/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/loop-acceleration/underapprox_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 03:59:27,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 03:59:27,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 03:59:27,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 03:59:27,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 03:59:27,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 03:59:27,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 03:59:27,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 03:59:27,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 03:59:27,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 03:59:27,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 03:59:27,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 03:59:27,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 03:59:27,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 03:59:27,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 03:59:27,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 03:59:27,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 03:59:27,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 03:59:27,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 03:59:27,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 03:59:27,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 03:59:27,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 03:59:27,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 03:59:27,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 03:59:27,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 03:59:27,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 03:59:27,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 03:59:27,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 03:59:27,660 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 03:59:27,676 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 03:59:27,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 03:59:27,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 03:59:27,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 03:59:27,678 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 03:59:27,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 03:59:27,678 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 03:59:27,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 03:59:27,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 03:59:27,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 03:59:27,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 03:59:27,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 03:59:27,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 03:59:27,679 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 03:59:27,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 03:59:27,680 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 03:59:27,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 03:59:27,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 03:59:27,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 03:59:27,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 03:59:27,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 03:59:27,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:59:27,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 03:59:27,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 03:59:27,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 03:59:27,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 03:59:27,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 03:59:27,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 03:59:27,682 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 03:59:28,002 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 03:59:28,021 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 03:59:28,025 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 03:59:28,027 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 03:59:28,027 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 03:59:28,028 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2019-11-07 03:59:28,086 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77c1bffe3/a4ac1748910943c7a44d67beaa3e8c82/FLAG6c3c6b6ae [2019-11-07 03:59:28,528 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 03:59:28,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2019-11-07 03:59:28,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77c1bffe3/a4ac1748910943c7a44d67beaa3e8c82/FLAG6c3c6b6ae [2019-11-07 03:59:28,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77c1bffe3/a4ac1748910943c7a44d67beaa3e8c82 [2019-11-07 03:59:28,943 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 03:59:28,945 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 03:59:28,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 03:59:28,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 03:59:28,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 03:59:28,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:59:28" (1/1) ... [2019-11-07 03:59:28,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fbc0dd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:28, skipping insertion in model container [2019-11-07 03:59:28,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:59:28" (1/1) ... [2019-11-07 03:59:28,963 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 03:59:28,982 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 03:59:29,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:59:29,148 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 03:59:29,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:59:29,173 INFO L192 MainTranslator]: Completed translation [2019-11-07 03:59:29,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:29 WrapperNode [2019-11-07 03:59:29,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 03:59:29,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 03:59:29,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 03:59:29,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 03:59:29,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:29" (1/1) ... [2019-11-07 03:59:29,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:29" (1/1) ... [2019-11-07 03:59:29,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:29" (1/1) ... [2019-11-07 03:59:29,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:29" (1/1) ... [2019-11-07 03:59:29,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:29" (1/1) ... [2019-11-07 03:59:29,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:29" (1/1) ... [2019-11-07 03:59:29,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:29" (1/1) ... [2019-11-07 03:59:29,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 03:59:29,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 03:59:29,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 03:59:29,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 03:59:29,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:29" (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 03:59:29,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 03:59:29,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 03:59:29,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 03:59:29,343 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 03:59:29,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 03:59:29,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 03:59:29,343 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 03:59:29,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 03:59:29,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 03:59:29,516 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 03:59:29,517 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 03:59:29,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:59:29 BoogieIcfgContainer [2019-11-07 03:59:29,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 03:59:29,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 03:59:29,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 03:59:29,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 03:59:29,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:59:28" (1/3) ... [2019-11-07 03:59:29,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf7c35f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:59:29, skipping insertion in model container [2019-11-07 03:59:29,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:59:29" (2/3) ... [2019-11-07 03:59:29,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf7c35f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:59:29, skipping insertion in model container [2019-11-07 03:59:29,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:59:29" (3/3) ... [2019-11-07 03:59:29,526 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2019-11-07 03:59:29,534 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 03:59:29,542 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 03:59:29,556 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 03:59:29,581 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 03:59:29,582 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 03:59:29,582 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 03:59:29,582 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 03:59:29,582 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 03:59:29,582 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 03:59:29,582 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 03:59:29,583 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 03:59:29,601 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-07 03:59:29,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 03:59:29,606 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:29,607 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:29,608 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:29,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:29,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1869232855, now seen corresponding path program 1 times [2019-11-07 03:59:29,623 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:29,624 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963369546] [2019-11-07 03:59:29,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:29,809 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 03:59:29,810 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963369546] [2019-11-07 03:59:29,811 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:59:29,811 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:59:29,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626669624] [2019-11-07 03:59:29,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:59:29,822 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:29,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:59:29,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:59:29,843 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-11-07 03:59:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:59:29,903 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-11-07 03:59:29,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:59:29,906 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-07 03:59:29,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:59:29,922 INFO L225 Difference]: With dead ends: 29 [2019-11-07 03:59:29,922 INFO L226 Difference]: Without dead ends: 12 [2019-11-07 03:59:29,928 INFO L630 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 [2019-11-07 03:59:29,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-07 03:59:30,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-07 03:59:30,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-07 03:59:30,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-07 03:59:30,040 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-11-07 03:59:30,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:59:30,043 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-07 03:59:30,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:59:30,043 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-07 03:59:30,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 03:59:30,044 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:30,045 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:30,047 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:30,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:30,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1455464170, now seen corresponding path program 1 times [2019-11-07 03:59:30,048 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:30,048 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124651166] [2019-11-07 03:59:30,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:30,188 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124651166] [2019-11-07 03:59:30,188 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559603931] [2019-11-07 03:59:30,189 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 03:59:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:30,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 03:59:30,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:59:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:30,295 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:59:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:30,355 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1239404415] [2019-11-07 03:59:30,379 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-07 03:59:30,379 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:59:30,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:59:30,399 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:59:30,399 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:59:30,464 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-11-07 03:59:30,609 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2019-11-07 03:59:30,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-11-07 03:59:30,625 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:59:30,898 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:59:30,898 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 6] total 12 [2019-11-07 03:59:30,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538496556] [2019-11-07 03:59:30,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-07 03:59:30,905 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:30,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-07 03:59:30,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-11-07 03:59:30,906 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2019-11-07 03:59:31,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:59:31,085 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-11-07 03:59:31,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-07 03:59:31,087 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-11-07 03:59:31,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:59:31,088 INFO L225 Difference]: With dead ends: 20 [2019-11-07 03:59:31,088 INFO L226 Difference]: Without dead ends: 15 [2019-11-07 03:59:31,090 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-07 03:59:31,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-07 03:59:31,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-07 03:59:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-07 03:59:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-07 03:59:31,099 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2019-11-07 03:59:31,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:59:31,100 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-07 03:59:31,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-07 03:59:31,102 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-07 03:59:31,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 03:59:31,103 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:31,104 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:31,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:59:31,316 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:31,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:31,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1007933545, now seen corresponding path program 2 times [2019-11-07 03:59:31,317 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:31,317 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073316676] [2019-11-07 03:59:31,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:31,453 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073316676] [2019-11-07 03:59:31,453 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974071923] [2019-11-07 03:59:31,453 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 [2019-11-07 03:59:31,496 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 03:59:31,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 03:59:31,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-07 03:59:31,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:59:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:31,534 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:59:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:59:31,640 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1491743314] [2019-11-07 03:59:31,641 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-07 03:59:31,641 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:59:31,642 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:59:31,642 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:59:31,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:59:31,653 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-11-07 03:59:31,763 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 57 for LOIs [2019-11-07 03:59:31,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-11-07 03:59:31,776 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:59:31,859 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:59:31,860 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 5] total 17 [2019-11-07 03:59:31,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623871356] [2019-11-07 03:59:31,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 03:59:31,861 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:59:31,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 03:59:31,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2019-11-07 03:59:31,863 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 17 states. [2019-11-07 03:59:31,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:59:31,984 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2019-11-07 03:59:31,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 03:59:31,985 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2019-11-07 03:59:31,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:59:31,985 INFO L225 Difference]: With dead ends: 22 [2019-11-07 03:59:31,986 INFO L226 Difference]: Without dead ends: 17 [2019-11-07 03:59:31,986 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-11-07 03:59:31,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-07 03:59:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-07 03:59:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-07 03:59:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-07 03:59:31,991 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2019-11-07 03:59:31,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:59:31,992 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-07 03:59:31,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 03:59:31,992 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-07 03:59:31,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 03:59:31,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:59:31,993 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:59:32,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:59:32,200 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:59:32,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:59:32,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1779402249, now seen corresponding path program 3 times [2019-11-07 03:59:32,200 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:59:32,200 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911551109] [2019-11-07 03:59:32,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:59:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:59:34,469 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 12 [2019-11-07 03:59:36,478 WARN L838 $PredicateComparison]: unable to prove that (<= (* 536870912 (div (+ (* c_main_~y~0 178956971) 715827879) 536870912)) (+ (* 178956971 c_main_~y~0) 178956968)) is different from false [2019-11-07 03:59:43,045 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 18 [2019-11-07 03:59:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2019-11-07 03:59:49,284 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911551109] [2019-11-07 03:59:49,284 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648030179] [2019-11-07 03:59:49,284 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 [2019-11-07 03:59:49,340 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 03:59:49,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 03:59:49,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-07 03:59:49,343 INFO L279 TraceCheckSpWp]: Computing forward predicates...