/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:56:29,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:56:29,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:56:29,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:56:29,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:56:29,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:56:29,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:56:29,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:56:29,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:56:29,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:56:29,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:56:29,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:56:29,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:56:29,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:56:29,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:56:29,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:56:29,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:56:29,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:56:29,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:56:29,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:56:29,296 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:56:29,297 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:56:29,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:56:29,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:56:29,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 14:56:29,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:56:29,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:56:29,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:56:29,312 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 14:56:29,337 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:56:29,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:56:29,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:56:29,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:56:29,339 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:56:29,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:56:29,339 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:56:29,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:56:29,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:56:29,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:56:29,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:56:29,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:56:29,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:56:29,341 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:56:29,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:56:29,341 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:56:29,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:56:29,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:56:29,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:56:29,342 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:56:29,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:56:29,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:56:29,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:56:29,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:56:29,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:56:29,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:56:29,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:56:29,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:56:29,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:56:29,344 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:56:29,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:56:29,683 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:56:29,687 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:56:29,689 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:56:29,689 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:56:29,690 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test07.c [2020-08-21 14:56:29,755 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91574c142/c4251217a7ac49e98bf78af80ee5afdb/FLAG0e59c0318 [2020-08-21 14:56:30,207 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:56:30,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test07.c [2020-08-21 14:56:30,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91574c142/c4251217a7ac49e98bf78af80ee5afdb/FLAG0e59c0318 [2020-08-21 14:56:30,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91574c142/c4251217a7ac49e98bf78af80ee5afdb [2020-08-21 14:56:30,663 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:56:30,665 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:56:30,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:56:30,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:56:30,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:56:30,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:56:30" (1/1) ... [2020-08-21 14:56:30,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b4c5c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:30, skipping insertion in model container [2020-08-21 14:56:30,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:56:30" (1/1) ... [2020-08-21 14:56:30,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:56:30,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:56:30,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:56:30,885 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:56:30,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:56:30,912 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:56:30,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:30 WrapperNode [2020-08-21 14:56:30,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:56:30,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:56:30,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:56:30,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:56:30,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:30" (1/1) ... [2020-08-21 14:56:30,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:30" (1/1) ... [2020-08-21 14:56:31,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:30" (1/1) ... [2020-08-21 14:56:31,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:30" (1/1) ... [2020-08-21 14:56:31,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:30" (1/1) ... [2020-08-21 14:56:31,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:30" (1/1) ... [2020-08-21 14:56:31,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:30" (1/1) ... [2020-08-21 14:56:31,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:56:31,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:56:31,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:56:31,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:56:31,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:30" (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 14:56:31,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:56:31,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:56:31,092 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-08-21 14:56:31,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:56:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:56:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-08-21 14:56:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 14:56:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:56:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 14:56:31,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:56:31,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 14:56:31,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 14:56:31,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:56:31,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 14:56:31,331 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:56:31,331 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 14:56:31,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:56:31 BoogieIcfgContainer [2020-08-21 14:56:31,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:56:31,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:56:31,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:56:31,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:56:31,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:56:30" (1/3) ... [2020-08-21 14:56:31,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@987d1e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:56:31, skipping insertion in model container [2020-08-21 14:56:31,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:30" (2/3) ... [2020-08-21 14:56:31,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@987d1e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:56:31, skipping insertion in model container [2020-08-21 14:56:31,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:56:31" (3/3) ... [2020-08-21 14:56:31,343 INFO L109 eAbstractionObserver]: Analyzing ICFG test07.c [2020-08-21 14:56:31,356 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:56:31,364 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:56:31,379 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:56:31,413 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:56:31,413 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:56:31,414 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:56:31,414 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:56:31,414 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:56:31,414 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:56:31,415 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:56:31,415 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:56:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-21 14:56:31,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 14:56:31,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:31,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:31,452 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:31,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:31,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1889415219, now seen corresponding path program 1 times [2020-08-21 14:56:31,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:31,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455355568] [2020-08-21 14:56:31,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:31,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:31,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:56:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:31,873 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 14:56:31,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455355568] [2020-08-21 14:56:31,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:31,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 14:56:31,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671038806] [2020-08-21 14:56:31,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:56:31,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:31,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:56:31,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:56:31,905 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2020-08-21 14:56:32,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:32,043 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-08-21 14:56:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:56:32,045 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-08-21 14:56:32,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:32,056 INFO L225 Difference]: With dead ends: 29 [2020-08-21 14:56:32,056 INFO L226 Difference]: Without dead ends: 15 [2020-08-21 14:56:32,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:56:32,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-21 14:56:32,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-21 14:56:32,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-21 14:56:32,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2020-08-21 14:56:32,104 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 14 [2020-08-21 14:56:32,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:32,105 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2020-08-21 14:56:32,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:56:32,106 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2020-08-21 14:56:32,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 14:56:32,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:32,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:32,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:56:32,107 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:32,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:32,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1918044370, now seen corresponding path program 1 times [2020-08-21 14:56:32,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:32,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711420945] [2020-08-21 14:56:32,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:32,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:32,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:56:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:32,459 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 14:56:32,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711420945] [2020-08-21 14:56:32,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:32,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 14:56:32,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846457113] [2020-08-21 14:56:32,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:56:32,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:32,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:56:32,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:56:32,465 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand 8 states. [2020-08-21 14:56:32,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:32,756 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2020-08-21 14:56:32,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 14:56:32,757 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-08-21 14:56:32,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:32,758 INFO L225 Difference]: With dead ends: 15 [2020-08-21 14:56:32,758 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 14:56:32,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:56:32,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 14:56:32,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 14:56:32,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 14:56:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 14:56:32,763 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-08-21 14:56:32,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:32,764 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 14:56:32,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:56:32,764 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 14:56:32,765 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 14:56:32,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:56:32,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 14:56:32,988 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 14:56:32,989 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~p2~0.base |old(~p2~0.base)|) (= |~#b~0.offset| |old(~#b~0.offset)|) (= |old(#length)| |#length|) (= |~#a~0.offset| |old(~#a~0.offset)|) (= ~p2~0.offset |old(~p2~0.offset)|) (= |~#b~0.base| |old(~#b~0.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~p1~0.offset |old(~p1~0.offset)|) (= ~p1~0.base |old(~p1~0.base)|) (= |~#a~0.base| |old(~#a~0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-21 14:56:32,989 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:56:32,989 INFO L268 CegarLoopResult]: For program point L9(lines 9 14) no Hoare annotation was computed. [2020-08-21 14:56:32,989 INFO L268 CegarLoopResult]: For program point fEXIT(lines 7 15) no Hoare annotation was computed. [2020-08-21 14:56:32,989 INFO L264 CegarLoopResult]: At program point fENTRY(lines 7 15) the Hoare annotation is: (or (not (= |old(~p1~0.offset)| |~#a~0.offset|)) (not (= (select (select |#memory_int| ~p2~0.base) ~p2~0.offset) 1)) (and (= ~p1~0.offset |~#a~0.offset|) (= |old(~p1~0.base)| ~p1~0.base)) (not (= |old(~p1~0.base)| |~#a~0.base|)) (= |~#b~0.base| |~#a~0.base|)) [2020-08-21 14:56:32,990 INFO L268 CegarLoopResult]: For program point fFINAL(lines 7 15) no Hoare annotation was computed. [2020-08-21 14:56:32,991 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:56:32,991 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (not (= |~#b~0.base| |~#a~0.base|)) [2020-08-21 14:56:32,991 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 14:56:32,993 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 14:56:32,993 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 35) no Hoare annotation was computed. [2020-08-21 14:56:32,993 INFO L264 CegarLoopResult]: At program point L30(lines 17 37) the Hoare annotation is: (= |~#a~0.base| |~#b~0.base|) [2020-08-21 14:56:32,993 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 17 37) the Hoare annotation is: (or (and (= ~p2~0.base |old(~p2~0.base)|) (= |old(~p2~0.offset)| ~p2~0.offset) (= |old(~p1~0.offset)| ~p1~0.offset) (= |old(~p1~0.base)| ~p1~0.base)) (= |~#b~0.base| |~#a~0.base|)) [2020-08-21 14:56:32,994 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-08-21 14:56:32,994 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 37) no Hoare annotation was computed. [2020-08-21 14:56:32,994 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (or (and (= |~#a~0.base| ~p1~0.base) (= ~p1~0.offset |~#a~0.offset|) (= (select (select |#memory_int| ~p2~0.base) ~p2~0.offset) 1)) (= |~#b~0.base| |~#a~0.base|)) [2020-08-21 14:56:32,994 INFO L268 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-08-21 14:56:32,994 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 37) no Hoare annotation was computed. [2020-08-21 14:56:33,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:56:33 BoogieIcfgContainer [2020-08-21 14:56:33,019 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:56:33,023 INFO L168 Benchmark]: Toolchain (without parser) took 2357.09 ms. Allocated memory was 139.5 MB in the beginning and 234.9 MB in the end (delta: 95.4 MB). Free memory was 103.0 MB in the beginning and 142.8 MB in the end (delta: -39.8 MB). Peak memory consumption was 55.6 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:33,024 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.5 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-08-21 14:56:33,025 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.32 ms. Allocated memory is still 139.5 MB. Free memory was 102.6 MB in the beginning and 92.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:33,026 INFO L168 Benchmark]: Boogie Preprocessor took 109.83 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.7 MB in the beginning and 178.7 MB in the end (delta: -86.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:33,027 INFO L168 Benchmark]: RCFGBuilder took 311.60 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 164.2 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:33,028 INFO L168 Benchmark]: TraceAbstraction took 1682.84 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 163.2 MB in the beginning and 142.8 MB in the end (delta: 20.4 MB). Peak memory consumption was 54.0 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:33,032 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.5 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.32 ms. Allocated memory is still 139.5 MB. Free memory was 102.6 MB in the beginning and 92.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.83 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.7 MB in the beginning and 178.7 MB in the end (delta: -86.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 311.60 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 164.2 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1682.84 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 163.2 MB in the beginning and 142.8 MB in the end (delta: 20.4 MB). Peak memory consumption was 54.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 35]: 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: 17]: Loop Invariant Derived loop invariant: a == b - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 6 SDslu, 48 SDs, 0 SdLazy, 80 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 7 PreInvPairs, 7 NumberOfFragments, 107 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 79 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 3224 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...