/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/n.c11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:10:54,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:10:54,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:10:54,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:10:54,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:10:54,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:10:54,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:10:54,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:10:54,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:10:54,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:10:54,929 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:10:54,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:10:54,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:10:54,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:10:54,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:10:54,937 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:10:54,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:10:54,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:10:54,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:10:54,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:10:54,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:10:54,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:10:54,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:10:54,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:10:54,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:10:54,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:10:54,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:10:54,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:10:54,965 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 23:10:54,979 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:10:54,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:10:54,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:10:54,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:10:54,981 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:10:54,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:10:54,982 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:10:54,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:10:54,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:10:54,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:10:54,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:10:54,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:10:54,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:10:54,983 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:10:54,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:10:54,983 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:10:54,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:10:54,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:10:54,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:10:54,984 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:10:54,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:10:54,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:10:54,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:10:54,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:10:54,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:10:54,985 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:10:54,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:54,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:10:54,986 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:10:54,986 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:10:55,348 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:10:55,362 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:10:55,366 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:10:55,368 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:10:55,369 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:10:55,370 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c [2020-07-21 23:10:55,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11532eef1/5d55367d9efc4be4af532ed5c76b76bc/FLAG093b24b6b [2020-07-21 23:10:55,959 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:10:55,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c [2020-07-21 23:10:55,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11532eef1/5d55367d9efc4be4af532ed5c76b76bc/FLAG093b24b6b [2020-07-21 23:10:56,313 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11532eef1/5d55367d9efc4be4af532ed5c76b76bc [2020-07-21 23:10:56,324 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:10:56,327 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:10:56,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:10:56,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:10:56,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:10:56,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:10:56" (1/1) ... [2020-07-21 23:10:56,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8201e09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:56, skipping insertion in model container [2020-07-21 23:10:56,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:10:56" (1/1) ... [2020-07-21 23:10:56,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:10:56,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:10:56,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:10:56,543 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:10:56,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:10:56,576 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:10:56,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:56 WrapperNode [2020-07-21 23:10:56,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:10:56,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:10:56,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:10:56,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:10:56,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:56" (1/1) ... [2020-07-21 23:10:56,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:56" (1/1) ... [2020-07-21 23:10:56,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:56" (1/1) ... [2020-07-21 23:10:56,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:56" (1/1) ... [2020-07-21 23:10:56,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:56" (1/1) ... [2020-07-21 23:10:56,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:56" (1/1) ... [2020-07-21 23:10:56,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:56" (1/1) ... [2020-07-21 23:10:56,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:10:56,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:10:56,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:10:56,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:10:56,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:10:56,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:10:56,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:10:56,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:10:56,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:10:56,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:10:56,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:10:56,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 23:10:56,763 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:10:56,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:10:56,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:10:56,956 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:10:56,956 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:10:56,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:10:56 BoogieIcfgContainer [2020-07-21 23:10:56,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:10:56,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:10:56,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:10:56,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:10:56,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:10:56" (1/3) ... [2020-07-21 23:10:56,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e23679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:10:56, skipping insertion in model container [2020-07-21 23:10:56,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:56" (2/3) ... [2020-07-21 23:10:56,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e23679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:10:56, skipping insertion in model container [2020-07-21 23:10:56,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:10:56" (3/3) ... [2020-07-21 23:10:56,970 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c11.c [2020-07-21 23:10:56,982 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:10:56,990 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:10:57,025 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:10:57,094 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:10:57,094 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:10:57,094 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:10:57,094 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:10:57,094 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:10:57,095 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:10:57,095 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:10:57,095 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:10:57,136 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 23:10:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 23:10:57,142 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:57,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:57,143 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:57,149 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2020-07-21 23:10:57,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:57,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562962480] [2020-07-21 23:10:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:57,212 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:10:57,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:57,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 23:10:57,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:10:57,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:10:57,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562962480] [2020-07-21 23:10:57,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:10:57,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 23:10:57,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726094210] [2020-07-21 23:10:57,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 23:10:57,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:57,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 23:10:57,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:10:57,261 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-21 23:10:57,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:57,282 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-07-21 23:10:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 23:10:57,283 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 23:10:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:57,290 INFO L225 Difference]: With dead ends: 32 [2020-07-21 23:10:57,290 INFO L226 Difference]: Without dead ends: 13 [2020-07-21 23:10:57,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:10:57,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-21 23:10:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-21 23:10:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-21 23:10:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-07-21 23:10:57,331 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-07-21 23:10:57,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:57,332 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-07-21 23:10:57,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 23:10:57,332 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-07-21 23:10:57,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 23:10:57,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:57,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:57,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:57,547 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:57,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:57,549 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2020-07-21 23:10:57,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:57,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242161421] [2020-07-21 23:10:57,550 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:57,575 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:10:57,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:57,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:10:57,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:10:57,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:10:57,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242161421] [2020-07-21 23:10:57,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:10:57,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:10:57,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336921779] [2020-07-21 23:10:57,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:10:57,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:57,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:10:57,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:10:57,641 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-07-21 23:10:57,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:57,700 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-07-21 23:10:57,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:10:57,701 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 23:10:57,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:57,702 INFO L225 Difference]: With dead ends: 27 [2020-07-21 23:10:57,702 INFO L226 Difference]: Without dead ends: 16 [2020-07-21 23:10:57,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:10:57,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-21 23:10:57,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-07-21 23:10:57,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 23:10:57,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 23:10:57,709 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-21 23:10:57,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:57,710 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 23:10:57,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:10:57,710 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 23:10:57,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 23:10:57,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:57,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:57,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:57,912 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:57,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:57,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1776138601, now seen corresponding path program 1 times [2020-07-21 23:10:57,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:57,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450798829] [2020-07-21 23:10:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:57,955 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:10:57,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:57,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:10:57,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:10:58,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:10:58,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:10:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:10:58,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450798829] [2020-07-21 23:10:58,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:10:58,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 23:10:58,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287135108] [2020-07-21 23:10:58,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:10:58,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:58,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:10:58,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:10:58,095 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2020-07-21 23:10:58,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:58,212 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2020-07-21 23:10:58,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:10:58,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-07-21 23:10:58,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:58,214 INFO L225 Difference]: With dead ends: 29 [2020-07-21 23:10:58,214 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 23:10:58,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 23:10:58,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 23:10:58,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 23:10:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 23:10:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 23:10:58,216 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-07-21 23:10:58,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:58,216 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 23:10:58,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:10:58,216 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 23:10:58,216 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 23:10:58,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:58,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 23:10:58,522 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 23:10:58,522 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:10:58,522 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:10:58,522 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 23:10:58,523 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 23:10:58,523 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 23:10:58,523 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 32) the Hoare annotation is: true [2020-07-21 23:10:58,523 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-21 23:10:58,523 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 32) no Hoare annotation was computed. [2020-07-21 23:10:58,524 INFO L268 CegarLoopResult]: For program point L21(lines 21 22) no Hoare annotation was computed. [2020-07-21 23:10:58,524 INFO L268 CegarLoopResult]: For program point L21-2(lines 21 22) no Hoare annotation was computed. [2020-07-21 23:10:58,524 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 27) the Hoare annotation is: (< (mod main_~len~0 4294967296) 5) [2020-07-21 23:10:58,524 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 27) the Hoare annotation is: (< (mod main_~len~0 4294967296) 5) [2020-07-21 23:10:58,525 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 12 32) no Hoare annotation was computed. [2020-07-21 23:10:58,525 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-21 23:10:58,525 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-21 23:10:58,525 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 23:10:58,525 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-21 23:10:58,526 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-21 23:10:58,526 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-21 23:10:58,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:10:58 BoogieIcfgContainer [2020-07-21 23:10:58,551 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:10:58,556 INFO L168 Benchmark]: Toolchain (without parser) took 2227.52 ms. Allocated memory was 145.2 MB in the beginning and 200.8 MB in the end (delta: 55.6 MB). Free memory was 102.7 MB in the beginning and 104.2 MB in the end (delta: -1.6 MB). Peak memory consumption was 54.0 MB. Max. memory is 7.1 GB. [2020-07-21 23:10:58,559 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 23:10:58,561 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.92 ms. Allocated memory is still 145.2 MB. Free memory was 102.3 MB in the beginning and 92.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 23:10:58,563 INFO L168 Benchmark]: Boogie Preprocessor took 118.38 ms. Allocated memory was 145.2 MB in the beginning and 200.8 MB in the end (delta: 55.6 MB). Free memory was 92.8 MB in the beginning and 179.9 MB in the end (delta: -87.1 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 23:10:58,570 INFO L168 Benchmark]: RCFGBuilder took 264.12 ms. Allocated memory is still 200.8 MB. Free memory was 179.2 MB in the beginning and 167.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-07-21 23:10:58,572 INFO L168 Benchmark]: TraceAbstraction took 1588.90 ms. Allocated memory is still 200.8 MB. Free memory was 166.8 MB in the beginning and 104.2 MB in the end (delta: 62.6 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. [2020-07-21 23:10:58,586 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 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.92 ms. Allocated memory is still 145.2 MB. Free memory was 102.3 MB in the beginning and 92.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.38 ms. Allocated memory was 145.2 MB in the beginning and 200.8 MB in the end (delta: 55.6 MB). Free memory was 92.8 MB in the beginning and 179.9 MB in the end (delta: -87.1 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 264.12 ms. Allocated memory is still 200.8 MB. Free memory was 179.2 MB in the beginning and 167.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1588.90 ms. Allocated memory is still 200.8 MB. Free memory was 166.8 MB in the beginning and 104.2 MB in the end (delta: 62.6 MB). Peak memory consumption was 62.6 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: 19]: Loop Invariant Derived loop invariant: len % 4294967296 < 5 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 16 SDslu, 67 SDs, 0 SdLazy, 41 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 21 NumberOfFragments, 15 HoareAnnotationTreeSize, 13 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 14 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 33 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 1050 SizeOfPredicates, 4 NumberOfNonLiveVariables, 62 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 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...