/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=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/trex02-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 19:37:15,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 19:37:15,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 19:37:15,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 19:37:15,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 19:37:15,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 19:37:15,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 19:37:15,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 19:37:15,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 19:37:15,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 19:37:15,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 19:37:15,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 19:37:15,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 19:37:15,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 19:37:15,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 19:37:15,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 19:37:15,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 19:37:15,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 19:37:15,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 19:37:15,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 19:37:15,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 19:37:15,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 19:37:15,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 19:37:15,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 19:37:15,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 19:37:15,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:37:15,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:37:15,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:37:15,470 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 19:37:15,494 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:37:15,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:37:15,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:37:15,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:37:15,501 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:37:15,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:37:15,502 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:37:15,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:37:15,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:37:15,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:37:15,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:37:15,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:37:15,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:37:15,508 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:37:15,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:37:15,508 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:37:15,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:37:15,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:37:15,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:37:15,509 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:37:15,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:37:15,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:37:15,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:37:15,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:37:15,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:37:15,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:37:15,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:37:15,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:37:15,510 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:37:15,510 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=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:37:15,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:37:15,880 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:37:15,884 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:37:15,886 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:37:15,887 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:37:15,887 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-1.c [2020-08-18 19:37:15,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93991a0d2/86648412c61f4c50b0a3a7a4c550127c/FLAG75b6052e5 [2020-08-18 19:37:16,395 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:37:16,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/trex02-1.c [2020-08-18 19:37:16,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93991a0d2/86648412c61f4c50b0a3a7a4c550127c/FLAG75b6052e5 [2020-08-18 19:37:16,830 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93991a0d2/86648412c61f4c50b0a3a7a4c550127c [2020-08-18 19:37:16,839 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:37:16,841 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:37:16,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:37:16,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:37:16,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:37:16,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:37:16" (1/1) ... [2020-08-18 19:37:16,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@780fc4fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:16, skipping insertion in model container [2020-08-18 19:37:16,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:37:16" (1/1) ... [2020-08-18 19:37:16,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:37:16,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:37:17,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:37:17,105 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:37:17,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:37:17,129 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:37:17,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:17 WrapperNode [2020-08-18 19:37:17,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:37:17,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:37:17,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:37:17,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:37:17,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:17" (1/1) ... [2020-08-18 19:37:17,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:17" (1/1) ... [2020-08-18 19:37:17,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:17" (1/1) ... [2020-08-18 19:37:17,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:17" (1/1) ... [2020-08-18 19:37:17,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:17" (1/1) ... [2020-08-18 19:37:17,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:17" (1/1) ... [2020-08-18 19:37:17,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:17" (1/1) ... [2020-08-18 19:37:17,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:37:17,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:37:17,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:37:17,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:37:17,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:17" (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 19:37:17,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:37:17,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:37:17,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 19:37:17,290 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-08-18 19:37:17,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:37:17,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:37:17,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 19:37:17,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-18 19:37:17,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 19:37:17,291 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-08-18 19:37:17,291 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:37:17,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:37:17,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:37:17,486 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:37:17,486 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 19:37:17,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:37:17 BoogieIcfgContainer [2020-08-18 19:37:17,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:37:17,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:37:17,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:37:17,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:37:17,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:37:16" (1/3) ... [2020-08-18 19:37:17,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787cc388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:37:17, skipping insertion in model container [2020-08-18 19:37:17,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:37:17" (2/3) ... [2020-08-18 19:37:17,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787cc388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:37:17, skipping insertion in model container [2020-08-18 19:37:17,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:37:17" (3/3) ... [2020-08-18 19:37:17,498 INFO L109 eAbstractionObserver]: Analyzing ICFG trex02-1.c [2020-08-18 19:37:17,510 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:37:17,516 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:37:17,532 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:37:17,571 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:37:17,571 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:37:17,571 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:37:17,572 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:37:17,572 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:37:17,572 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:37:17,572 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:37:17,572 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:37:17,599 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-18 19:37:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 19:37:17,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:37:17,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:37:17,614 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:37:17,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:37:17,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1873481772, now seen corresponding path program 1 times [2020-08-18 19:37:17,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:37:17,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606589420] [2020-08-18 19:37:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:37:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:17,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:37:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:17,806 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 19:37:17,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606589420] [2020-08-18 19:37:17,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:37:17,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 19:37:17,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342607005] [2020-08-18 19:37:17,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 19:37:17,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:37:17,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 19:37:17,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:37:17,829 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-08-18 19:37:17,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:37:17,895 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-08-18 19:37:17,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:37:17,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-08-18 19:37:17,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:37:17,907 INFO L225 Difference]: With dead ends: 35 [2020-08-18 19:37:17,907 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 19:37:17,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 19:37:17,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 19:37:17,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 19:37:17,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 19:37:17,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-18 19:37:17,951 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2020-08-18 19:37:17,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:37:17,951 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-18 19:37:17,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 19:37:17,951 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-18 19:37:17,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 19:37:17,953 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:37:17,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:37:17,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:37:17,954 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:37:17,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:37:17,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1862399520, now seen corresponding path program 1 times [2020-08-18 19:37:17,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:37:17,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715252410] [2020-08-18 19:37:17,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:37:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:18,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:37:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:37:18,058 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 19:37:18,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715252410] [2020-08-18 19:37:18,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:37:18,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 19:37:18,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129676578] [2020-08-18 19:37:18,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 19:37:18,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:37:18,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 19:37:18,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 19:37:18,063 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2020-08-18 19:37:18,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:37:18,148 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2020-08-18 19:37:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 19:37:18,149 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-08-18 19:37:18,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:37:18,150 INFO L225 Difference]: With dead ends: 18 [2020-08-18 19:37:18,150 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 19:37:18,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-18 19:37:18,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 19:37:18,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 19:37:18,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 19:37:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 19:37:18,158 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-08-18 19:37:18,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:37:18,159 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 19:37:18,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 19:37:18,159 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 19:37:18,159 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 19:37:18,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:37:18,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 19:37:18,241 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 19:37:18,241 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~x~0 |old(~x~0)|) [2020-08-18 19:37:18,241 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 19:37:18,242 INFO L268 CegarLoopResult]: For program point fooEXIT(lines 15 17) no Hoare annotation was computed. [2020-08-18 19:37:18,242 INFO L264 CegarLoopResult]: At program point fooENTRY(lines 15 17) the Hoare annotation is: (= ~x~0 |old(~x~0)|) [2020-08-18 19:37:18,242 INFO L268 CegarLoopResult]: For program point fooFINAL(lines 15 17) no Hoare annotation was computed. [2020-08-18 19:37:18,242 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 19:37:18,242 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (<= ~x~0 0) [2020-08-18 19:37:18,243 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 19:37:18,243 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 19:37:18,243 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 19 27) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (<= |old(~x~0)| 0))) [2020-08-18 19:37:18,243 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 19 27) no Hoare annotation was computed. [2020-08-18 19:37:18,244 INFO L271 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: true [2020-08-18 19:37:18,244 INFO L268 CegarLoopResult]: For program point L23(lines 23 24) no Hoare annotation was computed. [2020-08-18 19:37:18,244 INFO L271 CegarLoopResult]: At program point L24-1(lines 21 25) the Hoare annotation is: true [2020-08-18 19:37:18,244 INFO L271 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: true [2020-08-18 19:37:18,245 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 25) the Hoare annotation is: (or (<= ~x~0 0) (not (<= |old(~x~0)| 0))) [2020-08-18 19:37:18,245 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 19 27) no Hoare annotation was computed. [2020-08-18 19:37:18,245 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-18 19:37:18,245 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-18 19:37:18,245 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-18 19:37:18,246 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-18 19:37:18,246 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-18 19:37:18,246 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-18 19:37:18,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 07:37:18 BoogieIcfgContainer [2020-08-18 19:37:18,258 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 19:37:18,261 INFO L168 Benchmark]: Toolchain (without parser) took 1419.08 ms. Allocated memory was 136.8 MB in the beginning and 199.2 MB in the end (delta: 62.4 MB). Free memory was 99.7 MB in the beginning and 121.2 MB in the end (delta: -21.5 MB). Peak memory consumption was 40.9 MB. Max. memory is 7.1 GB. [2020-08-18 19:37:18,262 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 136.8 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-18 19:37:18,263 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.84 ms. Allocated memory is still 136.8 MB. Free memory was 99.5 MB in the beginning and 90.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-18 19:37:18,264 INFO L168 Benchmark]: Boogie Preprocessor took 103.62 ms. Allocated memory was 136.8 MB in the beginning and 199.2 MB in the end (delta: 62.4 MB). Free memory was 90.1 MB in the beginning and 177.8 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-18 19:37:18,265 INFO L168 Benchmark]: RCFGBuilder took 255.69 ms. Allocated memory is still 199.2 MB. Free memory was 177.8 MB in the beginning and 165.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-18 19:37:18,266 INFO L168 Benchmark]: TraceAbstraction took 766.63 ms. Allocated memory is still 199.2 MB. Free memory was 164.4 MB in the beginning and 121.2 MB in the end (delta: 43.2 MB). Peak memory consumption was 43.2 MB. Max. memory is 7.1 GB. [2020-08-18 19:37:18,270 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 136.8 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 287.84 ms. Allocated memory is still 136.8 MB. Free memory was 99.5 MB in the beginning and 90.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 103.62 ms. Allocated memory was 136.8 MB in the beginning and 199.2 MB in the end (delta: 62.4 MB). Free memory was 90.1 MB in the beginning and 177.8 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 255.69 ms. Allocated memory is still 199.2 MB. Free memory was 177.8 MB in the beginning and 165.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 766.63 ms. Allocated memory is still 199.2 MB. Free memory was 164.4 MB in the beginning and 121.2 MB in the end (delta: 43.2 MB). Peak memory consumption was 43.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 21]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 12 SDslu, 55 SDs, 0 SdLazy, 20 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 10 LocationsWithAnnotation, 12 PreInvPairs, 13 NumberOfFragments, 30 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 22 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 320 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...