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 0.1.24-112bae1 [2019-09-10 02:27:23,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 02:27:23,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 02:27:23,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 02:27:23,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-10 02:27:23,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-10 02:27:23,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-10 02:27:23,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-10 02:27:23,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-10 02:27:23,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-10 02:27:23,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-10 02:27:23,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-10 02:27:23,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 02:27:23,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 02:27:23,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 02:27:23,437 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 [2019-09-10 02:27:23,459 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 02:27:23,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 02:27:23,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 02:27:23,460 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 02:27:23,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 02:27:23,461 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 02:27:23,461 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 02:27:23,461 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 02:27:23,461 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 02:27:23,462 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 02:27:23,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 02:27:23,464 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 02:27:23,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 02:27:23,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 02:27:23,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 02:27:23,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 02:27:23,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 02:27:23,465 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 02:27:23,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 02:27:23,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 02:27:23,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 02:27:23,466 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 02:27:23,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 02:27:23,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 02:27:23,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 02:27:23,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 02:27:23,467 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 02:27:23,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 02:27:23,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 02:27:23,468 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 02:27:23,519 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 02:27:23,531 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 02:27:23,534 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 02:27:23,536 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 02:27:23,536 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 02:27:23,537 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps4.c [2019-09-10 02:27:23,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4772633df/ae39471fa013471dbc60fb633e7c499f/FLAG6473b0688 [2019-09-10 02:27:23,994 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 02:27:23,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps4.c [2019-09-10 02:27:24,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4772633df/ae39471fa013471dbc60fb633e7c499f/FLAG6473b0688 [2019-09-10 02:27:24,405 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4772633df/ae39471fa013471dbc60fb633e7c499f [2019-09-10 02:27:24,413 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 02:27:24,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 02:27:24,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 02:27:24,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 02:27:24,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 02:27:24,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:27:24" (1/1) ... [2019-09-10 02:27:24,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24c983d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:27:24, skipping insertion in model container [2019-09-10 02:27:24,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:27:24" (1/1) ... [2019-09-10 02:27:24,429 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 02:27:24,447 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 02:27:24,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:27:24,660 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 02:27:24,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:27:24,687 INFO L192 MainTranslator]: Completed translation [2019-09-10 02:27:24,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:27:24 WrapperNode [2019-09-10 02:27:24,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 02:27:24,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 02:27:24,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 02:27:24,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 02:27:24,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:27:24" (1/1) ... [2019-09-10 02:27:24,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:27:24" (1/1) ... [2019-09-10 02:27:24,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:27:24" (1/1) ... [2019-09-10 02:27:24,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:27:24" (1/1) ... [2019-09-10 02:27:24,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:27:24" (1/1) ... [2019-09-10 02:27:24,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:27:24" (1/1) ... [2019-09-10 02:27:24,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:27:24" (1/1) ... [2019-09-10 02:27:24,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 02:27:24,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 02:27:24,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 02:27:24,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 02:27:24,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:27:24" (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 [2019-09-10 02:27:24,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 02:27:24,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 02:27:24,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-10 02:27:24,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 02:27:24,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 02:27:24,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-10 02:27:24,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-10 02:27:24,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-10 02:27:24,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 02:27:24,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 02:27:24,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 02:27:25,033 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 02:27:25,033 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-10 02:27:25,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:27:25 BoogieIcfgContainer [2019-09-10 02:27:25,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 02:27:25,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 02:27:25,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 02:27:25,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 02:27:25,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 02:27:24" (1/3) ... [2019-09-10 02:27:25,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd997a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:27:25, skipping insertion in model container [2019-09-10 02:27:25,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:27:24" (2/3) ... [2019-09-10 02:27:25,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd997a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:27:25, skipping insertion in model container [2019-09-10 02:27:25,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:27:25" (3/3) ... [2019-09-10 02:27:25,041 INFO L109 eAbstractionObserver]: Analyzing ICFG ps4.c [2019-09-10 02:27:25,051 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 02:27:25,057 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 02:27:25,073 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 02:27:25,097 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 02:27:25,098 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 02:27:25,098 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 02:27:25,098 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 02:27:25,098 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 02:27:25,098 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 02:27:25,098 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 02:27:25,099 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 02:27:25,113 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-10 02:27:25,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-10 02:27:25,121 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:27:25,122 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:27:25,124 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:27:25,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:27:25,128 INFO L82 PathProgramCache]: Analyzing trace with hash -148746498, now seen corresponding path program 1 times [2019-09-10 02:27:25,130 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:27:25,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:27:25,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:27:25,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:27:25,167 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:27:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:27:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:27:25,225 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:27:25,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-10 02:27:25,226 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:27:25,229 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 02:27:25,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 02:27:25,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 02:27:25,242 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-09-10 02:27:25,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:27:25,256 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-09-10 02:27:25,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 02:27:25,258 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-10 02:27:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:27:25,267 INFO L225 Difference]: With dead ends: 21 [2019-09-10 02:27:25,267 INFO L226 Difference]: Without dead ends: 16 [2019-09-10 02:27:25,269 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 [2019-09-10 02:27:25,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-10 02:27:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-10 02:27:25,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-10 02:27:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-10 02:27:25,305 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-09-10 02:27:25,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:27:25,306 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-10 02:27:25,306 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 02:27:25,306 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-10 02:27:25,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-10 02:27:25,308 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:27:25,308 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:27:25,308 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:27:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:27:25,309 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-09-10 02:27:25,309 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:27:25,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:27:25,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:27:25,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:27:25,310 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:27:25,316 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:27:25,316 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:27:25,316 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 [2019-09-10 02:27:25,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:27:25,333 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:27:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:27:25,347 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-10 02:27:25,348 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:27:25,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:27:25,348 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 [2019-09-10 02:27:25,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:27:25,362 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:27:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:27:25,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-10 02:27:25,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:27:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:27:25,483 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:27:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:27:25,607 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:27:25,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-10 02:27:25,607 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:27:25,608 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 02:27:25,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 02:27:25,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-10 02:27:25,609 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-09-10 02:27:25,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:27:25,692 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-09-10 02:27:25,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 02:27:25,693 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-10 02:27:25,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:27:25,694 INFO L225 Difference]: With dead ends: 25 [2019-09-10 02:27:25,694 INFO L226 Difference]: Without dead ends: 23 [2019-09-10 02:27:25,697 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 [2019-09-10 02:27:25,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-10 02:27:25,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-10 02:27:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-10 02:27:25,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-10 02:27:25,712 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-09-10 02:27:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:27:25,713 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-10 02:27:25,714 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 02:27:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-10 02:27:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-10 02:27:25,715 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:27:25,715 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:27:25,716 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:27:25,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:27:25,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1425845280, now seen corresponding path program 1 times [2019-09-10 02:27:25,717 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:27:25,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:27:25,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:27:25,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:27:25,719 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:27:25,728 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:27:25,729 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:27:25,729 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 [2019-09-10 02:27:25,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:27:25,741 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:27:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:27:25,758 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2019-09-10 02:27:25,760 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [27], [30], [32], [35], [37], [38], [39], [40], [42], [43] [2019-09-10 02:27:25,794 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:27:25,794 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:27:25,938 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:27:25,939 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. [2019-09-10 02:27:25,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:27:25,943 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:27:25,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:27:25,943 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 [2019-09-10 02:27:25,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:27:25,966 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:27:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:27:25,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-10 02:27:25,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:27:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:27:26,090 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:27:26,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:26,297 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:27:26,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 02:27:26,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2019-09-10 02:27:26,338 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:27:26,339 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-10 02:27:26,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-10 02:27:26,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-09-10 02:27:26,340 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 11 states. [2019-09-10 02:27:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:27:26,502 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-09-10 02:27:26,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-10 02:27:26,503 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2019-09-10 02:27:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:27:26,505 INFO L225 Difference]: With dead ends: 32 [2019-09-10 02:27:26,505 INFO L226 Difference]: Without dead ends: 28 [2019-09-10 02:27:26,505 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 [2019-09-10 02:27:26,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-10 02:27:26,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2019-09-10 02:27:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-10 02:27:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-09-10 02:27:26,515 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2019-09-10 02:27:26,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:27:26,515 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-09-10 02:27:26,515 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-10 02:27:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-09-10 02:27:26,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-10 02:27:26,517 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:27:26,518 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:27:26,518 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:27:26,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:27:26,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1323071607, now seen corresponding path program 1 times [2019-09-10 02:27:26,519 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:27:26,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:27:26,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:27:26,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:27:26,520 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:27:26,533 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:27:26,534 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:27:26,534 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) [2019-09-10 02:27:26,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:27:26,556 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 [2019-09-10 02:27:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:27:26,571 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2019-09-10 02:27:26,571 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [19], [27], [30], [32], [35], [37], [38], [39], [40], [42], [43], [44] [2019-09-10 02:27:26,575 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:27:26,576 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:27:26,627 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:27:26,627 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. [2019-09-10 02:27:26,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:27:26,628 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:27:26,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:27:26,630 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 [2019-09-10 02:27:26,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:27:26,654 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:27:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:27:26,674 WARN L254 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-10 02:27:26,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:27:26,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-10 02:27:26,807 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:27:26,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:27,069 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-09-10 02:27:27,071 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:29,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:29,754 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 02:27:29,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 02:27:29,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2019-09-10 02:27:29,792 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:27:29,793 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-10 02:27:29,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-10 02:27:29,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=190, Unknown=1, NotChecked=0, Total=240 [2019-09-10 02:27:29,795 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-09-10 02:27:31,673 WARN L188 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2019-09-10 02:27:33,834 WARN L188 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2019-09-10 02:27:34,817 WARN L188 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-09-10 02:27:41,865 WARN L188 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-09-10 02:27:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:27:46,072 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-09-10 02:27:46,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-10 02:27:46,073 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-09-10 02:27:46,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:27:46,074 INFO L225 Difference]: With dead ends: 42 [2019-09-10 02:27:46,074 INFO L226 Difference]: Without dead ends: 37 [2019-09-10 02:27:46,075 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=98, Invalid=361, Unknown=3, NotChecked=0, Total=462 [2019-09-10 02:27:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-10 02:27:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-09-10 02:27:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-10 02:27:46,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-09-10 02:27:46,087 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 23 [2019-09-10 02:27:46,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:27:46,088 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-09-10 02:27:46,088 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-10 02:27:46,088 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-09-10 02:27:46,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-10 02:27:46,090 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:27:46,090 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:27:46,090 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:27:46,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:27:46,091 INFO L82 PathProgramCache]: Analyzing trace with hash 2137184911, now seen corresponding path program 2 times [2019-09-10 02:27:46,091 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:27:46,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:27:46,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:27:46,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:27:46,092 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:27:46,096 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:27:46,096 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:27:46,096 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 [2019-09-10 02:27:46,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 02:27:46,116 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:27:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:27:46,131 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:27:46,132 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:27:46,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:27:46,132 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 [2019-09-10 02:27:46,158 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 02:27:46,158 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-10 02:27:46,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-10 02:27:46,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 02:27:46,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-10 02:27:46,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:27:46,298 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-09-10 02:27:46,323 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:28:15,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:28:18,297 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:28:18,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:28:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 33 refuted. 10 times theorem prover too weak. 28 trivial. 0 not checked. [2019-09-10 02:28:18,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 02:28:18,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2019-09-10 02:28:18,430 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:28:18,430 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-10 02:28:18,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-10 02:28:18,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=367, Unknown=14, NotChecked=0, Total=462 [2019-09-10 02:28:18,431 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 22 states. [2019-09-10 02:28:18,984 WARN L188 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 22 [2019-09-10 02:28:19,414 WARN L188 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 23 [2019-09-10 02:28:26,318 WARN L188 SmtUtils]: Spent 4.82 s on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2019-09-10 02:28:33,949 WARN L188 SmtUtils]: Spent 7.30 s on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2019-09-10 02:28:37,581 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_main_~y~0 c_main_~y~0))) (let ((.cse1 (- .cse2))) (and (forall ((main_~k~0 Int)) (or (= 0 (let ((.cse0 (+ c_main_~y~0 2))) (+ (* main_~k~0 .cse0) (- (* .cse0 .cse0))))) (<= main_~k~0 (+ c_main_~c~0 1)) (< (+ c_main_~c~0 2) main_~k~0))) (or (not (= 0 (+ .cse1 (+ (+ (* 4 c_main_~x~0) (- (* (* c_main_~y~0 .cse2) c_main_~y~0))) (- (* c_main_~y~0 (* c_main_~y~0 (* 2 c_main_~y~0)))))))) (forall ((main_~k~0 Int)) (or (= (let ((.cse3 (+ c_main_~y~0 4))) (+ (* .cse3 main_~k~0) (- (* .cse3 .cse3)))) 0) (<= main_~k~0 (+ c_main_~c~0 3)) (< (+ c_main_~c~0 4) main_~k~0)))) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (= 0 (let ((.cse4 (+ c_main_~y~0 1))) (+ (* main_~k~0 .cse4) (- (* .cse4 .cse4))))) (<= main_~k~0 c_main_~c~0))) (or (< c_main_~c~0 c_main_~k~0) (= (+ (* c_main_~k~0 c_main_~y~0) .cse1) 0)) (forall ((main_~k~0 Int)) (or (<= main_~k~0 (+ c_main_~c~0 2)) (< (+ c_main_~c~0 3) main_~k~0) (= (let ((.cse5 (+ c_main_~y~0 3))) (+ (* main_~k~0 .cse5) (- (* .cse5 .cse5)))) 0)))))) is different from false [2019-09-10 02:28:37,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:28:37,586 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2019-09-10 02:28:37,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-10 02:28:37,588 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2019-09-10 02:28:37,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:28:37,588 INFO L225 Difference]: With dead ends: 41 [2019-09-10 02:28:37,588 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 02:28:37,589 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 47.2s TimeCoverageRelationStatistics Valid=174, Invalid=744, Unknown=16, NotChecked=58, Total=992 [2019-09-10 02:28:37,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 02:28:37,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 02:28:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 02:28:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 02:28:37,590 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2019-09-10 02:28:37,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:28:37,590 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 02:28:37,591 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-10 02:28:37,591 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 02:28:37,591 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 02:28:37,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 02:28:37 BoogieIcfgContainer [2019-09-10 02:28:37,595 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 02:28:37,596 INFO L168 Benchmark]: Toolchain (without parser) took 73181.96 ms. Allocated memory was 136.8 MB in the beginning and 251.1 MB in the end (delta: 114.3 MB). Free memory was 91.3 MB in the beginning and 211.4 MB in the end (delta: -120.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-10 02:28:37,597 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 136.8 MB. Free memory was 111.3 MB in the beginning and 111.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 02:28:37,598 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.58 ms. Allocated memory is still 136.8 MB. Free memory was 91.1 MB in the beginning and 81.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-09-10 02:28:37,599 INFO L168 Benchmark]: Boogie Preprocessor took 109.17 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 81.8 MB in the beginning and 178.6 MB in the end (delta: -96.9 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-09-10 02:28:37,600 INFO L168 Benchmark]: RCFGBuilder took 235.72 ms. Allocated memory is still 201.9 MB. Free memory was 178.1 MB in the beginning and 167.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-09-10 02:28:37,601 INFO L168 Benchmark]: TraceAbstraction took 72559.16 ms. Allocated memory was 201.9 MB in the beginning and 251.1 MB in the end (delta: 49.3 MB). Free memory was 167.1 MB in the beginning and 211.4 MB in the end (delta: -44.4 MB). Peak memory consumption was 4.9 MB. Max. memory is 7.1 GB. [2019-09-10 02:28:37,605 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 136.8 MB. Free memory was 111.3 MB in the beginning and 111.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.58 ms. Allocated memory is still 136.8 MB. Free memory was 91.1 MB in the beginning and 81.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.17 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 81.8 MB in the beginning and 178.6 MB in the end (delta: -96.9 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 235.72 ms. Allocated memory is still 201.9 MB. Free memory was 178.1 MB in the beginning and 167.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 72559.16 ms. Allocated memory was 201.9 MB in the beginning and 251.1 MB in the end (delta: 49.3 MB). Free memory was 167.1 MB in the beginning and 211.4 MB in the end (delta: -44.4 MB). Peak memory consumption was 4.9 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, 72.5s OverallTime, 5 OverallIterations, 6 TraceHistogramMax, 35.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 81 SDtfs, 84 SDslu, 354 SDs, 0 SdLazy, 348 SolverSat, 50 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 14.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 206 GetRequests, 134 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 55.8s 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, 35.9s 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...