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/freire2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 21:10:22,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 21:10:22,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 21:10:22,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 21:10:22,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 21:10:22,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 21:10:22,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 21:10:22,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 21:10:22,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 21:10:22,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 21:10:22,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 21:10:22,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-09-03 21:10:22,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 21:10:22,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 21:10:22,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 21:10:22,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 21:10:22,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 21:10:22,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 21:10:22,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 21:10:22,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... 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[2019-09-03 21:10:22,850 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 21:10:22,869 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 21:10:22,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 21:10:22,874 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 21:10:22,874 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 21:10:22,875 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 21:10:22,875 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 21:10:22,875 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 21:10:22,876 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 21:10:22,876 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 21:10:22,876 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 21:10:22,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 21:10:22,877 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 21:10:22,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 21:10:22,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 21:10:22,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 21:10:22,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 21:10:22,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 21:10:22,879 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 21:10:22,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 21:10:22,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 21:10:22,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 21:10:22,880 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 21:10:22,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 21:10:22,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 21:10:22,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 21:10:22,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 21:10:22,882 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 21:10:22,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 21:10:22,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 21:10:22,882 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 21:10:22,938 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 21:10:22,950 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 21:10:22,954 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 21:10:22,956 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 21:10:22,956 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 21:10:22,957 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/freire2.c [2019-09-03 21:10:23,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0001bd759/f8d7a06eb91e421cb8794a30df9b0fb7/FLAG1b509a255 [2019-09-03 21:10:23,477 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 21:10:23,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/freire2.c [2019-09-03 21:10:23,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0001bd759/f8d7a06eb91e421cb8794a30df9b0fb7/FLAG1b509a255 [2019-09-03 21:10:23,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0001bd759/f8d7a06eb91e421cb8794a30df9b0fb7 [2019-09-03 21:10:23,838 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 21:10:23,840 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 21:10:23,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 21:10:23,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 21:10:23,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 21:10:23,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:10:23" (1/1) ... [2019-09-03 21:10:23,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2816fe35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:23, skipping insertion in model container [2019-09-03 21:10:23,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:10:23" (1/1) ... [2019-09-03 21:10:23,856 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 21:10:23,876 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 21:10:24,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:10:24,075 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 21:10:24,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:10:24,202 INFO L192 MainTranslator]: Completed translation [2019-09-03 21:10:24,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:24 WrapperNode [2019-09-03 21:10:24,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 21:10:24,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 21:10:24,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 21:10:24,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 21:10:24,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:24" (1/1) ... [2019-09-03 21:10:24,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:24" (1/1) ... [2019-09-03 21:10:24,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:24" (1/1) ... [2019-09-03 21:10:24,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:24" (1/1) ... [2019-09-03 21:10:24,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:24" (1/1) ... [2019-09-03 21:10:24,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:24" (1/1) ... [2019-09-03 21:10:24,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:24" (1/1) ... [2019-09-03 21:10:24,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 21:10:24,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 21:10:24,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 21:10:24,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 21:10:24,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 21:10:24,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 21:10:24,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 21:10:24,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 21:10:24,296 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 21:10:24,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 21:10:24,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2019-09-03 21:10:24,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 21:10:24,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 21:10:24,297 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 21:10:24,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 21:10:24,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 21:10:24,470 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 21:10:24,471 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 21:10:24,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:10:24 BoogieIcfgContainer [2019-09-03 21:10:24,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 21:10:24,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 21:10:24,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 21:10:24,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 21:10:24,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 09:10:23" (1/3) ... [2019-09-03 21:10:24,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4513b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 09:10:24, skipping insertion in model container [2019-09-03 21:10:24,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:10:24" (2/3) ... [2019-09-03 21:10:24,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4513b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 09:10:24, skipping insertion in model container [2019-09-03 21:10:24,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:10:24" (3/3) ... [2019-09-03 21:10:24,483 INFO L109 eAbstractionObserver]: Analyzing ICFG freire2.c [2019-09-03 21:10:24,502 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 21:10:24,510 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 21:10:24,547 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 21:10:24,602 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 21:10:24,602 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 21:10:24,605 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 21:10:24,605 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 21:10:24,606 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 21:10:24,606 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 21:10:24,606 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 21:10:24,606 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 21:10:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-09-03 21:10:24,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 21:10:24,639 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:10:24,639 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:10:24,641 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:10:24,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:10:24,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1435220999, now seen corresponding path program 1 times [2019-09-03 21:10:24,648 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:10:24,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:10:24,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:10:24,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:10:24,686 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:10:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:10:24,746 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 21:10:24,749 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:10:24,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 21:10:24,750 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:10:24,755 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 21:10:24,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 21:10:24,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 21:10:24,774 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2019-09-03 21:10:24,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:10:24,791 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2019-09-03 21:10:24,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 21:10:24,792 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 21:10:24,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:10:24,801 INFO L225 Difference]: With dead ends: 24 [2019-09-03 21:10:24,801 INFO L226 Difference]: Without dead ends: 19 [2019-09-03 21:10:24,803 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 21:10:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-03 21:10:24,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-09-03 21:10:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-03 21:10:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-09-03 21:10:24,847 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2019-09-03 21:10:24,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:10:24,847 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-09-03 21:10:24,848 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 21:10:24,848 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-09-03 21:10:24,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 21:10:24,848 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:10:24,849 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:10:24,849 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:10:24,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:10:24,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1444634955, now seen corresponding path program 1 times [2019-09-03 21:10:24,850 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:10:24,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:10:24,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:10:24,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:10:24,851 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:10:24,867 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:10:24,868 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:10:24,868 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:10:24,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:10:24,883 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:10:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:10:24,896 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-03 21:10:24,897 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 21:10:24,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:10:24,900 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:10:24,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:10:24,916 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:10:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:10:24,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-03 21:10:24,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:10:25,036 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 21:10:25,036 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:10:25,101 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 21:10:25,109 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:10:25,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-03 21:10:25,111 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:10:25,112 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 21:10:25,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 21:10:25,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-03 21:10:25,114 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2019-09-03 21:10:25,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:10:25,209 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2019-09-03 21:10:25,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 21:10:25,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 21:10:25,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:10:25,211 INFO L225 Difference]: With dead ends: 31 [2019-09-03 21:10:25,211 INFO L226 Difference]: Without dead ends: 31 [2019-09-03 21:10:25,212 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-03 21:10:25,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-03 21:10:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-09-03 21:10:25,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-03 21:10:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2019-09-03 21:10:25,227 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 10 [2019-09-03 21:10:25,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:10:25,228 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2019-09-03 21:10:25,229 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 21:10:25,229 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2019-09-03 21:10:25,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-03 21:10:25,230 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:10:25,230 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:10:25,231 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:10:25,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:10:25,232 INFO L82 PathProgramCache]: Analyzing trace with hash -892290774, now seen corresponding path program 1 times [2019-09-03 21:10:25,232 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:10:25,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:10:25,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:10:25,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:10:25,236 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:10:25,245 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:10:25,245 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:10:25,245 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 21:10:25,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:10:25,257 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:10:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:10:25,281 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2019-09-03 21:10:25,283 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [30], [33], [35], [38], [40], [41], [42], [43], [45], [46], [47] [2019-09-03 21:10:25,314 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:10:25,314 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:10:25,398 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: unknown symbol (to_int Real Int) 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.IllegalArgumentException: unknown symbol (to_int Real Int) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:238) 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 21:10:25,404 INFO L168 Benchmark]: Toolchain (without parser) took 1563.70 ms. Allocated memory was 140.0 MB in the beginning and 199.8 MB in the end (delta: 59.8 MB). Free memory was 87.3 MB in the beginning and 109.7 MB in the end (delta: -22.4 MB). Peak memory consumption was 37.4 MB. Max. memory is 7.1 GB. [2019-09-03 21:10:25,406 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 106.1 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 21:10:25,409 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.92 ms. Allocated memory was 140.0 MB in the beginning and 199.8 MB in the end (delta: 59.8 MB). Free memory was 87.1 MB in the beginning and 177.4 MB in the end (delta: -90.3 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2019-09-03 21:10:25,409 INFO L168 Benchmark]: Boogie Preprocessor took 36.47 ms. Allocated memory is still 199.8 MB. Free memory was 177.4 MB in the beginning and 175.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2019-09-03 21:10:25,410 INFO L168 Benchmark]: RCFGBuilder took 232.56 ms. Allocated memory is still 199.8 MB. Free memory was 175.2 MB in the beginning and 163.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-09-03 21:10:25,412 INFO L168 Benchmark]: TraceAbstraction took 928.52 ms. Allocated memory is still 199.8 MB. Free memory was 163.3 MB in the beginning and 109.7 MB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. [2019-09-03 21:10:25,416 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 106.1 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 361.92 ms. Allocated memory was 140.0 MB in the beginning and 199.8 MB in the end (delta: 59.8 MB). Free memory was 87.1 MB in the beginning and 177.4 MB in the end (delta: -90.3 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.47 ms. Allocated memory is still 199.8 MB. Free memory was 177.4 MB in the beginning and 175.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 232.56 ms. Allocated memory is still 199.8 MB. Free memory was 175.2 MB in the beginning and 163.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 928.52 ms. Allocated memory is still 199.8 MB. Free memory was 163.3 MB in the beginning and 109.7 MB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: unknown symbol (to_int Real Int) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: unknown symbol (to_int Real Int): 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...