/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-fpi/condaf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:34:08,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:34:08,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:34:08,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:34:08,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:34:08,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:34:08,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:34:08,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:34:08,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:34:08,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:34:08,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:34:08,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:34:08,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:34:08,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:34:08,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:34:08,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:34:08,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:34:08,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:34:08,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:34:08,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:34:08,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:34:08,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:34:08,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:34:08,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:34:08,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:34:08,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 06:34:08,738 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 06:34:08,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 06:34:08,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 06:34:08,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 06:34:08,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 06:34:08,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 06:34:08,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 06:34:08,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:34:08,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:34:08,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:34:08,747 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:34:08,769 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:34:08,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:34:08,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:34:08,774 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:34:08,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:34:08,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:34:08,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:34:08,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:34:08,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:34:08,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:34:08,776 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:34:08,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:34:08,776 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:34:08,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:34:08,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:34:08,777 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:34:08,777 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:34:08,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:34:08,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:34:08,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:34:08,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:34:08,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:34:08,779 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:34:09,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:34:09,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:34:09,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:34:09,245 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:34:09,246 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:34:09,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condaf.c [2020-11-07 06:34:09,343 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9718aa3d/896931789b4b4dfa8cf87ab7a31be5e9/FLAG1118af61d [2020-11-07 06:34:10,041 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:34:10,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condaf.c [2020-11-07 06:34:10,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9718aa3d/896931789b4b4dfa8cf87ab7a31be5e9/FLAG1118af61d [2020-11-07 06:34:10,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9718aa3d/896931789b4b4dfa8cf87ab7a31be5e9 [2020-11-07 06:34:10,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:34:10,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:34:10,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:10,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:34:10,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:34:10,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:10" (1/1) ... [2020-11-07 06:34:10,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5104b476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:10, skipping insertion in model container [2020-11-07 06:34:10,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:10" (1/1) ... [2020-11-07 06:34:10,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:34:10,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:34:10,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:10,657 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:34:10,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:10,704 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:34:10,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:10 WrapperNode [2020-11-07 06:34:10,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:10,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:34:10,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:34:10,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:34:10,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:10" (1/1) ... [2020-11-07 06:34:10,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:10" (1/1) ... [2020-11-07 06:34:10,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:10" (1/1) ... [2020-11-07 06:34:10,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:10" (1/1) ... [2020-11-07 06:34:10,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:10" (1/1) ... [2020-11-07 06:34:10,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:10" (1/1) ... [2020-11-07 06:34:10,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:10" (1/1) ... [2020-11-07 06:34:10,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:34:10,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:34:10,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:34:10,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:34:10,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:10" (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 [2020-11-07 06:34:10,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:34:10,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:34:10,862 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:34:10,862 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 06:34:10,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:34:10,863 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:34:10,863 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:34:10,863 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:34:10,864 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:34:10,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:34:10,864 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 06:34:10,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:34:10,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:34:10,865 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 06:34:10,865 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:34:10,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 06:34:10,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:34:10,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:34:10,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:34:10,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:34:10,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:34:10,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:34:11,351 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:34:11,351 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-07 06:34:11,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:11 BoogieIcfgContainer [2020-11-07 06:34:11,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:34:11,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:34:11,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:34:11,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:34:11,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:34:10" (1/3) ... [2020-11-07 06:34:11,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe275d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:11, skipping insertion in model container [2020-11-07 06:34:11,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:10" (2/3) ... [2020-11-07 06:34:11,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe275d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:11, skipping insertion in model container [2020-11-07 06:34:11,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:11" (3/3) ... [2020-11-07 06:34:11,362 INFO L111 eAbstractionObserver]: Analyzing ICFG condaf.c [2020-11-07 06:34:11,380 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:34:11,385 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:34:11,398 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:34:11,433 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:34:11,434 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:34:11,434 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:34:11,434 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:34:11,434 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:34:11,434 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:34:11,435 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:34:11,435 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:34:11,460 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2020-11-07 06:34:11,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-07 06:34:11,472 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:11,473 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:11,473 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:11,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:11,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1165353355, now seen corresponding path program 1 times [2020-11-07 06:34:11,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:11,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532937499] [2020-11-07 06:34:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:11,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:11,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:11,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532937499] [2020-11-07 06:34:11,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:11,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:34:11,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173763713] [2020-11-07 06:34:11,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:34:11,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:11,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:34:11,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:34:11,915 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 3 states. [2020-11-07 06:34:12,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:12,222 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2020-11-07 06:34:12,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:34:12,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-11-07 06:34:12,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:12,233 INFO L225 Difference]: With dead ends: 135 [2020-11-07 06:34:12,234 INFO L226 Difference]: Without dead ends: 65 [2020-11-07 06:34:12,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:34:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-07 06:34:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-11-07 06:34:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-07 06:34:12,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-11-07 06:34:12,294 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 39 [2020-11-07 06:34:12,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:12,295 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-11-07 06:34:12,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:34:12,295 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-11-07 06:34:12,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-07 06:34:12,297 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:12,297 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:12,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:34:12,298 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:12,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1782259906, now seen corresponding path program 1 times [2020-11-07 06:34:12,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:12,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140069164] [2020-11-07 06:34:12,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:12,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:12,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:12,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:12,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140069164] [2020-11-07 06:34:12,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:12,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 06:34:12,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995829716] [2020-11-07 06:34:12,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 06:34:12,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:12,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 06:34:12,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:34:12,513 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 5 states. [2020-11-07 06:34:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:13,084 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2020-11-07 06:34:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 06:34:13,085 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-11-07 06:34:13,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:13,087 INFO L225 Difference]: With dead ends: 122 [2020-11-07 06:34:13,087 INFO L226 Difference]: Without dead ends: 90 [2020-11-07 06:34:13,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:34:13,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-07 06:34:13,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2020-11-07 06:34:13,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-07 06:34:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-11-07 06:34:13,107 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 39 [2020-11-07 06:34:13,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:13,108 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-11-07 06:34:13,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 06:34:13,108 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-11-07 06:34:13,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-07 06:34:13,111 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:13,111 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:13,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:34:13,111 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:13,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1725322241, now seen corresponding path program 1 times [2020-11-07 06:34:13,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:13,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113857602] [2020-11-07 06:34:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:13,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:13,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 06:34:13,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113857602] [2020-11-07 06:34:13,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:13,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:34:13,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220830730] [2020-11-07 06:34:13,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:34:13,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:13,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:34:13,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:34:13,880 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 12 states. [2020-11-07 06:34:14,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:14,579 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-11-07 06:34:14,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 06:34:14,580 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-11-07 06:34:14,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:14,582 INFO L225 Difference]: With dead ends: 130 [2020-11-07 06:34:14,582 INFO L226 Difference]: Without dead ends: 98 [2020-11-07 06:34:14,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-11-07 06:34:14,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-07 06:34:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2020-11-07 06:34:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-07 06:34:14,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-11-07 06:34:14,607 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 63 [2020-11-07 06:34:14,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:14,607 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-11-07 06:34:14,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:34:14,608 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-11-07 06:34:14,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-07 06:34:14,609 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:14,610 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:14,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:34:14,613 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:14,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:14,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1984381639, now seen corresponding path program 1 times [2020-11-07 06:34:14,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:14,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420697187] [2020-11-07 06:34:14,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:34:14,695 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:34:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:34:14,763 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:34:14,800 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 06:34:14,800 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 06:34:14,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:34:14,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:34:14 BoogieIcfgContainer [2020-11-07 06:34:14,886 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:34:14,889 INFO L168 Benchmark]: Toolchain (without parser) took 4479.79 ms. Allocated memory was 161.5 MB in the beginning and 194.0 MB in the end (delta: 32.5 MB). Free memory was 137.4 MB in the beginning and 123.3 MB in the end (delta: 14.1 MB). Peak memory consumption was 47.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:14,890 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 125.8 MB. Free memory was 96.8 MB in the beginning and 96.7 MB in the end (delta: 69.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:34:14,891 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.04 ms. Allocated memory is still 161.5 MB. Free memory was 136.7 MB in the beginning and 126.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:14,892 INFO L168 Benchmark]: Boogie Preprocessor took 55.88 ms. Allocated memory is still 161.5 MB. Free memory was 126.7 MB in the beginning and 125.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:14,893 INFO L168 Benchmark]: RCFGBuilder took 590.52 ms. Allocated memory is still 161.5 MB. Free memory was 125.0 MB in the beginning and 136.9 MB in the end (delta: -11.8 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:14,895 INFO L168 Benchmark]: TraceAbstraction took 3531.32 ms. Allocated memory was 161.5 MB in the beginning and 194.0 MB in the end (delta: 32.5 MB). Free memory was 136.5 MB in the beginning and 123.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:14,901 INFO L339 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 125.8 MB. Free memory was 96.8 MB in the beginning and 96.7 MB in the end (delta: 69.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 290.04 ms. Allocated memory is still 161.5 MB. Free memory was 136.7 MB in the beginning and 126.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.88 ms. Allocated memory is still 161.5 MB. Free memory was 126.7 MB in the beginning and 125.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 590.52 ms. Allocated memory is still 161.5 MB. Free memory was 125.0 MB in the beginning and 136.9 MB in the end (delta: -11.8 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3531.32 ms. Allocated memory was 161.5 MB in the beginning and 194.0 MB in the end (delta: 32.5 MB). Free memory was 136.5 MB in the beginning and 123.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=51, N=0] [L23] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=1, N=1] [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L27] int i; VAL [\old(N)=0, N=1] [L28] int sum[1]; VAL [\old(N)=0, N=1, sum={3:0}] [L29] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-2:0}, malloc(sizeof(int)*N)={-2:0}, N=1, sum={3:0}] [L31] sum[0] = 0 VAL [\old(N)=0, a={-2:0}, malloc(sizeof(int)*N)={-2:0}, N=1, sum={3:0}] [L32] i=0 VAL [\old(N)=0, a={-2:0}, i=0, malloc(sizeof(int)*N)={-2:0}, N=1, sum={3:0}] [L32] COND TRUE i