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/cohendiv.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-03 02:35:41,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-03 02:35:41,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-03 02:35:41,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-03 02:35:41,958 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-03 02:35:41,972 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-03 02:35:41,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-03 02:35:41,972 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-03 02:35:41,973 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-03 02:35:41,973 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-03 02:35:41,974 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-03 02:35:41,974 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-03 02:35:41,974 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-03 02:35:41,974 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-03 02:35:41,974 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-03 02:35:41,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-03 02:35:41,975 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-03 02:35:41,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-03 02:35:41,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-03 02:35:41,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-03 02:35:41,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-03 02:35:41,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-03 02:35:41,976 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-03 02:35:41,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-03 02:35:41,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-03 02:35:41,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-03 02:35:41,977 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-03 02:35:41,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-03 02:35:41,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-03 02:35:41,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-03 02:35:41,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-03 02:35:41,978 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-03 02:35:41,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-03 02:35:41,978 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-03 02:35:41,978 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-03 02:35:42,022 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-03 02:35:42,033 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-03 02:35:42,036 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-03 02:35:42,038 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-03 02:35:42,038 INFO L275 PluginConnector]: CDTParser initialized [2019-10-03 02:35:42,039 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohendiv.c [2019-10-03 02:35:42,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b681bef3/593a0da133534a4ab728a130251313d3/FLAGfdcad4811 [2019-10-03 02:35:42,564 INFO L306 CDTParser]: Found 1 translation units. [2019-10-03 02:35:42,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohendiv.c [2019-10-03 02:35:42,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b681bef3/593a0da133534a4ab728a130251313d3/FLAGfdcad4811 [2019-10-03 02:35:42,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b681bef3/593a0da133534a4ab728a130251313d3 [2019-10-03 02:35:42,960 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-03 02:35:42,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-03 02:35:42,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-03 02:35:42,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-03 02:35:42,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-03 02:35:42,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:35:42" (1/1) ... [2019-10-03 02:35:42,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7745b351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:42, skipping insertion in model container [2019-10-03 02:35:42,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:35:42" (1/1) ... [2019-10-03 02:35:42,977 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-03 02:35:42,991 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-03 02:35:43,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:35:43,189 INFO L188 MainTranslator]: Completed pre-run [2019-10-03 02:35:43,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:35:43,228 INFO L192 MainTranslator]: Completed translation [2019-10-03 02:35:43,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:43 WrapperNode [2019-10-03 02:35:43,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-03 02:35:43,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-03 02:35:43,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-03 02:35:43,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-03 02:35:43,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:43" (1/1) ... [2019-10-03 02:35:43,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:43" (1/1) ... [2019-10-03 02:35:43,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:43" (1/1) ... [2019-10-03 02:35:43,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:43" (1/1) ... [2019-10-03 02:35:43,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:43" (1/1) ... [2019-10-03 02:35:43,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:43" (1/1) ... [2019-10-03 02:35:43,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:43" (1/1) ... [2019-10-03 02:35:43,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-03 02:35:43,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-03 02:35:43,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-03 02:35:43,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-03 02:35:43,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-03 02:35:43,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-03 02:35:43,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-03 02:35:43,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-03 02:35:43,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-03 02:35:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-03 02:35:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-03 02:35:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-03 02:35:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-03 02:35:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-03 02:35:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-03 02:35:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-03 02:35:43,590 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-03 02:35:43,590 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-03 02:35:43,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:35:43 BoogieIcfgContainer [2019-10-03 02:35:43,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-03 02:35:43,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-03 02:35:43,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-03 02:35:43,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-03 02:35:43,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 02:35:42" (1/3) ... [2019-10-03 02:35:43,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781c3457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:35:43, skipping insertion in model container [2019-10-03 02:35:43,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:43" (2/3) ... [2019-10-03 02:35:43,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781c3457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:35:43, skipping insertion in model container [2019-10-03 02:35:43,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:35:43" (3/3) ... [2019-10-03 02:35:43,604 INFO L109 eAbstractionObserver]: Analyzing ICFG cohendiv.c [2019-10-03 02:35:43,618 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-03 02:35:43,628 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-03 02:35:43,646 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-03 02:35:43,676 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-03 02:35:43,676 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-03 02:35:43,676 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-03 02:35:43,676 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-03 02:35:43,676 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-03 02:35:43,677 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-03 02:35:43,677 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-03 02:35:43,677 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-03 02:35:43,692 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-03 02:35:43,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-03 02:35:43,703 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:35:43,704 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:35:43,706 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:35:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:43,712 INFO L82 PathProgramCache]: Analyzing trace with hash -14138861, now seen corresponding path program 1 times [2019-10-03 02:35:43,714 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:35:43,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:43,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:43,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:43,764 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:35:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:35:43,834 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:35:43,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-03 02:35:43,834 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:35:43,838 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-03 02:35:43,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-03 02:35:43,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-03 02:35:43,850 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-10-03 02:35:43,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:35:43,867 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2019-10-03 02:35:43,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-03 02:35:43,868 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-03 02:35:43,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:35:43,875 INFO L225 Difference]: With dead ends: 29 [2019-10-03 02:35:43,876 INFO L226 Difference]: Without dead ends: 24 [2019-10-03 02:35:43,877 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-03 02:35:43,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-03 02:35:43,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-03 02:35:43,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-03 02:35:43,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-10-03 02:35:43,918 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 10 [2019-10-03 02:35:43,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:35:43,918 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-10-03 02:35:43,919 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-03 02:35:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-10-03 02:35:43,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-03 02:35:43,919 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:35:43,920 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:35:43,920 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:35:43,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:43,920 INFO L82 PathProgramCache]: Analyzing trace with hash -12649311, now seen corresponding path program 1 times [2019-10-03 02:35:43,921 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:35:43,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:43,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:43,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:43,923 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:35:43,930 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:35:43,930 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:35:43,931 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:35:43,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:43,952 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:35:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:43,972 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-10-03 02:35:43,973 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-03 02:35:43,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:35:43,973 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) [2019-10-03 02:35:43,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:43,991 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 [2019-10-03 02:35:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:44,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-03 02:35:44,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:35:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:35:44,086 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:35:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:35:44,143 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:35:44,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-03 02:35:44,143 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:35:44,144 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-03 02:35:44,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-03 02:35:44,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-03 02:35:44,145 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2019-10-03 02:35:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:35:44,235 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2019-10-03 02:35:44,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-03 02:35:44,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-03 02:35:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:35:44,237 INFO L225 Difference]: With dead ends: 33 [2019-10-03 02:35:44,237 INFO L226 Difference]: Without dead ends: 33 [2019-10-03 02:35:44,239 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-03 02:35:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-03 02:35:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-10-03 02:35:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-03 02:35:44,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-10-03 02:35:44,255 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 10 [2019-10-03 02:35:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:35:44,256 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-10-03 02:35:44,256 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-03 02:35:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-10-03 02:35:44,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-03 02:35:44,257 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:35:44,257 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:35:44,258 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:35:44,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:44,259 INFO L82 PathProgramCache]: Analyzing trace with hash 71526866, now seen corresponding path program 1 times [2019-10-03 02:35:44,260 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:35:44,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:44,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:44,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:44,263 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:35:44,277 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:35:44,278 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:35:44,278 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 [2019-10-03 02:35:44,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:44,301 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:35:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:44,319 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2019-10-03 02:35:44,321 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [50], [53], [55], [58], [60], [61], [62], [63], [65], [66], [67] [2019-10-03 02:35:44,367 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:35:44,368 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:35:44,470 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:35:44,472 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 20 root evaluator evaluations with a maximum evaluation depth of 6. Performed 20 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 8 variables. [2019-10-03 02:35:44,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:44,475 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:35:44,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:35:44,476 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:35:44,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:44,494 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-03 02:35:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:44,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-03 02:35:44,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:35:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:35:44,548 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:35:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:35:44,596 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:35:44,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-03 02:35:44,596 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:35:44,597 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-03 02:35:44,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-03 02:35:44,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-03 02:35:44,598 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2019-10-03 02:35:44,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:35:44,690 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2019-10-03 02:35:44,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-03 02:35:44,690 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-10-03 02:35:44,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:35:44,692 INFO L225 Difference]: With dead ends: 45 [2019-10-03 02:35:44,692 INFO L226 Difference]: Without dead ends: 44 [2019-10-03 02:35:44,693 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-03 02:35:44,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-03 02:35:44,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-10-03 02:35:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-03 02:35:44,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2019-10-03 02:35:44,703 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 15 [2019-10-03 02:35:44,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:35:44,703 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2019-10-03 02:35:44,704 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-03 02:35:44,704 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2019-10-03 02:35:44,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-03 02:35:44,705 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:35:44,705 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:35:44,705 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:35:44,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:44,706 INFO L82 PathProgramCache]: Analyzing trace with hash -365378422, now seen corresponding path program 1 times [2019-10-03 02:35:44,706 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:35:44,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:44,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:44,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:44,708 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:35:44,714 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:35:44,714 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:35:44,714 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:35:44,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:44,740 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:35:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:44,767 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2019-10-03 02:35:44,767 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [20], [29], [50], [53], [55], [58], [60], [61], [62], [63], [65], [66], [67], [68], [69] [2019-10-03 02:35:44,770 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:35:44,770 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:35:44,794 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:35:44,794 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 20 root evaluator evaluations with a maximum evaluation depth of 6. Performed 20 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 8 variables. [2019-10-03 02:35:44,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:44,795 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:35:44,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:35:44,795 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 [2019-10-03 02:35:44,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:44,816 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-03 02:35:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:44,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-03 02:35:44,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:35:44,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-03 02:35:44,879 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:35:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-03 02:35:44,916 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:35:44,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2019-10-03 02:35:44,917 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:35:44,917 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-03 02:35:44,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-03 02:35:44,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-03 02:35:44,918 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 6 states. [2019-10-03 02:35:45,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:35:45,027 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2019-10-03 02:35:45,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-03 02:35:45,028 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-10-03 02:35:45,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:35:45,029 INFO L225 Difference]: With dead ends: 67 [2019-10-03 02:35:45,030 INFO L226 Difference]: Without dead ends: 67 [2019-10-03 02:35:45,030 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-03 02:35:45,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-03 02:35:45,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2019-10-03 02:35:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-03 02:35:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2019-10-03 02:35:45,041 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 22 [2019-10-03 02:35:45,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:35:45,042 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2019-10-03 02:35:45,042 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-03 02:35:45,042 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2019-10-03 02:35:45,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-03 02:35:45,043 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:35:45,043 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:35:45,044 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:35:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:45,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1963256918, now seen corresponding path program 1 times [2019-10-03 02:35:45,044 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:35:45,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:45,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:45,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:45,046 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:35:45,051 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:35:45,051 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:35:45,051 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:35:45,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:45,067 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:35:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:45,080 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2019-10-03 02:35:45,081 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [20], [29], [50], [53], [55], [58], [60], [61], [62], [63], [65], [66], [67], [68], [69], [70], [71], [72], [73] [2019-10-03 02:35:45,083 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:35:45,083 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:35:45,104 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:35:45,105 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 20 root evaluator evaluations with a maximum evaluation depth of 6. Performed 20 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 8 variables. [2019-10-03 02:35:45,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:45,105 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:35:45,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:35:45,105 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 [2019-10-03 02:35:45,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:45,137 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-03 02:35:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:45,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-03 02:35:45,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:35:45,174 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:35:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-03 02:35:45,200 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:35:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-03 02:35:45,272 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:35:45,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2019-10-03 02:35:45,272 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:35:45,273 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-03 02:35:45,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-03 02:35:45,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-03 02:35:45,274 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand 6 states. [2019-10-03 02:35:45,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:35:45,349 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2019-10-03 02:35:45,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-03 02:35:45,350 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-10-03 02:35:45,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:35:45,353 INFO L225 Difference]: With dead ends: 64 [2019-10-03 02:35:45,353 INFO L226 Difference]: Without dead ends: 64 [2019-10-03 02:35:45,354 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-03 02:35:45,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-03 02:35:45,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-10-03 02:35:45,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-03 02:35:45,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2019-10-03 02:35:45,364 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 32 [2019-10-03 02:35:45,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:35:45,364 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2019-10-03 02:35:45,364 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-03 02:35:45,365 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2019-10-03 02:35:45,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-03 02:35:45,366 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:35:45,366 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:35:45,366 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:35:45,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:45,367 INFO L82 PathProgramCache]: Analyzing trace with hash -363064690, now seen corresponding path program 1 times [2019-10-03 02:35:45,367 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:35:45,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:45,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:45,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:45,370 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:35:45,376 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:35:45,376 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:35:45,376 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:35:45,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:45,407 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:35:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:45,424 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2019-10-03 02:35:45,424 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [20], [29], [37], [50], [53], [55], [58], [60], [61], [62], [63], [65], [66], [67], [68], [69], [70], [71], [72], [73], [74], [75] [2019-10-03 02:35:45,426 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:35:45,426 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:35:45,442 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:35:45,443 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 20 root evaluator evaluations with a maximum evaluation depth of 6. Performed 20 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 8 variables. [2019-10-03 02:35:45,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:45,443 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:35:45,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:35:45,443 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-03 02:35:45,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:45,477 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:35:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:45,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-03 02:35:45,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:35:45,541 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:35:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-03 02:35:45,560 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:35:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-03 02:35:45,663 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:35:45,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2019-10-03 02:35:45,664 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:35:45,664 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-03 02:35:45,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-03 02:35:45,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-03 02:35:45,665 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 7 states. [2019-10-03 02:35:45,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:35:45,818 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2019-10-03 02:35:45,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-03 02:35:45,820 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2019-10-03 02:35:45,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:35:45,822 INFO L225 Difference]: With dead ends: 75 [2019-10-03 02:35:45,822 INFO L226 Difference]: Without dead ends: 75 [2019-10-03 02:35:45,823 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-03 02:35:45,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-03 02:35:45,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2019-10-03 02:35:45,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-03 02:35:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2019-10-03 02:35:45,839 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 38 [2019-10-03 02:35:45,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:35:45,840 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2019-10-03 02:35:45,840 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-03 02:35:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2019-10-03 02:35:45,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-03 02:35:45,844 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:35:45,844 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:35:45,845 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:35:45,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:45,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1044881029, now seen corresponding path program 1 times [2019-10-03 02:35:45,845 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:35:45,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:45,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:45,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:45,847 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:35:45,852 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:35:45,852 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:35:45,852 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:35:45,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:45,877 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:35:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:45,892 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 46 with the following transitions: [2019-10-03 02:35:45,892 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [20], [29], [35], [43], [50], [53], [55], [58], [60], [61], [62], [63], [65], [66], [67], [68], [69], [70], [71], [72], [73], [74] [2019-10-03 02:35:45,894 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:35:45,895 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:35:45,908 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:35:45,908 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 20 root evaluator evaluations with a maximum evaluation depth of 6. Performed 20 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 8 variables. [2019-10-03 02:35:45,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:45,908 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:35:45,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:35:45,909 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:35:45,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:45,931 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-03 02:35:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:45,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-03 02:35:45,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:35:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-03 02:35:46,024 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:35:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-03 02:35:46,139 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-03 02:35:46,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2019-10-03 02:35:46,139 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:35:46,140 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-03 02:35:46,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-03 02:35:46,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-03 02:35:46,141 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 6 states. [2019-10-03 02:35:46,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:35:46,242 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2019-10-03 02:35:46,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-03 02:35:46,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2019-10-03 02:35:46,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:35:46,248 INFO L225 Difference]: With dead ends: 74 [2019-10-03 02:35:46,248 INFO L226 Difference]: Without dead ends: 73 [2019-10-03 02:35:46,249 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-03 02:35:46,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-03 02:35:46,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-10-03 02:35:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-03 02:35:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2019-10-03 02:35:46,263 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 45 [2019-10-03 02:35:46,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:35:46,263 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2019-10-03 02:35:46,263 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-03 02:35:46,264 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2019-10-03 02:35:46,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-03 02:35:46,266 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:35:46,266 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:35:46,266 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:35:46,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:46,266 INFO L82 PathProgramCache]: Analyzing trace with hash 228915751, now seen corresponding path program 1 times [2019-10-03 02:35:46,267 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:35:46,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:46,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:46,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:46,269 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:35:46,273 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:35:46,273 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:35:46,273 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:35:46,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:46,298 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:35:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:46,319 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 62 with the following transitions: [2019-10-03 02:35:46,319 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [20], [29], [37], [39], [50], [53], [55], [58], [60], [61], [62], [63], [65], [66], [67], [68], [69], [70], [71], [72], [73], [74], [75], [76] [2019-10-03 02:35:46,323 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:35:46,323 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:35:46,346 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:35:46,346 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 20 root evaluator evaluations with a maximum evaluation depth of 6. Performed 20 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 8 variables. [2019-10-03 02:35:46,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:46,350 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:35:46,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:35:46,350 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:35:46,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:46,375 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-03 02:35:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:46,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-03 02:35:46,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:35:46,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:35:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-10-03 02:35:46,489 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:35:46,578 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:35:46,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:35:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-10-03 02:35:46,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-03 02:35:46,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-10-03 02:35:46,628 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:35:46,628 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-03 02:35:46,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-03 02:35:46,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-03 02:35:46,630 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand 13 states. [2019-10-03 02:35:46,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:35:46,792 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2019-10-03 02:35:46,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-03 02:35:46,793 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2019-10-03 02:35:46,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:35:46,794 INFO L225 Difference]: With dead ends: 75 [2019-10-03 02:35:46,794 INFO L226 Difference]: Without dead ends: 0 [2019-10-03 02:35:46,795 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-10-03 02:35:46,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-03 02:35:46,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-03 02:35:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-03 02:35:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-03 02:35:46,796 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 61 [2019-10-03 02:35:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:35:46,796 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-03 02:35:46,796 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-03 02:35:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-03 02:35:46,797 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-03 02:35:46,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 02:35:46 BoogieIcfgContainer [2019-10-03 02:35:46,801 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-03 02:35:46,803 INFO L168 Benchmark]: Toolchain (without parser) took 3840.65 ms. Allocated memory was 132.6 MB in the beginning and 261.1 MB in the end (delta: 128.5 MB). Free memory was 87.2 MB in the beginning and 88.6 MB in the end (delta: -1.4 MB). Peak memory consumption was 127.0 MB. Max. memory is 7.1 GB. [2019-10-03 02:35:46,804 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 132.6 MB. Free memory was 105.5 MB in the beginning and 105.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-03 02:35:46,805 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.94 ms. Allocated memory is still 132.6 MB. Free memory was 86.7 MB in the beginning and 77.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-10-03 02:35:46,806 INFO L168 Benchmark]: Boogie Preprocessor took 111.68 ms. Allocated memory was 132.6 MB in the beginning and 199.8 MB in the end (delta: 67.1 MB). Free memory was 77.1 MB in the beginning and 176.6 MB in the end (delta: -99.5 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-10-03 02:35:46,807 INFO L168 Benchmark]: RCFGBuilder took 250.18 ms. Allocated memory is still 199.8 MB. Free memory was 176.6 MB in the beginning and 163.2 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2019-10-03 02:35:46,808 INFO L168 Benchmark]: TraceAbstraction took 3206.89 ms. Allocated memory was 199.8 MB in the beginning and 261.1 MB in the end (delta: 61.3 MB). Free memory was 162.6 MB in the beginning and 88.6 MB in the end (delta: 74.1 MB). Peak memory consumption was 135.4 MB. Max. memory is 7.1 GB. [2019-10-03 02:35:46,812 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 132.6 MB. Free memory was 105.5 MB in the beginning and 105.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.94 ms. Allocated memory is still 132.6 MB. Free memory was 86.7 MB in the beginning and 77.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.68 ms. Allocated memory was 132.6 MB in the beginning and 199.8 MB in the end (delta: 67.1 MB). Free memory was 77.1 MB in the beginning and 176.6 MB in the end (delta: -99.5 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 250.18 ms. Allocated memory is still 199.8 MB. Free memory was 176.6 MB in the beginning and 163.2 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3206.89 ms. Allocated memory was 199.8 MB in the beginning and 261.1 MB in the end (delta: 61.3 MB). Free memory was 162.6 MB in the beginning and 88.6 MB in the end (delta: 74.1 MB). Peak memory consumption was 135.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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, 29 locations, 1 error locations. SAFE Result, 3.1s OverallTime, 8 OverallIterations, 10 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 221 SDtfs, 110 SDslu, 526 SDs, 0 SdLazy, 382 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 453 GetRequests, 382 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 6 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 456 NumberOfCodeBlocks, 456 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 441 ConstructedInterpolants, 8 QuantifiedInterpolants, 46794 SizeOfPredicates, 25 NumberOfNonLiveVariables, 546 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 15 InterpolantComputations, 12 PerfectInterpolantSequences, 653/670 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...