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/ps4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 21:15:05,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 21:15:05,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 21:15:05,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 21:15:05,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 21:15:05,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 21:15:05,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 21:15:05,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 21:15:05,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 21:15:05,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 21:15:05,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 21:15:05,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 21:15:05,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 21:15:05,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 21:15:05,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 21:15:05,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 21:15:05,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 21:15:05,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 21:15:05,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 21:15:05,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 21:15:05,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 21:15:05,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 21:15:05,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 21:15:05,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 21:15:05,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 21:15:05,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 21:15:05,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 21:15:05,315 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 21:15:05,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 21:15:05,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 21:15:05,320 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 21:15:05,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 21:15:05,321 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 21:15:05,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 21:15:05,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 21:15:05,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 21:15:05,324 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 [2019-09-03 21:15:05,347 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 21:15:05,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 21:15:05,348 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 21:15:05,348 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 21:15:05,349 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 21:15:05,349 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 21:15:05,349 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 21:15:05,349 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 21:15:05,349 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 21:15:05,350 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 21:15:05,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 21:15:05,352 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 21:15:05,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 21:15:05,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 21:15:05,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 21:15:05,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 21:15:05,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 21:15:05,353 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 21:15:05,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 21:15:05,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 21:15:05,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 21:15:05,354 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 21:15:05,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 21:15:05,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 21:15:05,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 21:15:05,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 21:15:05,355 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 21:15:05,355 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 21:15:05,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 21:15:05,355 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 21:15:05,405 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 21:15:05,417 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 21:15:05,420 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 21:15:05,421 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 21:15:05,422 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 21:15:05,422 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps4.c [2019-09-03 21:15:05,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1981b1008/a885af36b4014b77ae0ae593d5df77d0/FLAG5bc4161a0 [2019-09-03 21:15:05,909 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 21:15:05,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps4.c [2019-09-03 21:15:05,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1981b1008/a885af36b4014b77ae0ae593d5df77d0/FLAG5bc4161a0 [2019-09-03 21:15:06,298 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1981b1008/a885af36b4014b77ae0ae593d5df77d0 [2019-09-03 21:15:06,306 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 21:15:06,307 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 21:15:06,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 21:15:06,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 21:15:06,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 21:15:06,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:15:06" (1/1) ... [2019-09-03 21:15:06,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@720701ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:06, skipping insertion in model container [2019-09-03 21:15:06,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:15:06" (1/1) ... [2019-09-03 21:15:06,323 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 21:15:06,339 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 21:15:06,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:15:06,509 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 21:15:06,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:15:06,537 INFO L192 MainTranslator]: Completed translation [2019-09-03 21:15:06,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:06 WrapperNode [2019-09-03 21:15:06,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 21:15:06,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 21:15:06,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 21:15:06,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 21:15:06,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:06" (1/1) ... [2019-09-03 21:15:06,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:06" (1/1) ... [2019-09-03 21:15:06,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:06" (1/1) ... [2019-09-03 21:15:06,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:06" (1/1) ... [2019-09-03 21:15:06,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:06" (1/1) ... [2019-09-03 21:15:06,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:06" (1/1) ... [2019-09-03 21:15:06,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:06" (1/1) ... [2019-09-03 21:15:06,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 21:15:06,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 21:15:06,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 21:15:06,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 21:15:06,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:06" (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 [2019-09-03 21:15:06,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 21:15:06,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 21:15:06,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 21:15:06,706 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 21:15:06,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 21:15:06,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 21:15:06,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 21:15:06,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 21:15:06,706 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 21:15:06,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 21:15:06,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 21:15:06,860 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 21:15:06,860 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 21:15:06,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:15:06 BoogieIcfgContainer [2019-09-03 21:15:06,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 21:15:06,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 21:15:06,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 21:15:06,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 21:15:06,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 09:15:06" (1/3) ... [2019-09-03 21:15:06,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bbeb13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 09:15:06, skipping insertion in model container [2019-09-03 21:15:06,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:06" (2/3) ... [2019-09-03 21:15:06,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bbeb13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 09:15:06, skipping insertion in model container [2019-09-03 21:15:06,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:15:06" (3/3) ... [2019-09-03 21:15:06,875 INFO L109 eAbstractionObserver]: Analyzing ICFG ps4.c [2019-09-03 21:15:06,888 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 21:15:06,919 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 21:15:06,959 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 21:15:06,998 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 21:15:06,999 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 21:15:06,999 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 21:15:06,999 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 21:15:06,999 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 21:15:06,999 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 21:15:06,999 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 21:15:06,999 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 21:15:07,012 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-03 21:15:07,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 21:15:07,019 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:15:07,020 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:15:07,022 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:15:07,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:15:07,026 INFO L82 PathProgramCache]: Analyzing trace with hash -148746498, now seen corresponding path program 1 times [2019-09-03 21:15:07,028 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:15:07,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:07,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:07,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:07,065 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:15:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:15:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:15:07,119 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:15:07,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 21:15:07,120 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:15:07,123 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 21:15:07,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 21:15:07,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 21:15:07,136 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-09-03 21:15:07,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:15:07,154 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-09-03 21:15:07,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 21:15:07,155 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 21:15:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:15:07,163 INFO L225 Difference]: With dead ends: 21 [2019-09-03 21:15:07,163 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 21:15:07,165 INFO L628 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 [2019-09-03 21:15:07,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 21:15:07,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 21:15:07,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 21:15:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-03 21:15:07,204 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-09-03 21:15:07,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:15:07,205 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-03 21:15:07,205 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 21:15:07,205 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-03 21:15:07,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 21:15:07,206 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:15:07,207 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:15:07,207 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:15:07,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:15:07,208 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-09-03 21:15:07,208 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:15:07,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:07,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:07,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:07,209 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:15:07,215 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:15:07,215 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:15:07,215 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 [2019-09-03 21:15:07,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:07,234 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:15:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:15:07,247 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-03 21:15:07,248 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 21:15:07,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:15:07,248 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) [2019-09-03 21:15:07,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:07,265 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:15:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:15:07,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-03 21:15:07,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:15:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:15:07,386 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:15:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:15:07,493 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:15:07,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-03 21:15:07,494 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:15:07,495 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 21:15:07,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 21:15:07,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-03 21:15:07,496 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-09-03 21:15:07,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:15:07,558 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-09-03 21:15:07,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 21:15:07,559 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 21:15:07,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:15:07,560 INFO L225 Difference]: With dead ends: 25 [2019-09-03 21:15:07,560 INFO L226 Difference]: Without dead ends: 23 [2019-09-03 21:15:07,562 INFO L628 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 [2019-09-03 21:15:07,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-03 21:15:07,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-03 21:15:07,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-03 21:15:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-03 21:15:07,570 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-09-03 21:15:07,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:15:07,571 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-03 21:15:07,571 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 21:15:07,571 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-03 21:15:07,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-03 21:15:07,572 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:15:07,572 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:15:07,573 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:15:07,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:15:07,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1425845280, now seen corresponding path program 1 times [2019-09-03 21:15:07,574 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:15:07,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:07,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:07,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:07,575 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:15:07,580 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:15:07,580 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:15:07,580 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:15:07,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:07,597 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:15:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:15:07,611 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2019-09-03 21:15:07,613 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [27], [30], [32], [35], [37], [38], [39], [40], [42], [43] [2019-09-03 21:15:07,656 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:15:07,657 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:15:07,811 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:15:07,812 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 12 root evaluator evaluations with a maximum evaluation depth of 12. Performed 12 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Never found a fixpoint. Largest state had 5 variables. [2019-09-03 21:15:07,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:15:07,816 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:15:07,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:15:07,816 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 [2019-09-03 21:15:07,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:07,834 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:15:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:15:07,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 21:15:07,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:15:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:15:07,935 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:15:08,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:15:08,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:15:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:15:08,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:15:08,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2019-09-03 21:15:08,152 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:15:08,152 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 21:15:08,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 21:15:08,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-09-03 21:15:08,154 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 11 states. [2019-09-03 21:15:08,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:15:08,347 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-09-03 21:15:08,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 21:15:08,348 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2019-09-03 21:15:08,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:15:08,349 INFO L225 Difference]: With dead ends: 32 [2019-09-03 21:15:08,349 INFO L226 Difference]: Without dead ends: 28 [2019-09-03 21:15:08,350 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-09-03 21:15:08,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-03 21:15:08,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2019-09-03 21:15:08,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-03 21:15:08,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-09-03 21:15:08,358 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2019-09-03 21:15:08,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:15:08,359 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-09-03 21:15:08,359 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 21:15:08,359 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-09-03 21:15:08,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-03 21:15:08,361 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:15:08,361 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:15:08,361 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:15:08,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:15:08,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1323071607, now seen corresponding path program 1 times [2019-09-03 21:15:08,363 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:15:08,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:08,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:08,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:08,365 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:15:08,379 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:15:08,379 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:15:08,379 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) [2019-09-03 21:15:08,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:08,401 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 [2019-09-03 21:15:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:15:08,416 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2019-09-03 21:15:08,417 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [19], [27], [30], [32], [35], [37], [38], [39], [40], [42], [43], [44] [2019-09-03 21:15:08,422 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:15:08,422 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:15:08,455 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:15:08,456 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 12 root evaluator evaluations with a maximum evaluation depth of 12. Performed 12 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Never found a fixpoint. Largest state had 5 variables. [2019-09-03 21:15:08,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:15:08,456 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:15:08,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:15:08,456 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:15:08,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:08,470 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:15:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:15:08,502 WARN L254 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-03 21:15:08,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:15:08,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:15:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 21:15:08,648 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:15:08,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:15:08,912 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-09-03 21:15:08,913 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:15:11,223 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:15:11,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:15:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 21:15:11,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:15:11,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2019-09-03 21:15:11,618 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:15:11,619 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 21:15:11,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 21:15:11,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=190, Unknown=1, NotChecked=0, Total=240 [2019-09-03 21:15:11,620 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-09-03 21:15:13,497 WARN L188 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2019-09-03 21:15:15,637 WARN L188 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2019-09-03 21:15:16,045 WARN L188 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-09-03 21:15:26,471 WARN L188 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 41 [2019-09-03 21:15:30,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:15:30,654 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-09-03 21:15:30,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 21:15:30,655 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-09-03 21:15:30,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:15:30,656 INFO L225 Difference]: With dead ends: 42 [2019-09-03 21:15:30,656 INFO L226 Difference]: Without dead ends: 37 [2019-09-03 21:15:30,657 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=98, Invalid=362, Unknown=2, NotChecked=0, Total=462 [2019-09-03 21:15:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-03 21:15:30,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-09-03 21:15:30,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-03 21:15:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-09-03 21:15:30,663 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 23 [2019-09-03 21:15:30,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:15:30,664 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-09-03 21:15:30,664 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 21:15:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-09-03 21:15:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-03 21:15:30,665 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:15:30,666 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:15:30,666 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:15:30,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:15:30,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2137184911, now seen corresponding path program 2 times [2019-09-03 21:15:30,667 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:15:30,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:30,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:30,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:30,668 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:15:30,672 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:15:30,672 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:15:30,672 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 [2019-09-03 21:15:30,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 21:15:30,684 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:15:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:15:30,709 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-03 21:15:30,710 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 21:15:30,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:15:30,710 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) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:15:30,722 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 21:15:30,722 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-03 21:15:30,755 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-03 21:15:30,755 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 21:15:30,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-03 21:15:30,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:15:30,879 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:15:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-09-03 21:15:30,913 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:16:09,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:16:15,575 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 36 [2019-09-03 21:16:15,578 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:16:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 35 refuted. 8 times theorem prover too weak. 28 trivial. 0 not checked. [2019-09-03 21:16:15,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:16:15,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2019-09-03 21:16:15,674 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:16:15,674 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-03 21:16:15,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-03 21:16:15,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=362, Unknown=19, NotChecked=0, Total=462 [2019-09-03 21:16:15,675 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 22 states. [2019-09-03 21:16:17,827 WARN L188 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 23 [2019-09-03 21:16:24,962 WARN L188 SmtUtils]: Spent 3.62 s on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2019-09-03 21:16:34,254 WARN L188 SmtUtils]: Spent 7.14 s on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2019-09-03 21:16:34,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:16:34,264 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2019-09-03 21:16:34,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 21:16:34,264 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2019-09-03 21:16:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:16:34,265 INFO L225 Difference]: With dead ends: 39 [2019-09-03 21:16:34,266 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 21:16:34,267 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 62.9s TimeCoverageRelationStatistics Valid=172, Invalid=736, Unknown=22, NotChecked=0, Total=930 [2019-09-03 21:16:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 21:16:34,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 21:16:34,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 21:16:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 21:16:34,268 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2019-09-03 21:16:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:16:34,268 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 21:16:34,268 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-03 21:16:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 21:16:34,268 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 21:16:34,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 09:16:34 BoogieIcfgContainer [2019-09-03 21:16:34,273 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 21:16:34,274 INFO L168 Benchmark]: Toolchain (without parser) took 87967.25 ms. Allocated memory was 133.2 MB in the beginning and 259.0 MB in the end (delta: 125.8 MB). Free memory was 89.1 MB in the beginning and 96.1 MB in the end (delta: -7.0 MB). Peak memory consumption was 118.8 MB. Max. memory is 7.1 GB. [2019-09-03 21:16:34,275 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 133.2 MB. Free memory was 107.5 MB in the beginning and 107.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 21:16:34,276 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.51 ms. Allocated memory is still 133.2 MB. Free memory was 88.9 MB in the beginning and 79.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-09-03 21:16:34,277 INFO L168 Benchmark]: Boogie Preprocessor took 113.97 ms. Allocated memory was 133.2 MB in the beginning and 200.3 MB in the end (delta: 67.1 MB). Free memory was 79.5 MB in the beginning and 176.8 MB in the end (delta: -97.2 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-09-03 21:16:34,277 INFO L168 Benchmark]: RCFGBuilder took 209.44 ms. Allocated memory is still 200.3 MB. Free memory was 176.8 MB in the beginning and 165.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-09-03 21:16:34,278 INFO L168 Benchmark]: TraceAbstraction took 87410.41 ms. Allocated memory was 200.3 MB in the beginning and 259.0 MB in the end (delta: 58.7 MB). Free memory was 165.1 MB in the beginning and 96.1 MB in the end (delta: 69.1 MB). Peak memory consumption was 127.8 MB. Max. memory is 7.1 GB. [2019-09-03 21:16:34,282 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 133.2 MB. Free memory was 107.5 MB in the beginning and 107.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 229.51 ms. Allocated memory is still 133.2 MB. Free memory was 88.9 MB in the beginning and 79.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.97 ms. Allocated memory was 133.2 MB in the beginning and 200.3 MB in the end (delta: 67.1 MB). Free memory was 79.5 MB in the beginning and 176.8 MB in the end (delta: -97.2 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 209.44 ms. Allocated memory is still 200.3 MB. Free memory was 176.8 MB in the beginning and 165.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 87410.41 ms. Allocated memory was 200.3 MB in the beginning and 259.0 MB in the end (delta: 58.7 MB). Free memory was 165.1 MB in the beginning and 96.1 MB in the end (delta: 69.1 MB). Peak memory consumption was 127.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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, 21 locations, 1 error locations. SAFE Result, 87.2s OverallTime, 5 OverallIterations, 6 TraceHistogramMax, 37.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 81 SDtfs, 84 SDslu, 354 SDs, 0 SdLazy, 348 SolverSat, 50 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 13.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 204 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 72.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 48.5s InterpolantComputationTime, 198 NumberOfCodeBlocks, 198 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 189 ConstructedInterpolants, 15 QuantifiedInterpolants, 43704 SizeOfPredicates, 18 NumberOfNonLiveVariables, 242 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 91/190 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...