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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:04:37,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:04:37,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:04:37,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:04:37,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:04:37,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:04:37,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:04:37,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:04:37,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:04:37,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:04:37,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:04:37,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:04:37,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:04:37,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:04:37,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:04:37,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:04:37,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:04:37,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:04:37,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:04:37,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:04:37,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:04:37,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:04:37,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:04:37,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:04:37,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:04:37,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:04:37,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:04:37,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:04:37,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:04:37,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:04:37,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:04:37,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:04:37,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:04:37,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:04:37,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:04:37,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:04:37,921 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:04:37,944 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:04:37,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:04:37,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:04:37,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:04:37,947 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:04:37,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:04:37,947 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:04:37,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:04:37,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:04:37,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:04:37,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:04:37,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:04:37,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:04:37,949 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:04:37,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:04:37,949 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:04:37,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:04:37,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:04:37,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:04:37,950 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:04:37,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:04:37,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:04:37,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:04:37,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:04:37,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:04:37,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:04:37,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:04:37,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:04:37,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:04:38,214 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:04:38,227 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:04:38,230 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:04:38,231 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:04:38,232 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:04:38,232 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2019-10-15 01:04:38,287 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5fed1ae1/aa3beef9de814554a844d601316ce355/FLAG84310746c [2019-10-15 01:04:38,712 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:04:38,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2019-10-15 01:04:38,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5fed1ae1/aa3beef9de814554a844d601316ce355/FLAG84310746c [2019-10-15 01:04:39,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5fed1ae1/aa3beef9de814554a844d601316ce355 [2019-10-15 01:04:39,133 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:04:39,135 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:04:39,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:04:39,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:04:39,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:04:39,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@144bd336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39, skipping insertion in model container [2019-10-15 01:04:39,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,154 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:04:39,172 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:04:39,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:04:39,381 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:04:39,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:04:39,407 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:04:39,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39 WrapperNode [2019-10-15 01:04:39,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:04:39,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:04:39,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:04:39,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:04:39,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:04:39,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:04:39,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:04:39,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:04:39,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:04:39,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:04:39,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:04:39,584 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:04:39,584 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:04:39,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:04:39,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:04:39,585 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:04:39,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:04:39,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:04:39,741 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:04:39,741 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:04:39,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:04:39 BoogieIcfgContainer [2019-10-15 01:04:39,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:04:39,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:04:39,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:04:39,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:04:39,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:04:39" (1/3) ... [2019-10-15 01:04:39,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf7180c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:04:39, skipping insertion in model container [2019-10-15 01:04:39,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (2/3) ... [2019-10-15 01:04:39,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf7180c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:04:39, skipping insertion in model container [2019-10-15 01:04:39,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:04:39" (3/3) ... [2019-10-15 01:04:39,751 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2019-10-15 01:04:39,759 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:04:39,765 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:04:39,775 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:04:39,798 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:04:39,799 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:04:39,799 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:04:39,799 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:04:39,799 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:04:39,799 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:04:39,800 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:04:39,800 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:04:39,817 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-10-15 01:04:39,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:04:39,823 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:39,824 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:39,825 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:39,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:39,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2019-10-15 01:04:39,840 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:39,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810926645] [2019-10-15 01:04:39,841 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:39,841 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:39,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:40,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810926645] [2019-10-15 01:04:40,046 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:04:40,046 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:04:40,046 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425534711] [2019-10-15 01:04:40,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:04:40,055 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:04:40,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:04:40,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:04:40,082 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-10-15 01:04:40,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:04:40,118 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-10-15 01:04:40,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:04:40,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-15 01:04:40,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:04:40,128 INFO L225 Difference]: With dead ends: 29 [2019-10-15 01:04:40,129 INFO L226 Difference]: Without dead ends: 12 [2019-10-15 01:04:40,132 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:04:40,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-15 01:04:40,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-15 01:04:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-15 01:04:40,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-15 01:04:40,170 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-15 01:04:40,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:04:40,170 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-15 01:04:40,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:04:40,171 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-15 01:04:40,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:04:40,171 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:40,172 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:40,172 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:40,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2019-10-15 01:04:40,173 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:40,173 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897133511] [2019-10-15 01:04:40,173 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:40,173 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:40,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:40,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897133511] [2019-10-15 01:04:40,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113375401] [2019-10-15 01:04:40,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:04:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:40,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:04:40,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:04:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:40,367 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:04:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:40,421 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [866098928] [2019-10-15 01:04:40,429 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 12 [2019-10-15 01:04:40,474 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:04:40,474 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:04:40,533 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-15 01:04:40,818 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:04:40,821 INFO L272 AbstractInterpreter]: Visited 11 different actions 47 times. Merged at 2 different actions 12 times. Widened at 1 different actions 4 times. Performed 89 root evaluator evaluations with a maximum evaluation depth of 12. Performed 89 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2019-10-15 01:04:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:40,827 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:04:40,827 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:04:40,827 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2019-10-15 01:04:40,828 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921675161] [2019-10-15 01:04:40,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:04:40,830 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:04:40,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:04:40,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:04:40,831 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2019-10-15 01:04:40,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:04:40,880 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-10-15 01:04:40,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:04:40,881 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-10-15 01:04:40,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:04:40,882 INFO L225 Difference]: With dead ends: 20 [2019-10-15 01:04:40,882 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 01:04:40,883 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:04:40,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 01:04:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 01:04:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 01:04:40,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-15 01:04:40,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2019-10-15 01:04:40,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:04:40,888 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-15 01:04:40,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:04:40,889 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-15 01:04:40,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:04:40,890 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:40,890 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:41,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:04:41,095 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:41,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 2 times [2019-10-15 01:04:41,096 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:41,096 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784575092] [2019-10-15 01:04:41,096 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:41,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:41,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:41,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784575092] [2019-10-15 01:04:41,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392016281] [2019-10-15 01:04:41,298 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:04:41,367 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:04:41,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:04:41,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:04:41,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:04:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:41,412 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:04:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:41,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1703448605] [2019-10-15 01:04:41,546 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-15 01:04:41,547 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-15 01:04:41,547 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:04:41,548 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2019-10-15 01:04:41,548 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964434821] [2019-10-15 01:04:41,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-15 01:04:41,549 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:04:41,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-15 01:04:41,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:04:41,552 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 13 states. [2019-10-15 01:04:41,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:04:41,624 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2019-10-15 01:04:41,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:04:41,628 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2019-10-15 01:04:41,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:04:41,629 INFO L225 Difference]: With dead ends: 22 [2019-10-15 01:04:41,631 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:04:41,631 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:04:41,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:04:41,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:04:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:04:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-10-15 01:04:41,642 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2019-10-15 01:04:41,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:04:41,643 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-10-15 01:04:41,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-15 01:04:41,643 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-10-15 01:04:41,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:04:41,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:41,644 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:41,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:04:41,855 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:41,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 3 times [2019-10-15 01:04:41,857 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:41,857 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416709553] [2019-10-15 01:04:41,857 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:41,857 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:41,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:46,139 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 [2019-10-15 01:04:48,166 WARN L838 $PredicateComparison]: unable to prove that (<= (* 1073741824 (div (+ (* c_main_~y~0 715827883) 1431655759) 1073741824)) (+ (* 715827883 c_main_~y~0) 357913936)) is different from false [2019-10-15 01:04:50,575 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 18 [2019-10-15 01:04:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 1 times theorem prover too weak. 0 trivial. 11 not checked. [2019-10-15 01:04:52,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416709553] [2019-10-15 01:04:52,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363113067] [2019-10-15 01:04:52,623 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:04:52,666 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:04:52,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:04:52,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-15 01:04:52,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:05:01,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:05:01,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:05:01,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:05:01,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:05:01,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms