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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/nla-digbench/prod4br.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-03 02:36:03,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-03 02:36:03,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-03 02:36:03,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-03 02:36:03,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-03 02:36:03,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-03 02:36:03,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-03 02:36:03,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-03 02:36:03,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-03 02:36:03,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-03 02:36:03,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-03 02:36:03,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-03 02:36:03,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-03 02:36:03,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-03 02:36:03,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-03 02:36:03,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-03 02:36:03,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-03 02:36:03,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-03 02:36:03,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-03 02:36:03,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-03 02:36:03,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-03 02:36:03,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-03 02:36:03,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-03 02:36:03,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-03 02:36:03,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-03 02:36:03,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-03 02:36:03,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-03 02:36:03,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-03 02:36:03,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-03 02:36:03,306 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-03 02:36:03,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-03 02:36:03,307 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-03 02:36:03,309 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-03 02:36:03,310 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-03 02:36:03,310 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-03 02:36:03,310 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-03 02:36:03,310 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-03 02:36:03,310 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-03 02:36:03,311 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-03 02:36:03,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-03 02:36:03,311 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-03 02:36:03,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-03 02:36:03,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-03 02:36:03,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-03 02:36:03,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-03 02:36:03,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-03 02:36:03,314 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-03 02:36:03,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-03 02:36:03,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-03 02:36:03,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-03 02:36:03,315 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-03 02:36:03,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-03 02:36:03,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-03 02:36:03,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-03 02:36:03,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-03 02:36:03,316 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-03 02:36:03,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-03 02:36:03,316 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-03 02:36:03,316 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-03 02:36:03,358 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-03 02:36:03,370 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-03 02:36:03,374 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-03 02:36:03,375 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-03 02:36:03,375 INFO L275 PluginConnector]: CDTParser initialized [2019-10-03 02:36:03,376 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prod4br.c [2019-10-03 02:36:03,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2470bfa9/0db6837ce4e748d39102db6acf33b8a7/FLAGfb3eae5d6 [2019-10-03 02:36:03,848 INFO L306 CDTParser]: Found 1 translation units. [2019-10-03 02:36:03,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prod4br.c [2019-10-03 02:36:03,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2470bfa9/0db6837ce4e748d39102db6acf33b8a7/FLAGfb3eae5d6 [2019-10-03 02:36:04,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2470bfa9/0db6837ce4e748d39102db6acf33b8a7 [2019-10-03 02:36:04,260 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-03 02:36:04,261 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-03 02:36:04,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-03 02:36:04,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-03 02:36:04,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-03 02:36:04,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:36:04" (1/1) ... [2019-10-03 02:36:04,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57bd23e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:36:04, skipping insertion in model container [2019-10-03 02:36:04,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:36:04" (1/1) ... [2019-10-03 02:36:04,278 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-03 02:36:04,301 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-03 02:36:04,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:36:04,496 INFO L188 MainTranslator]: Completed pre-run [2019-10-03 02:36:04,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:36:04,535 INFO L192 MainTranslator]: Completed translation [2019-10-03 02:36:04,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:36:04 WrapperNode [2019-10-03 02:36:04,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-03 02:36:04,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-03 02:36:04,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-03 02:36:04,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-03 02:36:04,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:36:04" (1/1) ... [2019-10-03 02:36:04,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:36:04" (1/1) ... [2019-10-03 02:36:04,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:36:04" (1/1) ... [2019-10-03 02:36:04,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:36:04" (1/1) ... [2019-10-03 02:36:04,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:36:04" (1/1) ... [2019-10-03 02:36:04,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:36:04" (1/1) ... [2019-10-03 02:36:04,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:36:04" (1/1) ... [2019-10-03 02:36:04,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-03 02:36:04,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-03 02:36:04,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-03 02:36:04,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-03 02:36:04,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:36:04" (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 [2019-10-03 02:36:04,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-03 02:36:04,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-03 02:36:04,719 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-03 02:36:04,719 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-03 02:36:04,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-03 02:36:04,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-03 02:36:04,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-03 02:36:04,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-03 02:36:04,720 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-03 02:36:04,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-03 02:36:04,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-03 02:36:04,914 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-03 02:36:04,914 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-03 02:36:04,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:36:04 BoogieIcfgContainer [2019-10-03 02:36:04,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-03 02:36:04,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-03 02:36:04,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-03 02:36:04,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-03 02:36:04,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 02:36:04" (1/3) ... [2019-10-03 02:36:04,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669bed0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:36:04, skipping insertion in model container [2019-10-03 02:36:04,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:36:04" (2/3) ... [2019-10-03 02:36:04,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669bed0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:36:04, skipping insertion in model container [2019-10-03 02:36:04,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:36:04" (3/3) ... [2019-10-03 02:36:04,923 INFO L109 eAbstractionObserver]: Analyzing ICFG prod4br.c [2019-10-03 02:36:04,932 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-03 02:36:04,940 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-03 02:36:04,957 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-03 02:36:05,000 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-03 02:36:05,000 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-03 02:36:05,001 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-03 02:36:05,001 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-03 02:36:05,001 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-03 02:36:05,001 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-03 02:36:05,001 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-03 02:36:05,001 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-03 02:36:05,026 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-03 02:36:05,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-03 02:36:05,042 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:36:05,046 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:36:05,052 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:36:05,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:36:05,060 INFO L82 PathProgramCache]: Analyzing trace with hash 152624894, now seen corresponding path program 1 times [2019-10-03 02:36:05,063 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:36:05,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:36:05,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:05,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:36:05,123 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:36:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:36:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:36:05,180 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:36:05,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-03 02:36:05,181 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:36:05,184 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-03 02:36:05,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-03 02:36:05,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-03 02:36:05,197 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2019-10-03 02:36:05,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:36:05,212 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2019-10-03 02:36:05,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-03 02:36:05,213 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-03 02:36:05,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:36:05,221 INFO L225 Difference]: With dead ends: 24 [2019-10-03 02:36:05,221 INFO L226 Difference]: Without dead ends: 19 [2019-10-03 02:36:05,222 INFO L640 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 [2019-10-03 02:36:05,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-03 02:36:05,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-03 02:36:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-03 02:36:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-10-03 02:36:05,258 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2019-10-03 02:36:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:36:05,258 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-10-03 02:36:05,258 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-03 02:36:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-10-03 02:36:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-03 02:36:05,260 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:36:05,260 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:36:05,260 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:36:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:36:05,261 INFO L82 PathProgramCache]: Analyzing trace with hash 130400808, now seen corresponding path program 1 times [2019-10-03 02:36:05,261 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:36:05,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:36:05,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:05,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:36:05,263 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:36:05,270 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:36:05,271 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:36:05,271 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 [2019-10-03 02:36:05,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:05,294 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:36:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:36:05,313 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-10-03 02:36:05,314 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-03 02:36:05,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:36:05,315 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:36:05,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:05,331 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-03 02:36:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:36:05,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-03 02:36:05,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:36:05,426 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:36:05,460 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:36:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-10-03 02:36:05,532 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:36:05,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-03 02:36:05,532 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:36:05,533 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-03 02:36:05,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-03 02:36:05,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-03 02:36:05,534 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2019-10-03 02:36:05,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:36:05,665 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2019-10-03 02:36:05,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-03 02:36:05,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-03 02:36:05,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:36:05,667 INFO L225 Difference]: With dead ends: 31 [2019-10-03 02:36:05,668 INFO L226 Difference]: Without dead ends: 31 [2019-10-03 02:36:05,669 INFO L640 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 [2019-10-03 02:36:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-03 02:36:05,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2019-10-03 02:36:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-03 02:36:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2019-10-03 02:36:05,678 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 10 [2019-10-03 02:36:05,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:36:05,678 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2019-10-03 02:36:05,678 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-03 02:36:05,678 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2019-10-03 02:36:05,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-03 02:36:05,679 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:36:05,680 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:36:05,680 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:36:05,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:36:05,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1836845457, now seen corresponding path program 1 times [2019-10-03 02:36:05,680 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:36:05,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:36:05,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:05,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:36:05,683 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:36:05,691 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:36:05,691 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:36:05,691 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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) [2019-10-03 02:36:05,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:05,718 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:36:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:36:05,732 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2019-10-03 02:36:05,734 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [43], [46], [48], [51], [53], [54], [55], [56], [58], [59], [60] [2019-10-03 02:36:05,769 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:36:05,770 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:36:05,939 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:36:05,940 INFO L272 AbstractInterpreter]: Visited 15 different actions 20 times. Never merged. Never widened. Performed 27 root evaluator evaluations with a maximum evaluation depth of 8. Performed 27 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Never found a fixpoint. Largest state had 8 variables. [2019-10-03 02:36:05,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:36:05,944 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:36:05,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:36:05,944 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:36:05,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:05,978 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-03 02:36:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:36:05,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-03 02:36:06,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:36:06,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:06,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:36:06,143 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:36:06,259 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:06,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:06,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:06,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:06,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:36:06,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-03 02:36:06,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-10-03 02:36:06,310 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:36:06,311 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-03 02:36:06,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-03 02:36:06,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-10-03 02:36:06,312 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 13 states. [2019-10-03 02:36:07,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:36:07,320 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2019-10-03 02:36:07,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-03 02:36:07,320 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-10-03 02:36:07,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:36:07,323 INFO L225 Difference]: With dead ends: 39 [2019-10-03 02:36:07,323 INFO L226 Difference]: Without dead ends: 39 [2019-10-03 02:36:07,324 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2019-10-03 02:36:07,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-03 02:36:07,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2019-10-03 02:36:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-03 02:36:07,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-03 02:36:07,331 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2019-10-03 02:36:07,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:36:07,331 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-03 02:36:07,331 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-03 02:36:07,331 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-03 02:36:07,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-03 02:36:07,332 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:36:07,332 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:36:07,333 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:36:07,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:36:07,333 INFO L82 PathProgramCache]: Analyzing trace with hash 682822634, now seen corresponding path program 1 times [2019-10-03 02:36:07,333 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:36:07,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:36:07,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:07,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:36:07,335 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:36:07,339 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:36:07,339 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:36:07,340 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-03 02:36:07,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:07,360 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:36:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:36:07,374 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2019-10-03 02:36:07,374 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [22], [43], [46], [48], [51], [53], [54], [55], [56], [58], [59] [2019-10-03 02:36:07,376 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:36:07,376 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:36:07,406 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-03 02:36:07,691 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:36:07,699 INFO L272 AbstractInterpreter]: Visited 15 different actions 75 times. Merged at 4 different actions 24 times. Widened at 1 different actions 2 times. Performed 136 root evaluator evaluations with a maximum evaluation depth of 9. Performed 136 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2019-10-03 02:36:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:36:07,700 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:36:07,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:36:07,700 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-03 02:36:07,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:07,723 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:36:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:36:07,742 WARN L254 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-03 02:36:07,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:36:07,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:36:07,921 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:36:07,952 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:07,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:07,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:08,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:08,095 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:36:08,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-03 02:36:08,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-10-03 02:36:08,134 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:36:08,135 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-03 02:36:08,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-03 02:36:08,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-03 02:36:08,135 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 13 states. [2019-10-03 02:36:08,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:36:08,500 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2019-10-03 02:36:08,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-03 02:36:08,501 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-10-03 02:36:08,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:36:08,503 INFO L225 Difference]: With dead ends: 49 [2019-10-03 02:36:08,504 INFO L226 Difference]: Without dead ends: 49 [2019-10-03 02:36:08,504 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-10-03 02:36:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-03 02:36:08,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2019-10-03 02:36:08,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-03 02:36:08,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-10-03 02:36:08,512 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 18 [2019-10-03 02:36:08,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:36:08,512 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-10-03 02:36:08,512 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-03 02:36:08,512 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-10-03 02:36:08,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-03 02:36:08,513 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:36:08,513 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:36:08,514 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:36:08,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:36:08,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1827366173, now seen corresponding path program 1 times [2019-10-03 02:36:08,514 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:36:08,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:36:08,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:08,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:36:08,516 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:36:08,520 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:36:08,520 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:36:08,520 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:36:08,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:08,540 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:36:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:36:08,555 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2019-10-03 02:36:08,555 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [24], [27], [43], [46], [48], [51], [53], [54], [55], [56], [58], [59] [2019-10-03 02:36:08,558 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:36:08,559 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:36:08,573 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-03 02:36:08,787 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:36:08,788 INFO L272 AbstractInterpreter]: Visited 16 different actions 71 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Performed 110 root evaluator evaluations with a maximum evaluation depth of 12. Performed 110 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2019-10-03 02:36:08,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:36:08,788 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:36:08,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:36:08,789 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-03 02:36:08,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:08,819 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:36:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:36:08,836 WARN L254 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-03 02:36:08,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:36:09,493 WARN L191 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2019-10-03 02:36:09,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:36:09,542 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:36:09,712 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2019-10-03 02:36:09,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:09,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:36:09,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-03 02:36:09,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-10-03 02:36:09,773 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:36:09,774 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-03 02:36:09,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-03 02:36:09,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-03 02:36:09,774 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 13 states. [2019-10-03 02:36:10,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:36:10,136 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2019-10-03 02:36:10,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-03 02:36:10,136 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2019-10-03 02:36:10,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:36:10,138 INFO L225 Difference]: With dead ends: 55 [2019-10-03 02:36:10,138 INFO L226 Difference]: Without dead ends: 53 [2019-10-03 02:36:10,138 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-10-03 02:36:10,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-03 02:36:10,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 25. [2019-10-03 02:36:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-03 02:36:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-03 02:36:10,144 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2019-10-03 02:36:10,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:36:10,144 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-03 02:36:10,144 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-03 02:36:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-03 02:36:10,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-03 02:36:10,145 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:36:10,145 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:36:10,145 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:36:10,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:36:10,146 INFO L82 PathProgramCache]: Analyzing trace with hash 560958013, now seen corresponding path program 1 times [2019-10-03 02:36:10,146 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:36:10,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:36:10,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:10,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:36:10,148 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:36:10,152 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:36:10,152 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:36:10,152 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:36:10,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:10,172 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:36:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:36:10,181 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2019-10-03 02:36:10,181 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [43], [46], [48], [51], [53], [54], [55], [56], [58], [59], [60], [61], [62] [2019-10-03 02:36:10,183 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:36:10,183 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:36:10,198 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:36:10,198 INFO L272 AbstractInterpreter]: Visited 17 different actions 27 times. Never merged. Never widened. Performed 35 root evaluator evaluations with a maximum evaluation depth of 8. Performed 35 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Never found a fixpoint. Largest state had 8 variables. [2019-10-03 02:36:10,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:36:10,199 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:36:10,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:36:10,199 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:36:10,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:10,226 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-03 02:36:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:36:10,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-03 02:36:10,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:36:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-03 02:36:10,266 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:36:10,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-10-03 02:36:10,301 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:36:10,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2019-10-03 02:36:10,302 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:36:10,302 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-03 02:36:10,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-03 02:36:10,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-03 02:36:10,303 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-10-03 02:36:10,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:36:10,376 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2019-10-03 02:36:10,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-03 02:36:10,376 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-10-03 02:36:10,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:36:10,377 INFO L225 Difference]: With dead ends: 35 [2019-10-03 02:36:10,377 INFO L226 Difference]: Without dead ends: 31 [2019-10-03 02:36:10,378 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-03 02:36:10,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-03 02:36:10,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-10-03 02:36:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-03 02:36:10,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-10-03 02:36:10,385 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 21 [2019-10-03 02:36:10,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:36:10,386 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-10-03 02:36:10,386 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-03 02:36:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-10-03 02:36:10,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-03 02:36:10,387 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:36:10,387 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:36:10,390 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:36:10,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:36:10,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1615173920, now seen corresponding path program 1 times [2019-10-03 02:36:10,390 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:36:10,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:36:10,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:10,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:36:10,394 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:36:10,400 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:36:10,400 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:36:10,400 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:36:10,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:10,423 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:36:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:36:10,435 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2019-10-03 02:36:10,436 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [19], [24], [29], [32], [43], [46], [48], [51], [53], [54], [55], [56], [58], [59], [60], [61], [62] [2019-10-03 02:36:10,437 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:36:10,437 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:36:10,449 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-03 02:36:11,153 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:36:11,153 INFO L272 AbstractInterpreter]: Visited 21 different actions 161 times. Merged at 8 different actions 40 times. Widened at 1 different actions 1 times. Performed 209 root evaluator evaluations with a maximum evaluation depth of 12. Performed 209 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2019-10-03 02:36:11,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:36:11,154 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:36:11,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:36:11,154 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-03 02:36:11,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:11,181 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:36:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:36:11,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-03 02:36:11,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:36:11,268 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-03 02:36:11,268 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:36:11,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-03 02:36:11,308 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:36:11,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2019-10-03 02:36:11,309 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:36:11,309 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-03 02:36:11,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-03 02:36:11,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-03 02:36:11,310 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 6 states. [2019-10-03 02:36:11,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:36:11,375 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2019-10-03 02:36:11,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-03 02:36:11,375 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-10-03 02:36:11,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:36:11,376 INFO L225 Difference]: With dead ends: 40 [2019-10-03 02:36:11,377 INFO L226 Difference]: Without dead ends: 36 [2019-10-03 02:36:11,377 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-03 02:36:11,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-03 02:36:11,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-10-03 02:36:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-03 02:36:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-10-03 02:36:11,381 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 31 [2019-10-03 02:36:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:36:11,382 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-10-03 02:36:11,382 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-03 02:36:11,382 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-10-03 02:36:11,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-03 02:36:11,383 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:36:11,383 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:36:11,384 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:36:11,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:36:11,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1091445474, now seen corresponding path program 1 times [2019-10-03 02:36:11,384 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:36:11,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:36:11,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:11,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:36:11,386 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:36:11,390 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:36:11,390 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:36:11,390 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:36:11,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:11,419 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:36:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:36:11,430 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2019-10-03 02:36:11,431 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [19], [24], [29], [34], [43], [46], [48], [51], [53], [54], [55], [56], [58], [59], [60], [61], [62] [2019-10-03 02:36:11,433 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:36:11,433 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:36:11,443 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-03 02:36:12,046 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:36:12,047 INFO L272 AbstractInterpreter]: Visited 21 different actions 161 times. Merged at 8 different actions 40 times. Widened at 1 different actions 1 times. Performed 246 root evaluator evaluations with a maximum evaluation depth of 12. Performed 246 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2019-10-03 02:36:12,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:36:12,047 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:36:12,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:36:12,048 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:36:12,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:36:12,073 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-03 02:36:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:36:12,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-03 02:36:12,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:36:12,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-03 02:36:12,136 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:36:12,167 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:36:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-03 02:36:12,187 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-03 02:36:12,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2019-10-03 02:36:12,188 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:36:12,188 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-03 02:36:12,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-03 02:36:12,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-03 02:36:12,189 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 5 states. [2019-10-03 02:36:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:36:12,300 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2019-10-03 02:36:12,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-03 02:36:12,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-10-03 02:36:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:36:12,301 INFO L225 Difference]: With dead ends: 31 [2019-10-03 02:36:12,301 INFO L226 Difference]: Without dead ends: 0 [2019-10-03 02:36:12,302 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-03 02:36:12,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-03 02:36:12,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-03 02:36:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-03 02:36:12,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-03 02:36:12,305 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2019-10-03 02:36:12,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:36:12,305 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-03 02:36:12,305 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-03 02:36:12,305 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-03 02:36:12,305 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-03 02:36:12,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 02:36:12 BoogieIcfgContainer [2019-10-03 02:36:12,317 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-03 02:36:12,319 INFO L168 Benchmark]: Toolchain (without parser) took 8058.13 ms. Allocated memory was 138.9 MB in the beginning and 363.9 MB in the end (delta: 224.9 MB). Free memory was 86.2 MB in the beginning and 140.3 MB in the end (delta: -54.1 MB). Peak memory consumption was 170.8 MB. Max. memory is 7.1 GB. [2019-10-03 02:36:12,320 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 104.9 MB in the beginning and 104.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-03 02:36:12,321 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.19 ms. Allocated memory is still 138.9 MB. Free memory was 86.0 MB in the beginning and 76.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2019-10-03 02:36:12,322 INFO L168 Benchmark]: Boogie Preprocessor took 130.76 ms. Allocated memory was 138.9 MB in the beginning and 199.2 MB in the end (delta: 60.3 MB). Free memory was 76.0 MB in the beginning and 176.6 MB in the end (delta: -100.6 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2019-10-03 02:36:12,324 INFO L168 Benchmark]: RCFGBuilder took 247.90 ms. Allocated memory is still 199.2 MB. Free memory was 176.6 MB in the beginning and 162.7 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2019-10-03 02:36:12,325 INFO L168 Benchmark]: TraceAbstraction took 7400.87 ms. Allocated memory was 199.2 MB in the beginning and 363.9 MB in the end (delta: 164.6 MB). Free memory was 162.7 MB in the beginning and 140.3 MB in the end (delta: 22.4 MB). Peak memory consumption was 187.0 MB. Max. memory is 7.1 GB. [2019-10-03 02:36:12,333 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 104.9 MB in the beginning and 104.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 274.19 ms. Allocated memory is still 138.9 MB. Free memory was 86.0 MB in the beginning and 76.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.76 ms. Allocated memory was 138.9 MB in the beginning and 199.2 MB in the end (delta: 60.3 MB). Free memory was 76.0 MB in the beginning and 176.6 MB in the end (delta: -100.6 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 247.90 ms. Allocated memory is still 199.2 MB. Free memory was 176.6 MB in the beginning and 162.7 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7400.87 ms. Allocated memory was 199.2 MB in the beginning and 363.9 MB in the end (delta: 164.6 MB). Free memory was 162.7 MB in the beginning and 140.3 MB in the end (delta: 22.4 MB). Peak memory consumption was 187.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 7.3s OverallTime, 8 OverallIterations, 4 TraceHistogramMax, 2.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 151 SDtfs, 121 SDslu, 464 SDs, 0 SdLazy, 578 SolverSat, 56 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 298 GetRequests, 220 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 2.1s AbstIntTime, 6 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 55 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 302 NumberOfCodeBlocks, 302 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 287 ConstructedInterpolants, 3 QuantifiedInterpolants, 22593 SizeOfPredicates, 33 NumberOfNonLiveVariables, 412 ConjunctsInSsa, 119 ConjunctsInUnsatCore, 15 InterpolantComputations, 8 PerfectInterpolantSequences, 107/120 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...