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:34:55,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-15 01:34:55,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2019-10-15 01:34:55,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-15 01:34:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-10-15 01:34:55,497 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 32 [2019-10-15 01:34:55,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:55,497 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-10-15 01:34:55,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:34:55,498 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-10-15 01:34:55,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-15 01:34:55,499 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:55,499 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:55,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:55,704 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:55,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:55,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1097584707, now seen corresponding path program 4 times [2019-10-15 01:34:55,705 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:55,705 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539314812] [2019-10-15 01:34:55,705 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:55,705 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:55,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:34:56,207 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539314812] [2019-10-15 01:34:56,207 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138934782] [2019-10-15 01:34:56,207 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 01:34:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:56,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:34:56,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:34:56,358 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:34:57,053 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1924387166] [2019-10-15 01:34:57,055 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:34:57,055 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:57,056 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:57,056 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:57,056 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:57,101 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:57,208 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:34:57,225 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:57,230 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:57,651 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:57,652 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 59 [2019-10-15 01:34:57,652 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485616012] [2019-10-15 01:34:57,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:34:57,654 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:57,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:34:57,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1206, Invalid=2216, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:34:57,656 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 59 states. [2019-10-15 01:35:00,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:00,959 INFO L93 Difference]: Finished difference Result 143 states and 195 transitions. [2019-10-15 01:35:00,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:35:00,960 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 56 [2019-10-15 01:35:00,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:00,962 INFO L225 Difference]: With dead ends: 143 [2019-10-15 01:35:00,962 INFO L226 Difference]: Without dead ends: 111 [2019-10-15 01:35:00,969 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2755 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3607, Invalid=8825, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:35:00,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-15 01:35:00,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2019-10-15 01:35:00,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-15 01:35:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2019-10-15 01:35:01,000 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 56 [2019-10-15 01:35:01,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:01,000 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2019-10-15 01:35:01,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:35:01,000 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2019-10-15 01:35:01,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 01:35:01,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:01,004 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:01,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:01,216 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:01,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:01,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1168568381, now seen corresponding path program 5 times [2019-10-15 01:35:01,218 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:01,220 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929720786] [2019-10-15 01:35:01,220 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:01,220 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:01,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:35:02,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929720786] [2019-10-15 01:35:02,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878194886] [2019-10-15 01:35:02,336 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 01:35:20,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-10-15 01:35:20,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:20,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 48 conjunts are in the unsatisfiable core [2019-10-15 01:35:20,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:35:20,206 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:35:22,647 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [226890074] [2019-10-15 01:35:22,649 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:22,649 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:22,649 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:22,650 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:22,650 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:22,676 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:22,778 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:35:22,790 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:22,794 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:23,266 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:23,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49, 11] total 107 [2019-10-15 01:35:23,267 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114371724] [2019-10-15 01:35:23,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 107 states [2019-10-15 01:35:23,269 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:23,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2019-10-15 01:35:23,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4686, Invalid=6656, Unknown=0, NotChecked=0, Total=11342 [2019-10-15 01:35:23,274 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 107 states. [2019-10-15 01:35:31,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:31,923 INFO L93 Difference]: Finished difference Result 263 states and 363 transitions. [2019-10-15 01:35:31,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2019-10-15 01:35:31,924 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 104 [2019-10-15 01:35:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:31,929 INFO L225 Difference]: With dead ends: 263 [2019-10-15 01:35:31,930 INFO L226 Difference]: Without dead ends: 207 [2019-10-15 01:35:31,939 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8407 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=14047, Invalid=29009, Unknown=0, NotChecked=0, Total=43056 [2019-10-15 01:35:31,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-10-15 01:35:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2019-10-15 01:35:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-10-15 01:35:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2019-10-15 01:35:31,987 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 104 [2019-10-15 01:35:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:31,988 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2019-10-15 01:35:31,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 107 states. [2019-10-15 01:35:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2019-10-15 01:35:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-10-15 01:35:31,991 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:31,992 INFO L380 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:32,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:32,204 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:32,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:32,205 INFO L82 PathProgramCache]: Analyzing trace with hash -577040701, now seen corresponding path program 6 times [2019-10-15 01:35:32,205 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:32,206 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441718347] [2019-10-15 01:35:32,206 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:32,206 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:32,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat