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/nla-digbench/bresenham.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:07:26,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:07:26,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:07:26,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:07:26,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:07:26,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:07:26,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:07:26,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:07:26,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:07:26,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:07:26,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:07:26,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:07:26,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:07:26,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:07:26,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:07:26,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:07:26,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:07:26,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:07:26,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:07:26,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:07:26,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:07:26,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:07:26,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:07:26,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:07:26,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:07:26,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:07:26,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:07:26,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:07:26,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:07:26,273 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:07:26,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:07:26,274 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:07:26,274 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:07:26,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:07:26,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:07:26,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:07:26,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:07:26,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:07:26,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:07:26,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:07:26,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:07:26,283 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 [2019-10-13 21:07:26,304 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:07:26,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:07:26,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:07:26,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:07:26,306 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:07:26,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:07:26,307 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:07:26,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:07:26,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:07:26,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:07:26,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:07:26,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:07:26,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:07:26,309 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:07:26,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:07:26,310 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:07:26,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:07:26,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:07:26,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:07:26,310 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:07:26,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:07:26,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:07:26,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:07:26,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:07:26,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:07:26,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:07:26,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:07:26,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:07:26,312 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 [2019-10-13 21:07:26,577 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:07:26,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:07:26,591 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:07:26,593 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:07:26,593 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:07:26,594 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/bresenham.c [2019-10-13 21:07:26,663 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cc864c6c/1a62ba0693484364bb01fdf6994d11e2/FLAG7520f7d92 [2019-10-13 21:07:27,108 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:07:27,109 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/bresenham.c [2019-10-13 21:07:27,115 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cc864c6c/1a62ba0693484364bb01fdf6994d11e2/FLAG7520f7d92 [2019-10-13 21:07:27,506 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cc864c6c/1a62ba0693484364bb01fdf6994d11e2 [2019-10-13 21:07:27,516 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:07:27,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:07:27,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:07:27,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:07:27,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:07:27,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:07:27" (1/1) ... [2019-10-13 21:07:27,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74c645f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:27, skipping insertion in model container [2019-10-13 21:07:27,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:07:27" (1/1) ... [2019-10-13 21:07:27,536 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:07:27,553 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:07:27,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:07:27,764 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:07:27,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:07:27,791 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:07:27,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:27 WrapperNode [2019-10-13 21:07:27,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:07:27,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:07:27,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:07:27,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:07:27,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:27" (1/1) ... [2019-10-13 21:07:27,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:27" (1/1) ... [2019-10-13 21:07:27,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:27" (1/1) ... [2019-10-13 21:07:27,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:27" (1/1) ... [2019-10-13 21:07:27,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:27" (1/1) ... [2019-10-13 21:07:27,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:27" (1/1) ... [2019-10-13 21:07:27,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:27" (1/1) ... [2019-10-13 21:07:27,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:07:27,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:07:27,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:07:27,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:07:27,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:27" (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 [2019-10-13 21:07:27,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:07:27,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:07:27,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 21:07:27,943 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:07:27,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:07:27,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:07:27,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 21:07:27,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 21:07:27,944 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:07:27,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:07:27,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:07:28,133 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:07:28,133 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:07:28,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:07:28 BoogieIcfgContainer [2019-10-13 21:07:28,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:07:28,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:07:28,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:07:28,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:07:28,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:07:27" (1/3) ... [2019-10-13 21:07:28,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565d0432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:07:28, skipping insertion in model container [2019-10-13 21:07:28,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:27" (2/3) ... [2019-10-13 21:07:28,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565d0432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:07:28, skipping insertion in model container [2019-10-13 21:07:28,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:07:28" (3/3) ... [2019-10-13 21:07:28,143 INFO L109 eAbstractionObserver]: Analyzing ICFG bresenham.c [2019-10-13 21:07:28,152 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:07:28,160 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:07:28,181 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:07:28,228 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:07:28,228 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:07:28,228 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:07:28,228 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:07:28,229 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:07:28,229 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:07:28,229 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:07:28,229 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:07:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-13 21:07:28,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 21:07:28,258 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:07:28,259 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:07:28,261 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:07:28,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:07:28,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1560104174, now seen corresponding path program 1 times [2019-10-13 21:07:28,277 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:07:28,278 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701123249] [2019-10-13 21:07:28,278 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:28,278 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:28,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:07:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:07:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:07:28,384 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701123249] [2019-10-13 21:07:28,384 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:07:28,385 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 21:07:28,385 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568426881] [2019-10-13 21:07:28,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:07:28,390 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:07:28,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:07:28,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 21:07:28,403 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-10-13 21:07:28,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:07:28,422 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-10-13 21:07:28,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:07:28,423 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-13 21:07:28,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:07:28,433 INFO L225 Difference]: With dead ends: 39 [2019-10-13 21:07:28,433 INFO L226 Difference]: Without dead ends: 17 [2019-10-13 21:07:28,436 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 21:07:28,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-13 21:07:28,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-13 21:07:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-13 21:07:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-13 21:07:28,474 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2019-10-13 21:07:28,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:07:28,475 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-13 21:07:28,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:07:28,475 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-13 21:07:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 21:07:28,476 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:07:28,476 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:07:28,476 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:07:28,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:07:28,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1561891634, now seen corresponding path program 1 times [2019-10-13 21:07:28,477 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:07:28,478 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618843795] [2019-10-13 21:07:28,478 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:28,478 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:28,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:07:28,487 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:07:28,488 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863184405] [2019-10-13 21:07:28,488 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 [2019-10-13 21:07:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:07:28,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 21:07:28,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:07:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:07:28,607 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:07:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:07:28,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618843795] [2019-10-13 21:07:28,685 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:07:28,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863184405] [2019-10-13 21:07:28,686 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:07:28,686 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-13 21:07:28,686 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562806322] [2019-10-13 21:07:28,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 21:07:28,688 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:07:28,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 21:07:28,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:07:28,689 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2019-10-13 21:07:28,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:07:28,804 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-10-13 21:07:28,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:07:28,804 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-10-13 21:07:28,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:07:28,807 INFO L225 Difference]: With dead ends: 28 [2019-10-13 21:07:28,807 INFO L226 Difference]: Without dead ends: 25 [2019-10-13 21:07:28,809 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:07:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-13 21:07:28,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-13 21:07:28,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 21:07:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-13 21:07:28,827 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2019-10-13 21:07:28,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:07:28,828 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-13 21:07:28,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 21:07:28,829 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-13 21:07:28,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 21:07:28,830 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:07:28,831 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:07:29,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:07:29,035 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:07:29,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:07:29,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1038075816, now seen corresponding path program 1 times [2019-10-13 21:07:29,036 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:07:29,037 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907238482] [2019-10-13 21:07:29,037 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:29,037 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:29,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:07:29,045 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:07:29,045 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293643552] [2019-10-13 21:07:29,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 21:07:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:07:29,079 WARN L254 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 21:07:29,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:07:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:07:29,205 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:07:29,344 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:07:29,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:07:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:07:29,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907238482] [2019-10-13 21:07:29,388 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:07:29,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293643552] [2019-10-13 21:07:29,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1370354612] [2019-10-13 21:07:29,403 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 20 [2019-10-13 21:07:29,451 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 21:07:29,451 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 21:07:29,589 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-13 21:07:29,591 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 14 root evaluator evaluations with a maximum evaluation depth of 10. Performed 14 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Never found a fixpoint. Largest state had 8 variables. [2019-10-13 21:07:29,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:07:29,595 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:07:29,595 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:07:29,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-10-13 21:07:29,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996969006] [2019-10-13 21:07:29,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 21:07:29,597 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:07:29,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 21:07:29,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:07:29,598 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 13 states. [2019-10-13 21:07:29,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:07:29,842 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-10-13 21:07:29,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 21:07:29,843 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2019-10-13 21:07:29,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:07:29,845 INFO L225 Difference]: With dead ends: 37 [2019-10-13 21:07:29,845 INFO L226 Difference]: Without dead ends: 32 [2019-10-13 21:07:29,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:07:29,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-13 21:07:29,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-10-13 21:07:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 21:07:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-10-13 21:07:29,862 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 19 [2019-10-13 21:07:29,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:07:29,863 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-10-13 21:07:29,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 21:07:29,863 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-10-13 21:07:29,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 21:07:29,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:07:29,867 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:07:30,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:07:30,078 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:07:30,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:07:30,078 INFO L82 PathProgramCache]: Analyzing trace with hash 190103611, now seen corresponding path program 1 times [2019-10-13 21:07:30,079 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:07:30,079 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485577400] [2019-10-13 21:07:30,079 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:30,079 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:30,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:07:30,086 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:07:30,086 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061529694] [2019-10-13 21:07:30,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 21:07:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:07:30,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 21:07:30,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:07:30,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:07:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:07:30,277 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:07:30,362 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:07:32,387 WARN L860 $PredicateComparison]: unable to prove that (or (<= c_main_~x~0 c_main_~X~0) (= (+ (* 2 c_main_~y~0) (* (* c_main_~X~0 2) c_main_~y~0)) (* (* c_main_~x~0 2) c_main_~y~0))) is different from true [2019-10-13 21:07:32,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:07:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:07:32,551 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485577400] [2019-10-13 21:07:32,552 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:07:32,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061529694] [2019-10-13 21:07:32,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1646292104] [2019-10-13 21:07:32,552 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 26 [2019-10-13 21:07:32,554 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 21:07:32,554 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 21:07:32,582 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-13 21:07:32,582 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 14 root evaluator evaluations with a maximum evaluation depth of 10. Performed 14 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Never found a fixpoint. Largest state had 9 variables. [2019-10-13 21:07:32,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:07:32,583 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:07:32,583 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:07:32,583 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2019-10-13 21:07:32,583 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14275149] [2019-10-13 21:07:32,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 21:07:32,584 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:07:32,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 21:07:32,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=254, Unknown=1, NotChecked=32, Total=342 [2019-10-13 21:07:32,585 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 19 states. [2019-10-13 21:07:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:07:33,278 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2019-10-13 21:07:33,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 21:07:33,279 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2019-10-13 21:07:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:07:33,280 INFO L225 Difference]: With dead ends: 38 [2019-10-13 21:07:33,280 INFO L226 Difference]: Without dead ends: 0 [2019-10-13 21:07:33,281 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=120, Invalid=533, Unknown=1, NotChecked=48, Total=702 [2019-10-13 21:07:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-13 21:07:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-13 21:07:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-13 21:07:33,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-13 21:07:33,282 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2019-10-13 21:07:33,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:07:33,283 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-13 21:07:33,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 21:07:33,283 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-13 21:07:33,283 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-13 21:07:33,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:07:33,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-13 21:07:37,964 WARN L191 SmtUtils]: Spent 4.37 s on a formula simplification. DAG size of input: 49 DAG size of output: 22 [2019-10-13 21:07:41,373 WARN L191 SmtUtils]: Spent 3.40 s on a formula simplification. DAG size of input: 49 DAG size of output: 22 [2019-10-13 21:07:41,376 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-13 21:07:41,376 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-13 21:07:41,376 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-13 21:07:41,376 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-13 21:07:41,376 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-13 21:07:41,376 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-13 21:07:41,376 INFO L443 ceAbstractionStarter]: For program point L31(lines 31 36) no Hoare annotation was computed. [2019-10-13 21:07:41,376 INFO L443 ceAbstractionStarter]: For program point L31-2(lines 31 36) no Hoare annotation was computed. [2019-10-13 21:07:41,377 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 16 42) no Hoare annotation was computed. [2019-10-13 21:07:41,377 INFO L439 ceAbstractionStarter]: At program point L25-2(lines 25 38) the Hoare annotation is: (let ((.cse0 (* (* main_~X~0 2) main_~y~0))) (and (= (+ (* 2 main_~Y~0) (* (* main_~Y~0 2) main_~x~0)) (+ main_~v~0 main_~X~0 .cse0)) (or (<= main_~x~0 main_~X~0) (= (+ (* 2 main_~y~0) .cse0) (* (* main_~x~0 2) main_~y~0))))) [2019-10-13 21:07:41,377 INFO L439 ceAbstractionStarter]: At program point L25-3(lines 25 38) the Hoare annotation is: (let ((.cse0 (* 2 main_~Y~0)) (.cse1 (* (* main_~Y~0 2) main_~x~0))) (and (= (+ .cse0 .cse1) (+ main_~v~0 main_~X~0 (* (* main_~X~0 2) main_~y~0))) (= (+ .cse0 (* 2 main_~y~0) .cse1) (+ main_~v~0 main_~X~0 (* (* main_~x~0 2) main_~y~0))))) [2019-10-13 21:07:41,377 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 16 42) no Hoare annotation was computed. [2019-10-13 21:07:41,378 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 16 42) the Hoare annotation is: true [2019-10-13 21:07:41,378 INFO L439 ceAbstractionStarter]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* (* main_~X~0 2) main_~y~0))) (and (= (+ (* 2 main_~Y~0) (* (* main_~Y~0 2) main_~x~0)) (+ main_~v~0 main_~X~0 .cse0)) (or (<= main_~x~0 main_~X~0) (= (+ (* 2 main_~y~0) .cse0) (* (* main_~x~0 2) main_~y~0))))) [2019-10-13 21:07:41,378 INFO L443 ceAbstractionStarter]: For program point L26-1(lines 25 38) no Hoare annotation was computed. [2019-10-13 21:07:41,378 INFO L443 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-10-13 21:07:41,378 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 8 14) the Hoare annotation is: true [2019-10-13 21:07:41,379 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2019-10-13 21:07:41,379 INFO L443 ceAbstractionStarter]: For program point L10(lines 10 11) no Hoare annotation was computed. [2019-10-13 21:07:41,379 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 8 14) no Hoare annotation was computed. [2019-10-13 21:07:41,379 INFO L443 ceAbstractionStarter]: For program point L9(lines 9 12) no Hoare annotation was computed. [2019-10-13 21:07:41,379 INFO L443 ceAbstractionStarter]: For program point L9-2(lines 8 14) no Hoare annotation was computed. [2019-10-13 21:07:41,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 09:07:41 BoogieIcfgContainer [2019-10-13 21:07:41,391 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 21:07:41,393 INFO L168 Benchmark]: Toolchain (without parser) took 13875.13 ms. Allocated memory was 139.5 MB in the beginning and 242.7 MB in the end (delta: 103.3 MB). Free memory was 103.4 MB in the beginning and 174.0 MB in the end (delta: -70.7 MB). Peak memory consumption was 32.6 MB. Max. memory is 7.1 GB. [2019-10-13 21:07:41,394 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-10-13 21:07:41,395 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.42 ms. Allocated memory is still 139.5 MB. Free memory was 103.0 MB in the beginning and 93.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-10-13 21:07:41,396 INFO L168 Benchmark]: Boogie Preprocessor took 102.21 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.5 MB in the beginning and 181.7 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2019-10-13 21:07:41,396 INFO L168 Benchmark]: RCFGBuilder took 240.63 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 169.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2019-10-13 21:07:41,397 INFO L168 Benchmark]: TraceAbstraction took 13254.59 ms. Allocated memory was 202.9 MB in the beginning and 242.7 MB in the end (delta: 39.8 MB). Free memory was 169.5 MB in the beginning and 174.0 MB in the end (delta: -4.5 MB). Peak memory consumption was 35.3 MB. Max. memory is 7.1 GB. [2019-10-13 21:07:41,401 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 139.5 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.42 ms. Allocated memory is still 139.5 MB. Free memory was 103.0 MB in the beginning and 93.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 102.21 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.5 MB in the beginning and 181.7 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 240.63 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 169.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13254.59 ms. Allocated memory was 202.9 MB in the beginning and 242.7 MB in the end (delta: 39.8 MB). Free memory was 169.5 MB in the beginning and 174.0 MB in the end (delta: -4.5 MB). Peak memory consumption was 35.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 11]: 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: 25]: Loop Invariant Derived loop invariant: 2 * Y + Y * 2 * x == v + X + X * 2 * y && (x <= X || 2 * y + X * 2 * y == x * 2 * y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Result: SAFE, OverallTime: 13.1s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 7.8s, HoareTripleCheckerStatistics: 63 SDtfs, 57 SDslu, 245 SDs, 0 SdLazy, 330 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 122 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=3, 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, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 17 PreInvPairs, 29 NumberOfFragments, 121 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 268 FormulaSimplificationTreeSizeReductionInter, 7.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 111 ConstructedInterpolants, 0 QuantifiedInterpolants, 13323 SizeOfPredicates, 11 NumberOfNonLiveVariables, 146 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 20/30 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...