/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:38:40,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:38:40,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:38:40,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:38:40,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:38:40,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:38:40,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:38:40,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:38:40,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:38:40,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:38:40,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:38:40,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:38:40,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:38:40,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:38:40,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:38:40,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:38:40,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:38:40,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:38:40,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:38:40,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:38:40,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:38:40,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:38:40,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:38:40,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:38:40,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:38:40,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:38:40,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:38:40,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:38:40,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:38:40,080 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 16:38:40,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:38:40,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:38:40,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:38:40,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:38:40,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:38:40,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:38:40,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:38:40,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:38:40,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:38:40,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:38:40,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:38:40,090 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 16:38:40,128 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:38:40,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:38:40,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:38:40,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:38:40,136 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:38:40,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:38:40,136 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:38:40,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:38:40,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:38:40,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:38:40,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:38:40,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:38:40,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:38:40,137 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:38:40,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:38:40,138 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:38:40,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:38:40,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:38:40,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:38:40,138 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:38:40,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:38:40,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:38:40,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:38:40,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:38:40,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:38:40,145 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:38:40,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:38:40,145 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:38:40,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:38:40,146 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:38:40,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:38:40,480 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:38:40,491 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:38:40,493 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:38:40,493 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:38:40,494 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-08-21 16:38:40,570 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad1f32319/3efafda86f084a70aaaa93ec4953a1e1/FLAG53fc69568 [2020-08-21 16:38:41,063 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:38:41,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs2f.c [2020-08-21 16:38:41,069 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad1f32319/3efafda86f084a70aaaa93ec4953a1e1/FLAG53fc69568 [2020-08-21 16:38:41,478 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad1f32319/3efafda86f084a70aaaa93ec4953a1e1 [2020-08-21 16:38:41,487 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:38:41,488 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:38:41,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:38:41,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:38:41,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:38:41,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:38:41" (1/1) ... [2020-08-21 16:38:41,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@678b2c62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:41, skipping insertion in model container [2020-08-21 16:38:41,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:38:41" (1/1) ... [2020-08-21 16:38:41,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:38:41,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:38:41,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:38:41,708 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:38:41,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:38:41,742 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:38:41,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:41 WrapperNode [2020-08-21 16:38:41,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:38:41,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:38:41,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:38:41,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:38:41,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:41" (1/1) ... [2020-08-21 16:38:41,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:41" (1/1) ... [2020-08-21 16:38:41,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:41" (1/1) ... [2020-08-21 16:38:41,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:41" (1/1) ... [2020-08-21 16:38:41,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:41" (1/1) ... [2020-08-21 16:38:41,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:41" (1/1) ... [2020-08-21 16:38:41,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:41" (1/1) ... [2020-08-21 16:38:41,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:38:41,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:38:41,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:38:41,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:38:41,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:41" (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 16:38:41,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:38:41,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:38:41,910 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 16:38:41,910 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 16:38:41,910 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:38:41,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:38:41,911 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 16:38:41,911 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 16:38:41,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 16:38:41,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 16:38:41,911 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 16:38:41,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:38:41,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 16:38:41,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 16:38:41,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 16:38:41,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 16:38:41,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 16:38:41,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:38:41,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:38:42,259 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:38:42,259 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 16:38:42,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:38:42 BoogieIcfgContainer [2020-08-21 16:38:42,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:38:42,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:38:42,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:38:42,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:38:42,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:38:41" (1/3) ... [2020-08-21 16:38:42,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68484ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:38:42, skipping insertion in model container [2020-08-21 16:38:42,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:38:41" (2/3) ... [2020-08-21 16:38:42,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68484ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:38:42, skipping insertion in model container [2020-08-21 16:38:42,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:38:42" (3/3) ... [2020-08-21 16:38:42,274 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-08-21 16:38:42,283 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:38:42,290 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:38:42,304 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:38:42,324 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:38:42,324 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:38:42,324 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:38:42,324 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:38:42,325 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:38:42,325 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:38:42,325 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:38:42,325 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:38:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-21 16:38:42,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 16:38:42,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:42,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:42,350 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:42,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:42,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-08-21 16:38:42,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:42,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492455115] [2020-08-21 16:38:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:42,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:42,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 16:38:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:42,559 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 16:38:42,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492455115] [2020-08-21 16:38:42,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:38:42,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:38:42,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526440501] [2020-08-21 16:38:42,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:38:42,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:42,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:38:42,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:38:42,584 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-08-21 16:38:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:42,706 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-21 16:38:42,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:38:42,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 16:38:42,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:42,720 INFO L225 Difference]: With dead ends: 56 [2020-08-21 16:38:42,720 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 16:38:42,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:38:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 16:38:42,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-21 16:38:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 16:38:42,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-21 16:38:42,774 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-08-21 16:38:42,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:42,775 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-21 16:38:42,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:38:42,775 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-21 16:38:42,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 16:38:42,777 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:42,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:42,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:38:42,778 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:42,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:42,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-08-21 16:38:42,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:42,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483169457] [2020-08-21 16:38:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:42,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:42,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 16:38:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:42,940 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 16:38:42,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483169457] [2020-08-21 16:38:42,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:38:42,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:38:42,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950137270] [2020-08-21 16:38:42,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:38:42,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:42,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:38:42,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:38:42,945 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-08-21 16:38:43,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:43,075 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-21 16:38:43,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 16:38:43,076 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-21 16:38:43,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:43,077 INFO L225 Difference]: With dead ends: 45 [2020-08-21 16:38:43,077 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 16:38:43,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 16:38:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 16:38:43,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 16:38:43,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 16:38:43,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-21 16:38:43,087 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-08-21 16:38:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:43,088 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-21 16:38:43,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:38:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-21 16:38:43,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 16:38:43,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:43,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:43,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:38:43,090 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:43,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:43,090 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-08-21 16:38:43,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:43,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24659484] [2020-08-21 16:38:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:43,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:43,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 16:38:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 16:38:43,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24659484] [2020-08-21 16:38:43,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:38:43,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 16:38:43,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702269999] [2020-08-21 16:38:43,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:38:43,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:43,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:38:43,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:38:43,272 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-08-21 16:38:43,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:43,488 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-21 16:38:43,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 16:38:43,489 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-21 16:38:43,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:43,490 INFO L225 Difference]: With dead ends: 39 [2020-08-21 16:38:43,490 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 16:38:43,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:38:43,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 16:38:43,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-21 16:38:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 16:38:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-21 16:38:43,499 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-08-21 16:38:43,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:43,499 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-21 16:38:43,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:38:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-21 16:38:43,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 16:38:43,501 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:43,501 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:43,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:38:43,502 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:43,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:43,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-08-21 16:38:43,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:43,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069832352] [2020-08-21 16:38:43,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:43,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:43,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 16:38:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:43,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069832352] [2020-08-21 16:38:43,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:43,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 16:38:43,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229985825] [2020-08-21 16:38:43,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:38:43,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:43,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:38:43,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:38:43,653 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-08-21 16:38:43,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:43,812 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-08-21 16:38:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 16:38:43,813 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-08-21 16:38:43,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:43,814 INFO L225 Difference]: With dead ends: 54 [2020-08-21 16:38:43,814 INFO L226 Difference]: Without dead ends: 38 [2020-08-21 16:38:43,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:38:43,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-21 16:38:43,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-21 16:38:43,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 16:38:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-08-21 16:38:43,822 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-08-21 16:38:43,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:43,823 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-08-21 16:38:43,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:38:43,823 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-08-21 16:38:43,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 16:38:43,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:43,825 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:43,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:38:43,825 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:43,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:43,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1781264291, now seen corresponding path program 2 times [2020-08-21 16:38:43,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:43,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052118345] [2020-08-21 16:38:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:43,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:43,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 16:38:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 16:38:43,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052118345] [2020-08-21 16:38:43,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:43,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 16:38:43,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104022865] [2020-08-21 16:38:43,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:38:43,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:43,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:38:43,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:38:43,933 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-08-21 16:38:44,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:44,028 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-08-21 16:38:44,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:38:44,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-21 16:38:44,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:44,030 INFO L225 Difference]: With dead ends: 55 [2020-08-21 16:38:44,030 INFO L226 Difference]: Without dead ends: 38 [2020-08-21 16:38:44,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:38:44,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-21 16:38:44,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-08-21 16:38:44,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 16:38:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-08-21 16:38:44,037 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-08-21 16:38:44,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:44,038 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-08-21 16:38:44,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:38:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-08-21 16:38:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 16:38:44,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:44,040 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:44,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:38:44,040 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:44,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:44,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-08-21 16:38:44,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:44,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031786397] [2020-08-21 16:38:44,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:44,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:44,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 16:38:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:44,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031786397] [2020-08-21 16:38:44,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:44,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 16:38:44,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750687189] [2020-08-21 16:38:44,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 16:38:44,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:44,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 16:38:44,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-08-21 16:38:44,347 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 14 states. [2020-08-21 16:38:44,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:44,873 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-21 16:38:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 16:38:44,874 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-08-21 16:38:44,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:44,875 INFO L225 Difference]: With dead ends: 46 [2020-08-21 16:38:44,875 INFO L226 Difference]: Without dead ends: 40 [2020-08-21 16:38:44,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-08-21 16:38:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-21 16:38:44,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-08-21 16:38:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-21 16:38:44,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-08-21 16:38:44,883 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2020-08-21 16:38:44,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:44,883 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-08-21 16:38:44,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 16:38:44,884 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-08-21 16:38:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-21 16:38:44,884 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:44,884 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:44,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:38:44,885 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:44,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:44,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-08-21 16:38:44,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:44,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540620783] [2020-08-21 16:38:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:44,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:38:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:44,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 16:38:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:38:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:38:44,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540620783] [2020-08-21 16:38:44,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:38:44,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 16:38:44,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972298307] [2020-08-21 16:38:44,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:38:44,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:38:44,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:38:44,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:38:44,989 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 10 states. [2020-08-21 16:38:45,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:38:45,163 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-08-21 16:38:45,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 16:38:45,164 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-08-21 16:38:45,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:38:45,165 INFO L225 Difference]: With dead ends: 66 [2020-08-21 16:38:45,165 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 16:38:45,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-21 16:38:45,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 16:38:45,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-08-21 16:38:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-21 16:38:45,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-21 16:38:45,176 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 36 [2020-08-21 16:38:45,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:38:45,177 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-21 16:38:45,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:38:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-21 16:38:45,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 16:38:45,181 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:38:45,181 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:38:45,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:38:45,182 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:38:45,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:38:45,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1680039082, now seen corresponding path program 3 times [2020-08-21 16:38:45,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:38:45,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985727122] [2020-08-21 16:38:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:38:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 16:38:45,249 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 16:38:45,249 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 16:38:45,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:38:45,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:38:45 BoogieIcfgContainer [2020-08-21 16:38:45,285 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:38:45,289 INFO L168 Benchmark]: Toolchain (without parser) took 3799.88 ms. Allocated memory was 140.5 MB in the beginning and 243.3 MB in the end (delta: 102.8 MB). Free memory was 103.9 MB in the beginning and 113.6 MB in the end (delta: -9.7 MB). Peak memory consumption was 93.1 MB. Max. memory is 7.1 GB. [2020-08-21 16:38:45,296 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 16:38:45,300 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.66 ms. Allocated memory is still 140.5 MB. Free memory was 103.7 MB in the beginning and 93.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-21 16:38:45,301 INFO L168 Benchmark]: Boogie Preprocessor took 109.58 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 93.2 MB in the beginning and 179.7 MB in the end (delta: -86.5 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-21 16:38:45,302 INFO L168 Benchmark]: RCFGBuilder took 413.21 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 162.4 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-08-21 16:38:45,303 INFO L168 Benchmark]: TraceAbstraction took 3017.40 ms. Allocated memory was 202.4 MB in the beginning and 243.3 MB in the end (delta: 40.9 MB). Free memory was 162.4 MB in the beginning and 113.6 MB in the end (delta: 48.8 MB). Peak memory consumption was 89.7 MB. Max. memory is 7.1 GB. [2020-08-21 16:38:45,310 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.66 ms. Allocated memory is still 140.5 MB. Free memory was 103.7 MB in the beginning and 93.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.58 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 93.2 MB in the beginning and 179.7 MB in the end (delta: -86.5 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 413.21 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 162.4 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3017.40 ms. Allocated memory was 202.4 MB in the beginning and 243.3 MB in the end (delta: 40.9 MB). Free memory was 162.4 MB in the beginning and 113.6 MB in the end (delta: 48.8 MB). Peak memory consumption was 89.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 [L29] COND TRUE i