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-programs/copysome1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:37:31,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:37:31,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:37:31,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:37:31,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:37:31,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:37:31,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:37:31,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:37:31,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:37:31,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:37:31,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:37:31,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:37:31,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:37:31,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:37:31,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:37:31,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:37:31,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:37:31,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:37:31,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:37:31,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:37:31,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:37:31,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:37:31,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:37:31,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:37:31,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:37:31,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:37:31,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:37:31,837 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:37:31,838 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:37:31,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:37:31,839 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:37:31,840 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:37:31,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:37:31,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:37:31,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:37:31,842 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:37:31,843 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:37:31,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:37:31,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:37:31,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:37:31,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:37:31,846 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 01:37:31,859 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:37:31,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:37:31,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:37:31,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:37:31,861 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:37:31,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:37:31,862 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:37:31,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:37:31,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:37:31,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:37:31,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:37:31,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:37:31,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:37:31,863 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:37:31,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:37:31,863 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:37:31,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:37:31,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:37:31,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:37:31,864 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:37:31,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:37:31,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:37:31,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:37:31,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:37:31,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:37:31,865 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:37:31,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:37:31,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:37:31,866 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 01:37:32,160 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:37:32,173 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:37:32,178 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:37:32,179 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:37:32,179 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:37:32,180 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-2.i [2019-10-15 01:37:32,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660a5a600/329021f2ebe2495abfc06e7ea775a210/FLAGb15653499 [2019-10-15 01:37:32,698 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:37:32,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-2.i [2019-10-15 01:37:32,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660a5a600/329021f2ebe2495abfc06e7ea775a210/FLAGb15653499 [2019-10-15 01:37:33,135 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660a5a600/329021f2ebe2495abfc06e7ea775a210 [2019-10-15 01:37:33,145 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:37:33,146 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:37:33,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:33,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:37:33,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:37:33,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:33" (1/1) ... [2019-10-15 01:37:33,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32777701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:33, skipping insertion in model container [2019-10-15 01:37:33,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:33" (1/1) ... [2019-10-15 01:37:33,160 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:37:33,175 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:37:33,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:33,350 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:37:33,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:33,383 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:37:33,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:33 WrapperNode [2019-10-15 01:37:33,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:33,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:37:33,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:37:33,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:37:33,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:33" (1/1) ... [2019-10-15 01:37:33,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:33" (1/1) ... [2019-10-15 01:37:33,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:33" (1/1) ... [2019-10-15 01:37:33,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:33" (1/1) ... [2019-10-15 01:37:33,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:33" (1/1) ... [2019-10-15 01:37:33,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:33" (1/1) ... [2019-10-15 01:37:33,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:33" (1/1) ... [2019-10-15 01:37:33,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:37:33,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:37:33,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:37:33,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:37:33,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:33" (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 01:37:33,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:37:33,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:37:33,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:37:33,551 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:37:33,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:37:33,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:37:33,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:37:33,552 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:37:33,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:37:33,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:37:33,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:37:33,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:37:33,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:37:33,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:37:33,933 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:37:33,933 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:37:33,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:33 BoogieIcfgContainer [2019-10-15 01:37:33,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:37:33,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:37:33,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:37:33,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:37:33,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:37:33" (1/3) ... [2019-10-15 01:37:33,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20cfde66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:33, skipping insertion in model container [2019-10-15 01:37:33,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:33" (2/3) ... [2019-10-15 01:37:33,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20cfde66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:33, skipping insertion in model container [2019-10-15 01:37:33,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:33" (3/3) ... [2019-10-15 01:37:33,943 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2019-10-15 01:37:33,950 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:37:33,958 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:37:33,969 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:37:33,993 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:37:33,993 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:37:33,993 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:37:33,993 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:37:33,993 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:37:33,994 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:37:33,994 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:37:33,994 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:37:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-15 01:37:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:37:34,017 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:34,017 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:34,019 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:34,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:34,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1868090127, now seen corresponding path program 1 times [2019-10-15 01:37:34,030 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:34,030 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893869868] [2019-10-15 01:37:34,031 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:34,031 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:34,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:34,176 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 01:37:34,177 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893869868] [2019-10-15 01:37:34,178 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:34,178 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:37:34,179 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844301890] [2019-10-15 01:37:34,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:37:34,184 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:34,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:37:34,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:37:34,201 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-10-15 01:37:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:34,250 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2019-10-15 01:37:34,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:37:34,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:37:34,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:34,260 INFO L225 Difference]: With dead ends: 38 [2019-10-15 01:37:34,260 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:37:34,264 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 01:37:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:37:34,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:37:34,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:37:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-10-15 01:37:34,303 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2019-10-15 01:37:34,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:34,303 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-10-15 01:37:34,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:37:34,304 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-10-15 01:37:34,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:37:34,305 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:34,305 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:34,305 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:34,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:34,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1341324973, now seen corresponding path program 1 times [2019-10-15 01:37:34,306 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:34,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852750717] [2019-10-15 01:37:34,307 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:34,307 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:34,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:34,402 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 01:37:34,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852750717] [2019-10-15 01:37:34,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304048921] [2019-10-15 01:37:34,403 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 01:37:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:34,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:34,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:34,497 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 01:37:34,497 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:34,526 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 01:37:34,527 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443483825] [2019-10-15 01:37:34,551 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:37:34,551 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:34,557 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:34,564 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:34,565 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:34,717 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:37,198 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:37:37,222 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:37,235 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:37,566 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:37:37,567 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:37:37,567 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877200705] [2019-10-15 01:37:37,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:37:37,569 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:37,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:37:37,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:37:37,570 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 17 states. [2019-10-15 01:37:38,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:38,218 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2019-10-15 01:37:38,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:37:38,220 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2019-10-15 01:37:38,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:38,221 INFO L225 Difference]: With dead ends: 50 [2019-10-15 01:37:38,221 INFO L226 Difference]: Without dead ends: 37 [2019-10-15 01:37:38,223 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:37:38,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-15 01:37:38,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2019-10-15 01:37:38,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 01:37:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-10-15 01:37:38,235 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 15 [2019-10-15 01:37:38,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:38,240 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-10-15 01:37:38,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:37:38,240 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-10-15 01:37:38,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:37:38,241 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:38,243 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:38,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:38,447 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:38,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:38,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2023407985, now seen corresponding path program 2 times [2019-10-15 01:37:38,449 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:38,449 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463676253] [2019-10-15 01:37:38,450 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:38,450 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:38,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:38,572 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 01:37:38,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463676253] [2019-10-15 01:37:38,575 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292391686] [2019-10-15 01:37:38,576 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 01:37:38,631 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:37:38,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:38,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:37:38,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:38,648 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 01:37:38,649 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:38,705 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 01:37:38,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [700024235] [2019-10-15 01:37:38,707 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:37:38,707 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:38,708 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:38,708 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:38,708 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:38,736 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:39,010 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:37:39,027 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:39,032 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:39,419 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:37:39,420 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-10-15 01:37:39,420 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283632908] [2019-10-15 01:37:39,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:37:39,421 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:39,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:37:39,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:37:39,423 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 23 states. [2019-10-15 01:37:40,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:40,172 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2019-10-15 01:37:40,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:37:40,172 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 21 [2019-10-15 01:37:40,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:40,173 INFO L225 Difference]: With dead ends: 67 [2019-10-15 01:37:40,174 INFO L226 Difference]: Without dead ends: 49 [2019-10-15 01:37:40,175 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:37:40,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-15 01:37:40,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2019-10-15 01:37:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-15 01:37:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-10-15 01:37:40,184 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 21 [2019-10-15 01:37:40,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:40,184 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-10-15 01:37:40,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:37:40,185 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-10-15 01:37:40,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 01:37:40,186 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:40,186 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:40,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:40,390 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:40,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:40,391 INFO L82 PathProgramCache]: Analyzing trace with hash -263599153, now seen corresponding path program 3 times [2019-10-15 01:37:40,391 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:40,391 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116168796] [2019-10-15 01:37:40,391 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:40,391 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:40,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:40,602 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 01:37:40,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116168796] [2019-10-15 01:37:40,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337019207] [2019-10-15 01:37:40,605 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 01:37:40,694 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:37:40,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:40,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:37:40,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:40,725 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 01:37:40,725 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:40,948 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 01:37:40,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1800999193] [2019-10-15 01:37:40,950 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:37:40,950 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:40,950 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:40,950 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:40,951 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:40,973 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:41,218 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:37:41,230 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:41,235 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:41,718 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:37:41,718 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-10-15 01:37:41,718 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101775020] [2019-10-15 01:37:41,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:37:41,720 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:41,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:37:41,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:37:41,723 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 35 states. [2019-10-15 01:37:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:43,098 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2019-10-15 01:37:43,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:37:43,098 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 33 [2019-10-15 01:37:43,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:43,100 INFO L225 Difference]: With dead ends: 97 [2019-10-15 01:37:43,100 INFO L226 Difference]: Without dead ends: 73 [2019-10-15 01:37:43,103 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=979, Invalid=3053, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:37:43,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-15 01:37:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2019-10-15 01:37:43,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-15 01:37:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2019-10-15 01:37:43,115 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 33 [2019-10-15 01:37:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:43,115 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2019-10-15 01:37:43,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:37:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2019-10-15 01:37:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 01:37:43,117 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:43,117 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:43,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:43,322 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:43,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:43,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1677613489, now seen corresponding path program 4 times [2019-10-15 01:37:43,323 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:43,323 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608924780] [2019-10-15 01:37:43,323 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:43,324 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:43,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:43,744 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 01:37:43,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608924780] [2019-10-15 01:37:43,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137483408] [2019-10-15 01:37:43,745 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 01:37:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:43,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:37:43,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:43,889 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 01:37:43,890 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:44,749 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 01:37:44,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [247082926] [2019-10-15 01:37:44,751 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:37:44,751 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:44,752 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:44,752 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:44,752 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:44,771 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:44,940 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:37:44,951 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:44,954 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:45,359 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:37:45,359 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 59 [2019-10-15 01:37:45,359 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894107849] [2019-10-15 01:37:45,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:37:45,361 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:45,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:37:45,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1206, Invalid=2216, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:37:45,364 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 59 states. [2019-10-15 01:37:48,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:48,479 INFO L93 Difference]: Finished difference Result 157 states and 210 transitions. [2019-10-15 01:37:48,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:37:48,479 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 57 [2019-10-15 01:37:48,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:48,482 INFO L225 Difference]: With dead ends: 157 [2019-10-15 01:37:48,482 INFO L226 Difference]: Without dead ends: 121 [2019-10-15 01:37:48,487 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2827 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3607, Invalid=8825, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:37:48,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-10-15 01:37:48,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2019-10-15 01:37:48,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-15 01:37:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2019-10-15 01:37:48,504 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 57 [2019-10-15 01:37:48,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:48,504 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2019-10-15 01:37:48,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:37:48,504 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2019-10-15 01:37:48,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-15 01:37:48,507 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:48,508 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:48,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:48,710 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:48,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:48,711 INFO L82 PathProgramCache]: Analyzing trace with hash 437017423, now seen corresponding path program 5 times [2019-10-15 01:37:48,711 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:48,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995365978] [2019-10-15 01:37:48,712 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:48,712 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:48,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:49,896 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 01:37:49,897 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995365978] [2019-10-15 01:37:49,897 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93275724] [2019-10-15 01:37:49,897 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