/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/terminator_02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:16:02,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:16:02,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:16:02,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:16:02,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:16:02,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:16:02,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:16:02,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:16:02,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:16:02,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:16:02,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:16:02,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:16:02,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:16:02,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:16:02,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:16:02,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:16:02,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:16:02,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:16:02,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:16:02,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:16:02,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:16:02,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:16:02,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:16:02,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:16:02,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 18:16:02,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:16:02,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:16:02,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:16:02,221 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 18:16:02,264 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:16:02,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:16:02,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:16:02,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:16:02,266 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:16:02,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:16:02,272 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:16:02,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:16:02,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:16:02,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:16:02,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:16:02,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:16:02,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:16:02,274 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:16:02,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:16:02,274 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:16:02,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:16:02,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:16:02,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:16:02,278 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:16:02,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:16:02,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:16:02,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:16:02,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:16:02,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:16:02,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:16:02,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:16:02,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:16:02,281 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:16:02,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:16:02,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:16:02,629 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:16:02,632 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:16:02,634 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:16:02,634 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:16:02,635 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_02-2.c [2020-08-21 18:16:02,711 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71dfd314f/a2d22241d2be49f8b2d598459786d317/FLAG92943b0ed [2020-08-21 18:16:03,150 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:16:03,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/terminator_02-2.c [2020-08-21 18:16:03,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71dfd314f/a2d22241d2be49f8b2d598459786d317/FLAG92943b0ed [2020-08-21 18:16:03,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71dfd314f/a2d22241d2be49f8b2d598459786d317 [2020-08-21 18:16:03,531 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:16:03,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:16:03,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:16:03,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:16:03,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:16:03,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7438b5a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03, skipping insertion in model container [2020-08-21 18:16:03,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:16:03,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:16:03,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:16:03,756 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:16:03,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:16:03,790 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:16:03,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03 WrapperNode [2020-08-21 18:16:03,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:16:03,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:16:03,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:16:03,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:16:03,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (1/1) ... [2020-08-21 18:16:03,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:16:03,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:16:03,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:16:03,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:16:03,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 18:16:03,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:16:03,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:16:03,981 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 18:16:03,981 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 18:16:03,981 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:16:03,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:16:03,982 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 18:16:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 18:16:03,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 18:16:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:16:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 18:16:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:16:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:16:03,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:16:04,196 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:16:04,196 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 18:16:04,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:16:04 BoogieIcfgContainer [2020-08-21 18:16:04,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:16:04,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:16:04,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:16:04,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:16:04,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:16:03" (1/3) ... [2020-08-21 18:16:04,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c1bfb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:16:04, skipping insertion in model container [2020-08-21 18:16:04,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:03" (2/3) ... [2020-08-21 18:16:04,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65c1bfb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:16:04, skipping insertion in model container [2020-08-21 18:16:04,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:16:04" (3/3) ... [2020-08-21 18:16:04,210 INFO L109 eAbstractionObserver]: Analyzing ICFG terminator_02-2.c [2020-08-21 18:16:04,222 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:16:04,246 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:16:04,285 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:16:04,326 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:16:04,326 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:16:04,326 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:16:04,326 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:16:04,327 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:16:04,327 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:16:04,327 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:16:04,327 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:16:04,348 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-08-21 18:16:04,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 18:16:04,355 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:04,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:04,356 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:04,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:04,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1447361753, now seen corresponding path program 1 times [2020-08-21 18:16:04,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:04,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609749027] [2020-08-21 18:16:04,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:04,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:16:04,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609749027] [2020-08-21 18:16:04,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:16:04,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 18:16:04,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523096513] [2020-08-21 18:16:04,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:16:04,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:04,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:16:04,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:16:04,615 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2020-08-21 18:16:04,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:04,777 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-08-21 18:16:04,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:16:04,779 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-21 18:16:04,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:04,788 INFO L225 Difference]: With dead ends: 48 [2020-08-21 18:16:04,788 INFO L226 Difference]: Without dead ends: 17 [2020-08-21 18:16:04,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:16:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-21 18:16:04,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-08-21 18:16:04,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-21 18:16:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-08-21 18:16:04,832 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-08-21 18:16:04,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:04,833 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-08-21 18:16:04,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:16:04,833 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-08-21 18:16:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 18:16:04,834 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:04,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:04,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:16:04,835 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:04,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:04,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1757797730, now seen corresponding path program 1 times [2020-08-21 18:16:04,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:04,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583832846] [2020-08-21 18:16:04,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:04,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 18:16:04,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583832846] [2020-08-21 18:16:04,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:16:04,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:16:04,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369911742] [2020-08-21 18:16:04,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:16:04,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:04,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:16:04,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:16:04,937 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-08-21 18:16:04,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:04,968 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2020-08-21 18:16:04,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:16:04,968 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-21 18:16:04,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:04,969 INFO L225 Difference]: With dead ends: 17 [2020-08-21 18:16:04,969 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 18:16:04,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:16:04,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 18:16:04,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 18:16:04,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 18:16:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 18:16:04,972 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-08-21 18:16:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:04,972 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 18:16:04,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:16:04,973 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 18:16:04,973 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 18:16:04,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:16:04,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 18:16:05,011 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 18:16:05,011 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:16:05,011 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:16:05,012 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 18:16:05,012 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 18:16:05,012 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 18:16:05,012 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-08-21 18:16:05,013 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 18:16:05,013 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-08-21 18:16:05,013 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-08-21 18:16:05,013 INFO L268 CegarLoopResult]: For program point L27(lines 27 32) no Hoare annotation was computed. [2020-08-21 18:16:05,014 INFO L271 CegarLoopResult]: At program point L27-2(lines 24 33) the Hoare annotation is: true [2020-08-21 18:16:05,014 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 38) no Hoare annotation was computed. [2020-08-21 18:16:05,014 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-08-21 18:16:05,014 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-08-21 18:16:05,014 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 38) no Hoare annotation was computed. [2020-08-21 18:16:05,015 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 16 38) the Hoare annotation is: true [2020-08-21 18:16:05,015 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-08-21 18:16:05,015 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 33) the Hoare annotation is: (or (<= main_~z~0 100) (< 99 main_~x~0)) [2020-08-21 18:16:05,015 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-21 18:16:05,016 INFO L268 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-08-21 18:16:05,016 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-08-21 18:16:05,016 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-21 18:16:05,016 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-08-21 18:16:05,016 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-08-21 18:16:05,017 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-08-21 18:16:05,017 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-08-21 18:16:05,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:16:05 BoogieIcfgContainer [2020-08-21 18:16:05,028 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:16:05,031 INFO L168 Benchmark]: Toolchain (without parser) took 1497.75 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 103.6 MB in the beginning and 121.8 MB in the end (delta: -18.2 MB). Peak memory consumption was 37.4 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:05,032 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.4 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-21 18:16:05,033 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.12 ms. Allocated memory is still 147.3 MB. Free memory was 103.6 MB in the beginning and 93.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:05,034 INFO L168 Benchmark]: Boogie Preprocessor took 124.14 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.9 MB in the beginning and 182.5 MB in the end (delta: -88.6 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:05,035 INFO L168 Benchmark]: RCFGBuilder took 285.71 ms. Allocated memory is still 202.9 MB. Free memory was 182.5 MB in the beginning and 167.6 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:05,036 INFO L168 Benchmark]: TraceAbstraction took 825.56 ms. Allocated memory is still 202.9 MB. Free memory was 166.7 MB in the beginning and 121.8 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:05,040 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.4 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.12 ms. Allocated memory is still 147.3 MB. Free memory was 103.6 MB in the beginning and 93.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.14 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.9 MB in the beginning and 182.5 MB in the end (delta: -88.6 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 285.71 ms. Allocated memory is still 202.9 MB. Free memory was 182.5 MB in the beginning and 167.6 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 825.56 ms. Allocated memory is still 202.9 MB. Free memory was 166.7 MB in the beginning and 121.8 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 15 SDslu, 124 SDs, 0 SdLazy, 52 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 12 NumberOfFragments, 13 HoareAnnotationTreeSize, 9 FomulaSimplifications, 7 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 730 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...