/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/nsqm-iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:44:23,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:44:23,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:44:23,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:44:23,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:44:23,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:44:23,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:44:23,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:44:23,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:44:23,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:44:23,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:44:23,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:44:23,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:44:24,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:44:24,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:44:24,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:44:24,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:44:24,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:44:24,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:44:24,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:44:24,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:44:24,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:44:24,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:44:24,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:44:24,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:44:24,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:44:24,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:44:24,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:44:24,046 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:44:24,072 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:44:24,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:44:24,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:44:24,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:44:24,075 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:44:24,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:44:24,075 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:44:24,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:44:24,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:44:24,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:44:24,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:44:24,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:44:24,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:44:24,077 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:44:24,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:44:24,077 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:44:24,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:44:24,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:44:24,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:44:24,078 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:44:24,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:44:24,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:44:24,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:44:24,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:44:24,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:44:24,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:44:24,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:44:24,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:44:24,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:44:24,080 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:44:24,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:44:24,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:44:24,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:44:24,498 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:44:24,499 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:44:24,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/nsqm-iff.c [2020-11-06 22:44:24,585 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49912846d/c5cf2b1fe42a465ebbc9d0c46402d0f2/FLAG37971cb86 [2020-11-06 22:44:25,229 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:44:25,229 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/nsqm-iff.c [2020-11-06 22:44:25,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49912846d/c5cf2b1fe42a465ebbc9d0c46402d0f2/FLAG37971cb86 [2020-11-06 22:44:25,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49912846d/c5cf2b1fe42a465ebbc9d0c46402d0f2 [2020-11-06 22:44:25,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:44:25,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:44:25,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:44:25,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:44:25,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:44:25,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:25" (1/1) ... [2020-11-06 22:44:25,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cf1b19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:25, skipping insertion in model container [2020-11-06 22:44:25,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:25" (1/1) ... [2020-11-06 22:44:25,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:44:25,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:44:25,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:44:25,819 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:44:25,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:44:25,886 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:44:25,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:25 WrapperNode [2020-11-06 22:44:25,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:44:25,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:44:25,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:44:25,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:44:25,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:25" (1/1) ... [2020-11-06 22:44:25,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:25" (1/1) ... [2020-11-06 22:44:25,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:25" (1/1) ... [2020-11-06 22:44:25,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:25" (1/1) ... [2020-11-06 22:44:25,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:25" (1/1) ... [2020-11-06 22:44:25,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:25" (1/1) ... [2020-11-06 22:44:25,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:25" (1/1) ... [2020-11-06 22:44:25,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:44:25,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:44:25,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:44:25,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:44:25,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:25" (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 [2020-11-06 22:44:26,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:44:26,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:44:26,098 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:44:26,098 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:44:26,098 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:44:26,099 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:44:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:44:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:44:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:44:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:44:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:44:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:44:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:44:26,101 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-06 22:44:26,101 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:44:26,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-06 22:44:26,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:44:26,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:44:26,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:44:26,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:44:26,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:44:26,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:44:26,686 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:44:26,687 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-06 22:44:26,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:26 BoogieIcfgContainer [2020-11-06 22:44:26,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:44:26,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:44:26,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:44:26,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:44:26,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:44:25" (1/3) ... [2020-11-06 22:44:26,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@119d604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:26, skipping insertion in model container [2020-11-06 22:44:26,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:25" (2/3) ... [2020-11-06 22:44:26,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@119d604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:26, skipping insertion in model container [2020-11-06 22:44:26,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:26" (3/3) ... [2020-11-06 22:44:26,703 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqm-iff.c [2020-11-06 22:44:26,721 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:44:26,726 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:44:26,741 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:44:26,786 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:44:26,787 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:44:26,787 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:44:26,787 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:44:26,787 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:44:26,788 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:44:26,788 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:44:26,788 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:44:26,812 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-11-06 22:44:26,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:44:26,823 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:26,823 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] [2020-11-06 22:44:26,824 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:26,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:26,834 INFO L82 PathProgramCache]: Analyzing trace with hash -996507287, now seen corresponding path program 1 times [2020-11-06 22:44:26,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:26,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473269072] [2020-11-06 22:44:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:27,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:27,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:27,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473269072] [2020-11-06 22:44:27,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:27,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:44:27,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774792125] [2020-11-06 22:44:27,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:44:27,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:27,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:44:27,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:44:27,176 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-11-06 22:44:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:27,367 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2020-11-06 22:44:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:44:27,370 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-11-06 22:44:27,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:27,379 INFO L225 Difference]: With dead ends: 67 [2020-11-06 22:44:27,379 INFO L226 Difference]: Without dead ends: 32 [2020-11-06 22:44:27,382 INFO L677 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 [2020-11-06 22:44:27,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-06 22:44:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-06 22:44:27,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:44:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-11-06 22:44:27,453 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2020-11-06 22:44:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:27,454 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-11-06 22:44:27,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:44:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-11-06 22:44:27,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:44:27,456 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:27,456 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] [2020-11-06 22:44:27,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:44:27,457 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:27,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:27,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1837020483, now seen corresponding path program 1 times [2020-11-06 22:44:27,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:27,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642869984] [2020-11-06 22:44:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:27,526 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:27,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797781108] [2020-11-06 22:44:27,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:27,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-06 22:44:27,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:27,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642869984] [2020-11-06 22:44:27,781 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:27,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797781108] [2020-11-06 22:44:27,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:27,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:44:27,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55075839] [2020-11-06 22:44:27,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:44:27,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:27,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:44:27,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:44:27,785 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 4 states. [2020-11-06 22:44:27,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:27,936 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2020-11-06 22:44:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:44:27,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-11-06 22:44:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:27,940 INFO L225 Difference]: With dead ends: 58 [2020-11-06 22:44:27,940 INFO L226 Difference]: Without dead ends: 42 [2020-11-06 22:44:27,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:44:27,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-06 22:44:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-11-06 22:44:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-06 22:44:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-11-06 22:44:27,955 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2020-11-06 22:44:27,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:27,955 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-11-06 22:44:27,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:44:27,955 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-11-06 22:44:27,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:44:27,956 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:27,957 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] [2020-11-06 22:44:28,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:44:28,172 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:28,174 INFO L82 PathProgramCache]: Analyzing trace with hash 617062164, now seen corresponding path program 1 times [2020-11-06 22:44:28,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:28,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927316754] [2020-11-06 22:44:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:28,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:28,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:44:28,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927316754] [2020-11-06 22:44:28,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:28,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:44:28,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564715972] [2020-11-06 22:44:28,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:44:28,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:28,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:44:28,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:44:28,316 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 4 states. [2020-11-06 22:44:28,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:28,513 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-11-06 22:44:28,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:44:28,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-06 22:44:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:28,515 INFO L225 Difference]: With dead ends: 62 [2020-11-06 22:44:28,515 INFO L226 Difference]: Without dead ends: 42 [2020-11-06 22:44:28,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:44:28,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-06 22:44:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-11-06 22:44:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-06 22:44:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-11-06 22:44:28,524 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2020-11-06 22:44:28,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:28,525 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-11-06 22:44:28,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:44:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-11-06 22:44:28,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:44:28,526 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:28,526 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] [2020-11-06 22:44:28,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:44:28,527 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:28,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:28,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1010089174, now seen corresponding path program 1 times [2020-11-06 22:44:28,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:28,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271437891] [2020-11-06 22:44:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:28,548 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:28,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377525152] [2020-11-06 22:44:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:44:28,653 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:44:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:44:28,691 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:44:28,732 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:44:28,732 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:44:28,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:28,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:44:28 BoogieIcfgContainer [2020-11-06 22:44:28,994 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:44:28,996 INFO L168 Benchmark]: Toolchain (without parser) took 3417.64 ms. Allocated memory was 125.8 MB in the beginning and 160.4 MB in the end (delta: 34.6 MB). Free memory was 101.6 MB in the beginning and 87.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 49.3 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:28,997 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory is still 86.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:44:28,998 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.32 ms. Allocated memory is still 125.8 MB. Free memory was 101.0 MB in the beginning and 91.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:28,999 INFO L168 Benchmark]: Boogie Preprocessor took 89.73 ms. Allocated memory is still 125.8 MB. Free memory was 91.1 MB in the beginning and 89.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:29,000 INFO L168 Benchmark]: RCFGBuilder took 706.98 ms. Allocated memory was 125.8 MB in the beginning and 160.4 MB in the end (delta: 34.6 MB). Free memory was 89.4 MB in the beginning and 142.5 MB in the end (delta: -53.1 MB). Peak memory consumption was 20.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:29,001 INFO L168 Benchmark]: TraceAbstraction took 2299.65 ms. Allocated memory is still 160.4 MB. Free memory was 142.0 MB in the beginning and 87.6 MB in the end (delta: 54.3 MB). Peak memory consumption was 53.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:44:29,006 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory is still 86.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 304.32 ms. Allocated memory is still 125.8 MB. Free memory was 101.0 MB in the beginning and 91.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 89.73 ms. Allocated memory is still 125.8 MB. Free memory was 91.1 MB in the beginning and 89.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 706.98 ms. Allocated memory was 125.8 MB in the beginning and 160.4 MB in the end (delta: 34.6 MB). Free memory was 89.4 MB in the beginning and 142.5 MB in the end (delta: -53.1 MB). Peak memory consumption was 20.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2299.65 ms. Allocated memory is still 160.4 MB. Free memory was 142.0 MB in the beginning and 87.6 MB in the end (delta: 54.3 MB). Peak memory consumption was 53.8 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)=18, N=0] [L23] N = __VERIFIER_nondet_int() [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; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [\old(N)=0, a={1:0}, b={-1:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={1:0}, N=1] [L31] COND TRUE i