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/freire1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 21:10:17,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 21:10:17,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 21:10:17,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 21:10:17,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 21:10:17,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 21:10:17,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 21:10:17,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 21:10:17,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 21:10:17,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 21:10:17,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 21:10:17,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 21:10:17,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 21:10:17,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 21:10:17,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 21:10:17,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 21:10:17,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 21:10:17,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 21:10:17,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 21:10:17,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 21:10:17,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 21:10:17,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 21:10:17,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 21:10:17,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 21:10:17,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 21:10:17,948 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-03 21:10:17,962 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 21:10:17,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 21:10:17,963 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 21:10:17,963 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 21:10:17,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 21:10:17,964 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 21:10:17,964 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 21:10:17,964 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 21:10:17,964 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 21:10:17,964 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 21:10:17,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 21:10:17,965 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 21:10:17,965 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 21:10:17,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 21:10:17,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 21:10:17,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 21:10:17,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 21:10:17,966 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 21:10:17,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 21:10:17,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 21:10:17,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 21:10:17,967 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 21:10:17,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 21:10:17,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 21:10:17,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 21:10:17,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 21:10:17,968 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 21:10:17,968 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 21:10:17,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 21:10:17,969 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 21:10:17,996 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 21:10:18,009 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 21:10:18,012 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 21:10:18,014 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 21:10:18,014 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 21:10:18,015 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/freire1.c [2019-09-03 21:10:18,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65344d507/b3c74ebbe28847e0a5e5e240954fa281/FLAG6d89f2daa [2019-09-03 21:10:18,522 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 21:10:18,523 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/freire1.c [2019-09-03 21:10:18,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65344d507/b3c74ebbe28847e0a5e5e240954fa281/FLAG6d89f2daa [2019-09-03 21:10:18,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65344d507/b3c74ebbe28847e0a5e5e240954fa281 [2019-09-03 21:10:18,891 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 21:10:18,892 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 21:10:18,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 21:10:18,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 21:10:18,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 21:10:18,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:10:18" (1/1) ... [2019-09-03 21:10:18,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57ccb992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:18, skipping insertion in model container [2019-09-03 21:10:18,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:10:18" (1/1) ... [2019-09-03 21:10:18,908 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 21:10:18,925 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 21:10:19,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:10:19,143 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 21:10:19,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:10:19,178 INFO L192 MainTranslator]: Completed translation [2019-09-03 21:10:19,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:19 WrapperNode [2019-09-03 21:10:19,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 21:10:19,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 21:10:19,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 21:10:19,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 21:10:19,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:19" (1/1) ... [2019-09-03 21:10:19,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:19" (1/1) ... [2019-09-03 21:10:19,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:19" (1/1) ... [2019-09-03 21:10:19,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:19" (1/1) ... [2019-09-03 21:10:19,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:19" (1/1) ... [2019-09-03 21:10:19,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:19" (1/1) ... [2019-09-03 21:10:19,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:19" (1/1) ... [2019-09-03 21:10:19,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 21:10:19,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 21:10:19,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 21:10:19,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 21:10:19,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 21:10:19,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 21:10:19,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 21:10:19,345 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 21:10:19,345 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 21:10:19,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 21:10:19,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2019-09-03 21:10:19,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 21:10:19,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 21:10:19,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 21:10:19,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 21:10:19,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 21:10:19,504 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 21:10:19,504 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 21:10:19,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:10:19 BoogieIcfgContainer [2019-09-03 21:10:19,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 21:10:19,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 21:10:19,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 21:10:19,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 21:10:19,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 09:10:18" (1/3) ... [2019-09-03 21:10:19,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bca7372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 09:10:19, skipping insertion in model container [2019-09-03 21:10:19,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:19" (2/3) ... [2019-09-03 21:10:19,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bca7372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 09:10:19, skipping insertion in model container [2019-09-03 21:10:19,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:10:19" (3/3) ... [2019-09-03 21:10:19,514 INFO L109 eAbstractionObserver]: Analyzing ICFG freire1.c [2019-09-03 21:10:19,524 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 21:10:19,532 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 21:10:19,550 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 21:10:19,590 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 21:10:19,590 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 21:10:19,590 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 21:10:19,590 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 21:10:19,591 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 21:10:19,591 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 21:10:19,591 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 21:10:19,591 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 21:10:19,609 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-03 21:10:19,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 21:10:19,624 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:10:19,625 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:10:19,631 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:10:19,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:10:19,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1712389503, now seen corresponding path program 1 times [2019-09-03 21:10:19,642 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:10:19,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:10:19,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:10:19,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:10:19,704 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:10:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:10:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:10:19,764 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:10:19,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 21:10:19,765 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:10:19,769 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 21:10:19,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 21:10:19,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 21:10:19,783 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-09-03 21:10:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:10:19,798 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2019-09-03 21:10:19,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 21:10:19,800 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 21:10:19,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:10:19,809 INFO L225 Difference]: With dead ends: 20 [2019-09-03 21:10:19,810 INFO L226 Difference]: Without dead ends: 15 [2019-09-03 21:10:19,812 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 21:10:19,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-03 21:10:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-03 21:10:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-03 21:10:19,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-09-03 21:10:19,853 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-09-03 21:10:19,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:10:19,853 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-09-03 21:10:19,854 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 21:10:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-09-03 21:10:19,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 21:10:19,854 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:10:19,855 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:10:19,855 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:10:19,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:10:19,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1704941753, now seen corresponding path program 1 times [2019-09-03 21:10:19,856 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:10:19,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:10:19,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:10:19,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:10:19,858 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:10:19,863 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:10:19,864 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:10:19,864 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) [2019-09-03 21:10:19,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:10:19,885 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:10:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:10:19,898 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-03 21:10:19,899 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 21:10:19,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:10:19,899 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 21:10:19,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:10:19,916 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:10:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:10:19,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-03 21:10:19,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:10:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:10:20,049 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:10:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:10:20,107 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:10:20,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-03 21:10:20,108 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:10:20,108 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 21:10:20,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 21:10:20,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-03 21:10:20,110 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2019-09-03 21:10:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:10:20,184 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-09-03 21:10:20,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 21:10:20,185 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 21:10:20,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:10:20,186 INFO L225 Difference]: With dead ends: 23 [2019-09-03 21:10:20,187 INFO L226 Difference]: Without dead ends: 22 [2019-09-03 21:10:20,188 INFO L628 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 [2019-09-03 21:10:20,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-03 21:10:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-03 21:10:20,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-03 21:10:20,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-09-03 21:10:20,195 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2019-09-03 21:10:20,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:10:20,196 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-09-03 21:10:20,196 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 21:10:20,196 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-09-03 21:10:20,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-03 21:10:20,197 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:10:20,197 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:10:20,198 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:10:20,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:10:20,199 INFO L82 PathProgramCache]: Analyzing trace with hash 241116926, now seen corresponding path program 1 times [2019-09-03 21:10:20,199 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:10:20,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:10:20,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:10:20,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:10:20,201 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:10:20,204 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:10:20,205 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:10:20,205 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:10:20,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:10:20,221 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:10:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:10:20,233 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2019-09-03 21:10:20,235 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [26], [29], [31], [34], [36], [37], [38], [39], [41], [42] [2019-09-03 21:10:20,279 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:10:20,280 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:10:20,355 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.UnsupportedOperationException: todo: implement more comprehensive to_real at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:391) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.handleInfeasibleCase(BaseRefinementStrategy.java:296) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:206) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:453) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.UnsupportedOperationException: todo: implement more comprehensive to_real at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:235) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleReturnTransition(NonrelationalPostOperator.java:341) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:167) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$18(DisjunctiveAbstractState.java:328) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.crossProductCollection(DisjunctiveAbstractState.java:496) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:328) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:243) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:222) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.constructInterpolantGenerator(BaseTaipanRefinementStrategy.java:382) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getInterpolantGenerator(BaseTaipanRefinementStrategy.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:380) ... 20 more [2019-09-03 21:10:20,364 INFO L168 Benchmark]: Toolchain (without parser) took 1471.13 ms. Allocated memory was 133.2 MB in the beginning and 200.3 MB in the end (delta: 67.1 MB). Free memory was 88.0 MB in the beginning and 113.6 MB in the end (delta: -25.6 MB). Peak memory consumption was 41.6 MB. Max. memory is 7.1 GB. [2019-09-03 21:10:20,365 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 133.2 MB. Free memory was 106.2 MB in the beginning and 105.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 21:10:20,367 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.68 ms. Allocated memory is still 133.2 MB. Free memory was 87.6 MB in the beginning and 78.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-09-03 21:10:20,369 INFO L168 Benchmark]: Boogie Preprocessor took 115.74 ms. Allocated memory was 133.2 MB in the beginning and 200.3 MB in the end (delta: 67.1 MB). Free memory was 78.2 MB in the beginning and 177.2 MB in the end (delta: -99.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-09-03 21:10:20,370 INFO L168 Benchmark]: RCFGBuilder took 211.16 ms. Allocated memory is still 200.3 MB. Free memory was 176.6 MB in the beginning and 165.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-09-03 21:10:20,372 INFO L168 Benchmark]: TraceAbstraction took 854.76 ms. Allocated memory is still 200.3 MB. Free memory was 165.0 MB in the beginning and 113.6 MB in the end (delta: 51.5 MB). Peak memory consumption was 51.5 MB. Max. memory is 7.1 GB. [2019-09-03 21:10:20,381 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 133.2 MB. Free memory was 106.2 MB in the beginning and 105.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 285.68 ms. Allocated memory is still 133.2 MB. Free memory was 87.6 MB in the beginning and 78.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.74 ms. Allocated memory was 133.2 MB in the beginning and 200.3 MB in the end (delta: 67.1 MB). Free memory was 78.2 MB in the beginning and 177.2 MB in the end (delta: -99.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 211.16 ms. Allocated memory is still 200.3 MB. Free memory was 176.6 MB in the beginning and 165.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 854.76 ms. Allocated memory is still 200.3 MB. Free memory was 165.0 MB in the beginning and 113.6 MB in the end (delta: 51.5 MB). Peak memory consumption was 51.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.UnsupportedOperationException: todo: implement more comprehensive to_real de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.UnsupportedOperationException: todo: implement more comprehensive to_real: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:391) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...