/usr/bin/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test27-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:10:47,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:10:47,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:10:47,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:10:47,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:10:47,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:10:47,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:10:47,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:10:47,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:10:47,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:10:47,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:10:47,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:10:47,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:10:47,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:10:47,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:10:47,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:10:47,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:10:47,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:10:47,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:10:47,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:10:47,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:10:47,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:10:47,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:10:47,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:10:47,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 21:10:47,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:10:47,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:10:47,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:10:47,775 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 21:10:47,789 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:10:47,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:10:47,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:10:47,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:10:47,791 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:10:47,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:10:47,793 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:10:47,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:10:47,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:10:47,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:10:47,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:10:47,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:10:47,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:10:47,794 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:10:47,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:10:47,794 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:10:47,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:10:47,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:10:47,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:10:47,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:10:47,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:10:47,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:10:47,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:10:47,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:10:47,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:10:47,798 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:10:47,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:10:47,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:10:47,799 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:10:48,068 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:10:48,082 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:10:48,087 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:10:48,089 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:10:48,090 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:10:48,091 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test27-1.c [2019-11-06 21:10:48,170 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d502b901f/8f6a7935fe19437bbdb65ad26dd7cae5/FLAG5f29e1cf8 [2019-11-06 21:10:48,667 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:10:48,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test27-1.c [2019-11-06 21:10:48,678 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d502b901f/8f6a7935fe19437bbdb65ad26dd7cae5/FLAG5f29e1cf8 [2019-11-06 21:10:49,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d502b901f/8f6a7935fe19437bbdb65ad26dd7cae5 [2019-11-06 21:10:49,050 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:10:49,052 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:10:49,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:10:49,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:10:49,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:10:49,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:10:49" (1/1) ... [2019-11-06 21:10:49,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7076498d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:49, skipping insertion in model container [2019-11-06 21:10:49,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:10:49" (1/1) ... [2019-11-06 21:10:49,068 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:10:49,086 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:10:49,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:10:49,280 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:10:49,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:10:49,406 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:10:49,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:49 WrapperNode [2019-11-06 21:10:49,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:10:49,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:10:49,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:10:49,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:10:49,418 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:49" (1/1) ... [2019-11-06 21:10:49,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:49" (1/1) ... [2019-11-06 21:10:49,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:49" (1/1) ... [2019-11-06 21:10:49,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:49" (1/1) ... [2019-11-06 21:10:49,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:49" (1/1) ... [2019-11-06 21:10:49,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:49" (1/1) ... [2019-11-06 21:10:49,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:49" (1/1) ... [2019-11-06 21:10:49,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:10:49,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:10:49,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:10:49,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:10:49,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:49" (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 [2019-11-06 21:10:49,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:10:49,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:10:49,505 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-11-06 21:10:49,505 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:10:49,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:10:49,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 21:10:49,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-11-06 21:10:49,506 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-11-06 21:10:49,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-06 21:10:49,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 21:10:49,506 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:10:49,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 21:10:49,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 21:10:49,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-06 21:10:49,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 21:10:49,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:10:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:10:49,859 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:10:49,860 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-06 21:10:49,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:10:49 BoogieIcfgContainer [2019-11-06 21:10:49,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:10:49,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:10:49,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:10:49,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:10:49,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:10:49" (1/3) ... [2019-11-06 21:10:49,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab69089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:10:49, skipping insertion in model container [2019-11-06 21:10:49,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:10:49" (2/3) ... [2019-11-06 21:10:49,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab69089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:10:49, skipping insertion in model container [2019-11-06 21:10:49,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:10:49" (3/3) ... [2019-11-06 21:10:49,869 INFO L109 eAbstractionObserver]: Analyzing ICFG test27-1.c [2019-11-06 21:10:49,883 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:10:49,891 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:10:49,903 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:10:49,941 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:10:49,941 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:10:49,941 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:10:49,941 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:10:49,941 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:10:49,942 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:10:49,942 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:10:49,942 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:10:49,958 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-06 21:10:49,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 21:10:49,964 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:10:49,966 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:10:49,968 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:10:49,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:10:49,973 INFO L82 PathProgramCache]: Analyzing trace with hash 63236786, now seen corresponding path program 1 times [2019-11-06 21:10:49,981 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:10:49,981 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729667641] [2019-11-06 21:10:49,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:10:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:10:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:10:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:10:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:10:50,229 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729667641] [2019-11-06 21:10:50,233 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:10:50,234 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 21:10:50,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564049183] [2019-11-06 21:10:50,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 21:10:50,251 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:10:50,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 21:10:50,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:10:50,271 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2019-11-06 21:10:50,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:10:50,414 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2019-11-06 21:10:50,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 21:10:50,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-06 21:10:50,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:10:50,426 INFO L225 Difference]: With dead ends: 42 [2019-11-06 21:10:50,427 INFO L226 Difference]: Without dead ends: 20 [2019-11-06 21:10:50,431 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:10:50,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-06 21:10:50,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-06 21:10:50,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-06 21:10:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-06 21:10:50,473 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2019-11-06 21:10:50,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:10:50,476 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-06 21:10:50,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 21:10:50,477 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-06 21:10:50,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 21:10:50,479 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:10:50,479 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:10:50,480 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:10:50,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:10:50,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1428873564, now seen corresponding path program 1 times [2019-11-06 21:10:50,481 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:10:50,481 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30461093] [2019-11-06 21:10:50,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:10:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:10:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:10:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:10:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:10:50,615 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30461093] [2019-11-06 21:10:50,615 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:10:50,616 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 21:10:50,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374115554] [2019-11-06 21:10:50,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:10:50,618 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:10:50,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:10:50,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:10:50,619 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2019-11-06 21:10:50,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:10:50,703 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-11-06 21:10:50,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 21:10:50,704 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-11-06 21:10:50,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:10:50,705 INFO L225 Difference]: With dead ends: 34 [2019-11-06 21:10:50,705 INFO L226 Difference]: Without dead ends: 22 [2019-11-06 21:10:50,706 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:10:50,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-06 21:10:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-11-06 21:10:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-06 21:10:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-11-06 21:10:50,712 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2019-11-06 21:10:50,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:10:50,713 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-11-06 21:10:50,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:10:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-11-06 21:10:50,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 21:10:50,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:10:50,714 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:10:50,714 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:10:50,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:10:50,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2015026266, now seen corresponding path program 1 times [2019-11-06 21:10:50,715 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:10:50,715 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81956287] [2019-11-06 21:10:50,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:10:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:10:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:10:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:10:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:10:50,828 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81956287] [2019-11-06 21:10:50,829 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895456360] [2019-11-06 21:10:50,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 21:10:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:10:50,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 21:10:50,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:10:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:10:50,991 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:10:50,991 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 21:10:50,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855431499] [2019-11-06 21:10:50,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:10:50,992 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:10:50,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:10:50,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:10:50,993 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2019-11-06 21:10:51,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:10:51,100 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-06 21:10:51,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:10:51,101 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-06 21:10:51,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:10:51,101 INFO L225 Difference]: With dead ends: 36 [2019-11-06 21:10:51,102 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 21:10:51,102 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:10:51,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 21:10:51,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-11-06 21:10:51,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-06 21:10:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-06 21:10:51,108 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2019-11-06 21:10:51,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:10:51,108 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-06 21:10:51,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:10:51,109 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-06 21:10:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 21:10:51,109 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:10:51,110 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:10:51,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:10:51,314 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:10:51,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:10:51,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1627910184, now seen corresponding path program 2 times [2019-11-06 21:10:51,314 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:10:51,314 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337831798] [2019-11-06 21:10:51,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:10:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:10:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:10:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:10:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:10:51,415 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337831798] [2019-11-06 21:10:51,415 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101269731] [2019-11-06 21:10:51,415 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:10:51,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-06 21:10:51,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:10:51,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 21:10:51,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:10:51,680 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2019-11-06 21:10:51,681 INFO L341 Elim1Store]: treesize reduction 28, result has 77.2 percent of original size [2019-11-06 21:10:51,682 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 102 [2019-11-06 21:10:51,683 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:10:51,825 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-11-06 21:10:51,825 INFO L567 ElimStorePlain]: treesize reduction 42, result has 84.6 percent of original size [2019-11-06 21:10:51,961 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2019-11-06 21:10:51,961 INFO L341 Elim1Store]: treesize reduction 28, result has 78.8 percent of original size [2019-11-06 21:10:51,962 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 113 [2019-11-06 21:10:51,965 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:10:52,104 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-11-06 21:10:52,105 INFO L567 ElimStorePlain]: treesize reduction 46, result has 81.7 percent of original size [2019-11-06 21:10:52,107 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:52,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:52,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 21:10:52,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 21:10:52,132 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:52,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:52,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:52,152 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:52,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:52,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 21:10:52,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:52,168 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:52,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:52,175 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: 8 dim-0 vars, and 6 xjuncts. [2019-11-06 21:10:52,176 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:241, output treesize:1533 [2019-11-06 21:10:52,177 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:54,732 WARN L191 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 167 DAG size of output: 32 [2019-11-06 21:10:54,807 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:10:54,808 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 125 [2019-11-06 21:10:54,810 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:54,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:54,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:54,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:54,825 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:54,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:54,833 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:54,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:54,835 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:54,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:54,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:54,844 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:10:54,849 INFO L496 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-06 21:10:54,900 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:10:55,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:10:55,103 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:178) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:83) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:294) ... 21 more [2019-11-06 21:10:55,108 INFO L168 Benchmark]: Toolchain (without parser) took 6056.58 ms. Allocated memory was 137.9 MB in the beginning and 234.4 MB in the end (delta: 96.5 MB). Free memory was 101.4 MB in the beginning and 79.5 MB in the end (delta: 21.9 MB). Peak memory consumption was 118.4 MB. Max. memory is 7.1 GB. [2019-11-06 21:10:55,109 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 137.9 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-11-06 21:10:55,110 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.49 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 101.0 MB in the beginning and 180.4 MB in the end (delta: -79.4 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2019-11-06 21:10:55,111 INFO L168 Benchmark]: Boogie Preprocessor took 40.32 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 178.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-11-06 21:10:55,112 INFO L168 Benchmark]: RCFGBuilder took 413.44 ms. Allocated memory is still 202.4 MB. Free memory was 178.4 MB in the beginning and 159.3 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2019-11-06 21:10:55,113 INFO L168 Benchmark]: TraceAbstraction took 5243.85 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 158.6 MB in the beginning and 79.5 MB in the end (delta: 79.1 MB). Peak memory consumption was 111.1 MB. Max. memory is 7.1 GB. [2019-11-06 21:10:55,126 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 137.9 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 354.49 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 101.0 MB in the beginning and 180.4 MB in the end (delta: -79.4 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 40.32 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 178.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 413.44 ms. Allocated memory is still 202.4 MB. Free memory was 178.4 MB in the beginning and 159.3 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5243.85 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 158.6 MB in the beginning and 79.5 MB in the end (delta: 79.1 MB). Peak memory consumption was 111.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:302) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...