/usr/bin/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/nla-digbench/lcm2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:04:58,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:04:58,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:04:58,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:04:58,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:04:58,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:04:58,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:04:58,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:04:58,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:04:58,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:04:58,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:04:58,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:04:58,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:04:58,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:04:58,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:04:58,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:04:58,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:04:58,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:04:58,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:04:58,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:04:58,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:04:58,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:04:58,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:04:58,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:04:58,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:04:58,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:04:58,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:04:58,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:04:58,757 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 [2019-11-07 04:04:58,780 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:04:58,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:04:58,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:04:58,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:04:58,782 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:04:58,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:04:58,783 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:04:58,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:04:58,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:04:58,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:04:58,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:04:58,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:04:58,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:04:58,784 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:04:58,784 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:04:58,786 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:04:58,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:04:58,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:04:58,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:04:58,787 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:04:58,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:04:58,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:04:58,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:04:58,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:04:58,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:04:58,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:04:58,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:04:58,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:04:58,788 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 [2019-11-07 04:04:59,058 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:04:59,071 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:04:59,074 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:04:59,076 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:04:59,076 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:04:59,077 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/lcm2.c [2019-11-07 04:04:59,138 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/772e42a7c/6bce0ecdc1e84dcb9ce43bf226532577/FLAG55347abbe [2019-11-07 04:04:59,575 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:04:59,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/lcm2.c [2019-11-07 04:04:59,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/772e42a7c/6bce0ecdc1e84dcb9ce43bf226532577/FLAG55347abbe [2019-11-07 04:04:59,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/772e42a7c/6bce0ecdc1e84dcb9ce43bf226532577 [2019-11-07 04:04:59,974 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:04:59,981 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:04:59,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:04:59,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:04:59,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:04:59,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:04:59" (1/1) ... [2019-11-07 04:05:00,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1604ff12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:04:59, skipping insertion in model container [2019-11-07 04:05:00,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:04:59" (1/1) ... [2019-11-07 04:05:00,024 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:05:00,048 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:05:00,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:05:00,225 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:05:00,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:05:00,259 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:05:00,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:00 WrapperNode [2019-11-07 04:05:00,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:05:00,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:05:00,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:05:00,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:05:00,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:00" (1/1) ... [2019-11-07 04:05:00,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:00" (1/1) ... [2019-11-07 04:05:00,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:00" (1/1) ... [2019-11-07 04:05:00,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:00" (1/1) ... [2019-11-07 04:05:00,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:00" (1/1) ... [2019-11-07 04:05:00,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:00" (1/1) ... [2019-11-07 04:05:00,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:00" (1/1) ... [2019-11-07 04:05:00,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:05:00,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:05:00,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:05:00,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:05:00,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:00" (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 [2019-11-07 04:05:00,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:05:00,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:05:00,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 04:05:00,433 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:05:00,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:05:00,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:05:00,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 04:05:00,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 04:05:00,434 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:05:00,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:05:00,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:05:00,647 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:05:00,647 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 04:05:00,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:05:00 BoogieIcfgContainer [2019-11-07 04:05:00,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:05:00,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:05:00,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:05:00,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:05:00,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:04:59" (1/3) ... [2019-11-07 04:05:00,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22430d28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:05:00, skipping insertion in model container [2019-11-07 04:05:00,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:00" (2/3) ... [2019-11-07 04:05:00,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22430d28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:05:00, skipping insertion in model container [2019-11-07 04:05:00,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:05:00" (3/3) ... [2019-11-07 04:05:00,674 INFO L109 eAbstractionObserver]: Analyzing ICFG lcm2.c [2019-11-07 04:05:00,706 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:05:00,727 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:05:00,748 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:05:00,782 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:05:00,783 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:05:00,783 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:05:00,783 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:05:00,784 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:05:00,784 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:05:00,784 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:05:00,784 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:05:00,802 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-07 04:05:00,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 04:05:00,807 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:05:00,808 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:05:00,810 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:05:00,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:05:00,814 INFO L82 PathProgramCache]: Analyzing trace with hash -835862760, now seen corresponding path program 1 times [2019-11-07 04:05:00,822 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:05:00,822 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465767766] [2019-11-07 04:05:00,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:05:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:05:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:05:00,932 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465767766] [2019-11-07 04:05:00,932 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:05:00,932 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 04:05:00,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837681414] [2019-11-07 04:05:00,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 04:05:00,938 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:05:00,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 04:05:00,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 04:05:00,952 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-07 04:05:00,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:05:00,975 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-11-07 04:05:00,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 04:05:00,976 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-07 04:05:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:05:00,986 INFO L225 Difference]: With dead ends: 33 [2019-11-07 04:05:00,986 INFO L226 Difference]: Without dead ends: 15 [2019-11-07 04:05:00,989 INFO L630 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 [2019-11-07 04:05:01,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-07 04:05:01,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-07 04:05:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-07 04:05:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-07 04:05:01,030 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-11-07 04:05:01,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:05:01,030 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-07 04:05:01,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 04:05:01,030 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-11-07 04:05:01,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 04:05:01,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:05:01,031 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:05:01,032 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:05:01,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:05:01,032 INFO L82 PathProgramCache]: Analyzing trace with hash -871939661, now seen corresponding path program 1 times [2019-11-07 04:05:01,033 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:05:01,033 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156951524] [2019-11-07 04:05:01,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:05:01,043 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 04:05:01,043 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572039094] [2019-11-07 04:05:01,044 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 [2019-11-07 04:05:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:05:01,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-07 04:05:01,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:05:01,156 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:05:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:05:01,192 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:05:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:05:01,263 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156951524] [2019-11-07 04:05:01,263 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 04:05:01,264 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572039094] [2019-11-07 04:05:01,264 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:05:01,264 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-07 04:05:01,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547067774] [2019-11-07 04:05:01,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 04:05:01,266 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:05:01,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 04:05:01,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:05:01,268 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2019-11-07 04:05:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:05:01,353 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2019-11-07 04:05:01,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 04:05:01,354 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-11-07 04:05:01,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:05:01,355 INFO L225 Difference]: With dead ends: 19 [2019-11-07 04:05:01,355 INFO L226 Difference]: Without dead ends: 0 [2019-11-07 04:05:01,357 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-07 04:05:01,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-07 04:05:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-07 04:05:01,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-07 04:05:01,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-07 04:05:01,358 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2019-11-07 04:05:01,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:05:01,359 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-07 04:05:01,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 04:05:01,359 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-07 04:05:01,359 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-07 04:05:01,562 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:05:01,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-07 04:05:01,720 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-11-07 04:05:01,721 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-07 04:05:01,721 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-07 04:05:01,721 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-07 04:05:01,721 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-07 04:05:01,722 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-07 04:05:01,722 INFO L439 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (= (* (* main_~a~0 2) main_~b~0) (+ (* main_~y~0 main_~v~0) (* main_~x~0 main_~u~0))) [2019-11-07 04:05:01,722 INFO L443 ceAbstractionStarter]: For program point L27-1(lines 26 39) no Hoare annotation was computed. [2019-11-07 04:05:01,722 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 13 46) no Hoare annotation was computed. [2019-11-07 04:05:01,723 INFO L439 ceAbstractionStarter]: At program point L32-2(lines 26 39) the Hoare annotation is: (= (* (* main_~a~0 2) main_~b~0) (+ (* main_~y~0 main_~v~0) (* main_~x~0 main_~u~0))) [2019-11-07 04:05:01,723 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 13 46) the Hoare annotation is: true [2019-11-07 04:05:01,723 INFO L439 ceAbstractionStarter]: At program point L26-2(lines 26 39) the Hoare annotation is: (= (* (* main_~a~0 2) main_~b~0) (+ (* main_~y~0 main_~v~0) (* main_~x~0 main_~u~0))) [2019-11-07 04:05:01,723 INFO L443 ceAbstractionStarter]: For program point L41(line 41) no Hoare annotation was computed. [2019-11-07 04:05:01,723 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 5 11) the Hoare annotation is: true [2019-11-07 04:05:01,724 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 5 11) no Hoare annotation was computed. [2019-11-07 04:05:01,724 INFO L443 ceAbstractionStarter]: For program point L7(lines 7 8) no Hoare annotation was computed. [2019-11-07 04:05:01,724 INFO L443 ceAbstractionStarter]: For program point L6(lines 6 9) no Hoare annotation was computed. [2019-11-07 04:05:01,724 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2019-11-07 04:05:01,724 INFO L443 ceAbstractionStarter]: For program point L6-2(lines 5 11) no Hoare annotation was computed. [2019-11-07 04:05:01,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 04:05:01 BoogieIcfgContainer [2019-11-07 04:05:01,741 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 04:05:01,751 INFO L168 Benchmark]: Toolchain (without parser) took 1774.64 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 103.3 MB in the beginning and 120.4 MB in the end (delta: -17.0 MB). Peak memory consumption was 40.6 MB. Max. memory is 7.1 GB. [2019-11-07 04:05:01,752 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 146.8 MB. Free memory is still 121.4 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-11-07 04:05:01,754 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.65 ms. Allocated memory is still 146.8 MB. Free memory was 103.3 MB in the beginning and 93.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-11-07 04:05:01,756 INFO L168 Benchmark]: Boogie Preprocessor took 122.03 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 93.4 MB in the beginning and 183.1 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2019-11-07 04:05:01,758 INFO L168 Benchmark]: RCFGBuilder took 266.54 ms. Allocated memory is still 204.5 MB. Free memory was 183.1 MB in the beginning and 169.2 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2019-11-07 04:05:01,759 INFO L168 Benchmark]: TraceAbstraction took 1098.07 ms. Allocated memory is still 204.5 MB. Free memory was 169.2 MB in the beginning and 120.4 MB in the end (delta: 48.9 MB). Peak memory consumption was 48.9 MB. Max. memory is 7.1 GB. [2019-11-07 04:05:01,763 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 146.8 MB. Free memory is still 121.4 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 269.65 ms. Allocated memory is still 146.8 MB. Free memory was 103.3 MB in the beginning and 93.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.03 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 93.4 MB in the beginning and 183.1 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 266.54 ms. Allocated memory is still 204.5 MB. Free memory was 183.1 MB in the beginning and 169.2 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1098.07 ms. Allocated memory is still 204.5 MB. Free memory was 169.2 MB in the beginning and 120.4 MB in the end (delta: 48.9 MB). Peak memory consumption was 48.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 26]: Loop Invariant Derived loop invariant: a * 2 * b == y * v + x * u - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Result: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 29 SDtfs, 10 SDslu, 28 SDs, 0 SdLazy, 23 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 8 LocationsWithAnnotation, 13 PreInvPairs, 19 NumberOfFragments, 44 HoareAnnotationTreeSize, 13 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 51 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 819 SizeOfPredicates, 2 NumberOfNonLiveVariables, 38 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...