/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/McCarthy91-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 20:15:56,163 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 20:15:56,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:15:56,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:15:56,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:15:56,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:15:56,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:15:56,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:15:56,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:15:56,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:15:56,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:15:56,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:15:56,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:15:56,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:15:56,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:15:56,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:15:56,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:15:56,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:15:56,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:15:56,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:15:56,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:15:56,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:15:56,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 20:15:56,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:15:56,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:15:56,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:15:56,289 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 [2020-08-18 20:15:56,314 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:15:56,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:15:56,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:15:56,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:15:56,316 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:15:56,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:15:56,316 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:15:56,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:15:56,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:15:56,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:15:56,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:15:56,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:15:56,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:15:56,318 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:15:56,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:15:56,318 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:15:56,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:15:56,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:15:56,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:15:56,319 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:15:56,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:15:56,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:15:56,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:15:56,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:15:56,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:15:56,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:15:56,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:15:56,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:15:56,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:15:56,321 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=5;interpolation-heuristic=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:15:56,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:15:56,631 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:15:56,635 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:15:56,637 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:15:56,638 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:15:56,639 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-08-18 20:15:56,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/981f83898/7782525ad011410b8b91165f57d18e7a/FLAG521ae46a8 [2020-08-18 20:15:57,181 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:15:57,181 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/McCarthy91-2.c [2020-08-18 20:15:57,189 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/981f83898/7782525ad011410b8b91165f57d18e7a/FLAG521ae46a8 [2020-08-18 20:15:57,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/981f83898/7782525ad011410b8b91165f57d18e7a [2020-08-18 20:15:57,550 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:15:57,552 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:15:57,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:15:57,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:15:57,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:15:57,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:15:57" (1/1) ... [2020-08-18 20:15:57,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d084142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:57, skipping insertion in model container [2020-08-18 20:15:57,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:15:57" (1/1) ... [2020-08-18 20:15:57,571 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:15:57,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:15:57,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:15:57,797 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:15:57,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:15:57,827 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:15:57,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:57 WrapperNode [2020-08-18 20:15:57,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:15:57,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:15:57,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:15:57,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:15:57,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:57" (1/1) ... [2020-08-18 20:15:57,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:57" (1/1) ... [2020-08-18 20:15:57,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:57" (1/1) ... [2020-08-18 20:15:57,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:57" (1/1) ... [2020-08-18 20:15:57,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:57" (1/1) ... [2020-08-18 20:15:57,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:57" (1/1) ... [2020-08-18 20:15:57,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:57" (1/1) ... [2020-08-18 20:15:57,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:15:57,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:15:57,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:15:57,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:15:57,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:57" (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 [2020-08-18 20:15:58,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:15:58,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:15:58,003 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2020-08-18 20:15:58,003 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:15:58,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:15:58,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 20:15:58,004 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2020-08-18 20:15:58,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:15:58,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:15:58,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:15:58,175 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:15:58,176 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 20:15:58,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:15:58 BoogieIcfgContainer [2020-08-18 20:15:58,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:15:58,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:15:58,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:15:58,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:15:58,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:15:57" (1/3) ... [2020-08-18 20:15:58,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eedf82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:15:58, skipping insertion in model container [2020-08-18 20:15:58,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:15:57" (2/3) ... [2020-08-18 20:15:58,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eedf82d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:15:58, skipping insertion in model container [2020-08-18 20:15:58,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:15:58" (3/3) ... [2020-08-18 20:15:58,189 INFO L109 eAbstractionObserver]: Analyzing ICFG McCarthy91-2.c [2020-08-18 20:15:58,199 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:15:58,206 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:15:58,221 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:15:58,245 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:15:58,246 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:15:58,246 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:15:58,246 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:15:58,246 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:15:58,246 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:15:58,246 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:15:58,247 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:15:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-08-18 20:15:58,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 20:15:58,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:15:58,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:15:58,269 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:15:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:15:58,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1590359645, now seen corresponding path program 1 times [2020-08-18 20:15:58,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:15:58,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610560727] [2020-08-18 20:15:58,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:15:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:15:58,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:15:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:15:58,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:15:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:15:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:15:58,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610560727] [2020-08-18 20:15:58,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:15:58,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 20:15:58,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073887300] [2020-08-18 20:15:58,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 20:15:58,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:15:58,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 20:15:58,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 20:15:58,721 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-08-18 20:15:58,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:15:58,921 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-08-18 20:15:58,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 20:15:58,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-08-18 20:15:58,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:15:58,935 INFO L225 Difference]: With dead ends: 34 [2020-08-18 20:15:58,936 INFO L226 Difference]: Without dead ends: 20 [2020-08-18 20:15:58,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:15:58,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-18 20:15:58,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-08-18 20:15:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 20:15:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-08-18 20:15:58,981 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2020-08-18 20:15:58,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:15:58,982 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-08-18 20:15:58,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 20:15:58,982 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-08-18 20:15:58,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 20:15:58,985 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:15:58,985 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:15:58,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:15:58,986 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:15:58,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:15:58,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2121223720, now seen corresponding path program 1 times [2020-08-18 20:15:58,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:15:58,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544312683] [2020-08-18 20:15:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:15:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:15:59,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:15:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:15:59,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 20:15:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:15:59,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 20:15:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:15:59,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 20:15:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:15:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-18 20:15:59,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544312683] [2020-08-18 20:15:59,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:15:59,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 20:15:59,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503742451] [2020-08-18 20:15:59,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 20:15:59,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:15:59,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 20:15:59,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-18 20:15:59,276 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 11 states. [2020-08-18 20:15:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:15:59,469 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-08-18 20:15:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 20:15:59,470 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-08-18 20:15:59,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:15:59,471 INFO L225 Difference]: With dead ends: 20 [2020-08-18 20:15:59,471 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 20:15:59,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-08-18 20:15:59,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 20:15:59,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 20:15:59,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 20:15:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 20:15:59,493 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-18 20:15:59,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:15:59,493 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 20:15:59,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 20:15:59,493 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 20:15:59,494 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 20:15:59,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:15:59,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 20:15:59,566 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 20:15:59,566 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:15:59,566 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:15:59,566 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 20:15:59,567 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 20:15:59,567 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 20:15:59,567 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 30) no Hoare annotation was computed. [2020-08-18 20:15:59,567 INFO L268 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-08-18 20:15:59,567 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 24 32) the Hoare annotation is: true [2020-08-18 20:15:59,567 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 24 32) no Hoare annotation was computed. [2020-08-18 20:15:59,568 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-08-18 20:15:59,568 INFO L271 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-08-18 20:15:59,569 INFO L268 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-08-18 20:15:59,569 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 24 32) no Hoare annotation was computed. [2020-08-18 20:15:59,570 INFO L264 CegarLoopResult]: At program point L19-2(line 19) the Hoare annotation is: (and (<= f91_~x 100) (= f91_~x |f91_#in~x|) (<= |f91_#t~ret0| 101)) [2020-08-18 20:15:59,570 INFO L268 CegarLoopResult]: For program point L16(lines 16 20) no Hoare annotation was computed. [2020-08-18 20:15:59,570 INFO L268 CegarLoopResult]: For program point L19-3(line 19) no Hoare annotation was computed. [2020-08-18 20:15:59,570 INFO L271 CegarLoopResult]: At program point f91ENTRY(lines 15 21) the Hoare annotation is: true [2020-08-18 20:15:59,572 INFO L268 CegarLoopResult]: For program point f91FINAL(lines 15 21) no Hoare annotation was computed. [2020-08-18 20:15:59,572 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (<= f91_~x 100) (= f91_~x |f91_#in~x|)) [2020-08-18 20:15:59,572 INFO L268 CegarLoopResult]: For program point f91EXIT(lines 15 21) no Hoare annotation was computed. [2020-08-18 20:15:59,573 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-08-18 20:15:59,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:15:59 BoogieIcfgContainer [2020-08-18 20:15:59,583 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 20:15:59,588 INFO L168 Benchmark]: Toolchain (without parser) took 2034.95 ms. Allocated memory was 138.9 MB in the beginning and 233.8 MB in the end (delta: 94.9 MB). Free memory was 102.5 MB in the beginning and 198.6 MB in the end (delta: -96.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 20:15:59,591 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 20:15:59,592 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.29 ms. Allocated memory is still 138.9 MB. Free memory was 102.3 MB in the beginning and 92.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-18 20:15:59,593 INFO L168 Benchmark]: Boogie Preprocessor took 27.15 ms. Allocated memory is still 138.9 MB. Free memory was 92.9 MB in the beginning and 91.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-18 20:15:59,595 INFO L168 Benchmark]: RCFGBuilder took 323.86 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.5 MB in the beginning and 169.3 MB in the end (delta: -77.8 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-18 20:15:59,597 INFO L168 Benchmark]: TraceAbstraction took 1401.85 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 168.7 MB in the beginning and 198.6 MB in the end (delta: -30.0 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-08-18 20:15:59,609 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.29 ms. Allocated memory is still 138.9 MB. Free memory was 102.3 MB in the beginning and 92.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.15 ms. Allocated memory is still 138.9 MB. Free memory was 92.9 MB in the beginning and 91.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 323.86 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 91.5 MB in the beginning and 169.3 MB in the end (delta: -77.8 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1401.85 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 168.7 MB in the beginning and 198.6 MB in the end (delta: -30.0 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 30]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 3, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 15 SDslu, 110 SDs, 0 SdLazy, 130 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 23 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 2904 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 8/12 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...