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/loop-invariants/mod4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 13:39:29,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 13:39:29,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 13:39:29,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 13:39:29,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 13:39:29,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 13:39:29,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 13:39:29,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 13:39:29,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 13:39:29,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 13:39:29,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 13:39:29,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 13:39:29,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 13:39:29,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 13:39:29,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 13:39:29,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 13:39:29,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 13:39:29,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 13:39:29,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 13:39:30,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 13:39:30,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 13:39:30,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 13:39:30,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 13:39:30,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 13:39:30,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 13:39:30,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 13:39:30,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 13:39:30,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 13:39:30,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 13:39:30,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 13:39:30,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 13:39:30,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 13:39:30,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 13:39:30,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 13:39:30,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 13:39:30,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 13:39:30,034 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 [2019-10-07 13:39:30,053 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 13:39:30,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 13:39:30,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 13:39:30,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 13:39:30,056 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 13:39:30,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 13:39:30,057 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 13:39:30,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 13:39:30,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 13:39:30,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 13:39:30,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 13:39:30,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 13:39:30,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 13:39:30,058 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 13:39:30,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 13:39:30,058 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 13:39:30,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 13:39:30,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 13:39:30,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 13:39:30,059 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 13:39:30,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 13:39:30,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 13:39:30,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 13:39:30,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 13:39:30,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 13:39:30,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 13:39:30,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 13:39:30,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 13:39:30,061 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 [2019-10-07 13:39:30,323 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 13:39:30,337 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 13:39:30,341 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 13:39:30,342 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 13:39:30,342 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 13:39:30,343 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/mod4.c [2019-10-07 13:39:30,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d603851a3/79ddd2fdbc7c4b5ab0a3705ccfa3a61b/FLAGe14c4b0c4 [2019-10-07 13:39:30,829 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 13:39:30,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/mod4.c [2019-10-07 13:39:30,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d603851a3/79ddd2fdbc7c4b5ab0a3705ccfa3a61b/FLAGe14c4b0c4 [2019-10-07 13:39:31,223 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d603851a3/79ddd2fdbc7c4b5ab0a3705ccfa3a61b [2019-10-07 13:39:31,234 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 13:39:31,236 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 13:39:31,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 13:39:31,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 13:39:31,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 13:39:31,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:39:31" (1/1) ... [2019-10-07 13:39:31,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33ff8af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:39:31, skipping insertion in model container [2019-10-07 13:39:31,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:39:31" (1/1) ... [2019-10-07 13:39:31,251 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 13:39:31,269 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 13:39:31,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:39:31,432 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 13:39:31,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:39:31,457 INFO L192 MainTranslator]: Completed translation [2019-10-07 13:39:31,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:39:31 WrapperNode [2019-10-07 13:39:31,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 13:39:31,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 13:39:31,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 13:39:31,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 13:39:31,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:39:31" (1/1) ... [2019-10-07 13:39:31,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:39:31" (1/1) ... [2019-10-07 13:39:31,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:39:31" (1/1) ... [2019-10-07 13:39:31,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:39:31" (1/1) ... [2019-10-07 13:39:31,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:39:31" (1/1) ... [2019-10-07 13:39:31,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:39:31" (1/1) ... [2019-10-07 13:39:31,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:39:31" (1/1) ... [2019-10-07 13:39:31,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 13:39:31,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 13:39:31,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 13:39:31,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 13:39:31,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:39:31" (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 [2019-10-07 13:39:31,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 13:39:31,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 13:39:31,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-07 13:39:31,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 13:39:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 13:39:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 13:39:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-07 13:39:31,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 13:39:31,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 13:39:31,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 13:39:31,754 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 13:39:31,754 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 13:39:31,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:39:31 BoogieIcfgContainer [2019-10-07 13:39:31,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 13:39:31,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 13:39:31,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 13:39:31,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 13:39:31,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 01:39:31" (1/3) ... [2019-10-07 13:39:31,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e1e618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:39:31, skipping insertion in model container [2019-10-07 13:39:31,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:39:31" (2/3) ... [2019-10-07 13:39:31,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e1e618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:39:31, skipping insertion in model container [2019-10-07 13:39:31,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:39:31" (3/3) ... [2019-10-07 13:39:31,763 INFO L109 eAbstractionObserver]: Analyzing ICFG mod4.c [2019-10-07 13:39:31,771 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 13:39:31,777 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 13:39:31,788 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 13:39:31,812 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 13:39:31,812 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 13:39:31,812 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 13:39:31,812 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 13:39:31,813 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 13:39:31,813 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 13:39:31,813 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 13:39:31,813 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 13:39:31,830 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-07 13:39:31,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-07 13:39:31,836 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:39:31,837 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:39:31,838 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:39:31,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:39:31,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2019-10-07 13:39:31,852 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:39:31,852 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:39:31,853 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:39:31,853 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:39:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:39:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:39:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:39:31,940 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:39:31,940 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:39:31,940 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-07 13:39:31,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-07 13:39:31,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-07 13:39:31,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-07 13:39:31,956 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2019-10-07 13:39:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:39:31,974 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-10-07 13:39:31,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-07 13:39:31,975 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-07 13:39:31,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:39:31,983 INFO L225 Difference]: With dead ends: 29 [2019-10-07 13:39:31,983 INFO L226 Difference]: Without dead ends: 12 [2019-10-07 13:39:31,987 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-07 13:39:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-07 13:39:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-07 13:39:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-07 13:39:32,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-07 13:39:32,022 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-07 13:39:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:39:32,023 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-07 13:39:32,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-07 13:39:32,023 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-07 13:39:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 13:39:32,024 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:39:32,024 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:39:32,024 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:39:32,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:39:32,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1890620952, now seen corresponding path program 1 times [2019-10-07 13:39:32,025 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:39:32,025 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:39:32,026 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:39:32,026 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:39:32,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:39:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:39:32,384 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2019-10-07 13:39:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:39:32,402 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:39:32,403 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:39:32,403 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 13:39:32,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 13:39:32,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 13:39:32,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 13:39:32,406 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2019-10-07 13:39:32,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:39:32,435 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-10-07 13:39:32,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 13:39:32,436 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-10-07 13:39:32,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:39:32,437 INFO L225 Difference]: With dead ends: 12 [2019-10-07 13:39:32,437 INFO L226 Difference]: Without dead ends: 0 [2019-10-07 13:39:32,438 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-07 13:39:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-07 13:39:32,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-07 13:39:32,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-07 13:39:32,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-07 13:39:32,440 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2019-10-07 13:39:32,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:39:32,440 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-07 13:39:32,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 13:39:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-07 13:39:32,441 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-07 13:39:32,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-07 13:39:32,495 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-07 13:39:32,495 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-07 13:39:32,496 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-07 13:39:32,496 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-07 13:39:32,496 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-07 13:39:32,496 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-07 13:39:32,497 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 9 16) the Hoare annotation is: true [2019-10-07 13:39:32,497 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 9 16) no Hoare annotation was computed. [2019-10-07 13:39:32,497 INFO L443 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2019-10-07 13:39:32,497 INFO L443 ceAbstractionStarter]: For program point L11-1(lines 11 13) no Hoare annotation was computed. [2019-10-07 13:39:32,498 INFO L439 ceAbstractionStarter]: At program point L11-3(lines 11 13) the Hoare annotation is: (and (<= main_~x~0 (let ((.cse0 (div main_~x~0 4))) (+ (* 4294967296 (div (+ main_~x~0 (* (- 4) .cse0)) 4294967296)) (* 4 .cse0)))) (<= 0 main_~x~0)) [2019-10-07 13:39:32,498 INFO L439 ceAbstractionStarter]: At program point L11-4(lines 11 13) the Hoare annotation is: (and (<= main_~x~0 (let ((.cse0 (div main_~x~0 4))) (+ (* 4294967296 (div (+ main_~x~0 (* (- 4) .cse0)) 4294967296)) (* 4 .cse0)))) (<= 0 main_~x~0)) [2019-10-07 13:39:32,499 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-07 13:39:32,500 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-07 13:39:32,500 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-07 13:39:32,500 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-07 13:39:32,500 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-07 13:39:32,500 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-07 13:39:32,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 01:39:32 BoogieIcfgContainer [2019-10-07 13:39:32,517 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-07 13:39:32,519 INFO L168 Benchmark]: Toolchain (without parser) took 1282.91 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 103.7 MB in the beginning and 132.9 MB in the end (delta: -29.2 MB). Peak memory consumption was 34.2 MB. Max. memory is 7.1 GB. [2019-10-07 13:39:32,521 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory is still 121.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-10-07 13:39:32,527 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.98 ms. Allocated memory is still 138.9 MB. Free memory was 103.3 MB in the beginning and 94.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2019-10-07 13:39:32,530 INFO L168 Benchmark]: Boogie Preprocessor took 95.93 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 94.4 MB in the beginning and 181.0 MB in the end (delta: -86.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2019-10-07 13:39:32,530 INFO L168 Benchmark]: RCFGBuilder took 201.33 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 169.6 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-10-07 13:39:32,532 INFO L168 Benchmark]: TraceAbstraction took 760.42 ms. Allocated memory is still 202.4 MB. Free memory was 169.6 MB in the beginning and 132.9 MB in the end (delta: 36.7 MB). Peak memory consumption was 36.7 MB. Max. memory is 7.1 GB. [2019-10-07 13:39:32,543 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory is still 121.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 220.98 ms. Allocated memory is still 138.9 MB. Free memory was 103.3 MB in the beginning and 94.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 95.93 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 94.4 MB in the beginning and 181.0 MB in the end (delta: -86.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 201.33 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 169.6 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 760.42 ms. Allocated memory is still 202.4 MB. Free memory was 169.6 MB in the beginning and 132.9 MB in the end (delta: 36.7 MB). Peak memory consumption was 36.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: x <= 4294967296 * ((x + -4 * (x / 4)) / 4294967296) + 4 * (x / 4) && 0 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Result: SAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 1 SDslu, 20 SDs, 0 SdLazy, 5 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 8 PreInvPairs, 9 NumberOfFragments, 51 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 901 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...