/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/s3iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:39:01,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:39:01,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:39:01,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:39:01,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:39:01,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:39:01,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:39:01,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:39:01,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:39:01,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:39:01,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:39:01,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:39:01,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:39:01,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:39:01,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:39:01,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:39:01,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:39:01,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:39:01,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:39:01,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:39:01,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:39:01,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:39:01,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:39:01,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:39:01,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:39:01,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:39:01,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:39:01,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:39:01,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:39:01,082 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 16:39:01,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:39:01,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:39:01,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:39:01,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:39:01,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:39:01,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:39:01,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:39:01,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:39:01,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:39:01,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:39:01,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:39:01,093 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 16:39:01,138 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:39:01,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:39:01,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:39:01,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:39:01,141 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:39:01,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:39:01,141 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:39:01,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:39:01,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:39:01,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:39:01,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:39:01,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:39:01,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:39:01,144 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:39:01,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:39:01,145 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:39:01,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:39:01,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:39:01,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:39:01,146 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:39:01,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:39:01,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:39:01,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:39:01,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:39:01,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:39:01,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:39:01,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:39:01,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:39:01,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:39:01,148 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 16:39:01,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:39:01,483 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:39:01,486 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:39:01,487 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:39:01,487 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:39:01,488 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s3iff.c [2020-08-21 16:39:01,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64e918d26/acf876b50e69467296a0c634085c697e/FLAG4b9ffab77 [2020-08-21 16:39:02,017 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:39:02,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s3iff.c [2020-08-21 16:39:02,026 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64e918d26/acf876b50e69467296a0c634085c697e/FLAG4b9ffab77 [2020-08-21 16:39:02,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64e918d26/acf876b50e69467296a0c634085c697e [2020-08-21 16:39:02,406 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:39:02,408 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:39:02,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:39:02,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:39:02,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:39:02,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:39:02" (1/1) ... [2020-08-21 16:39:02,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72808bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:02, skipping insertion in model container [2020-08-21 16:39:02,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:39:02" (1/1) ... [2020-08-21 16:39:02,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:39:02,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:39:02,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:39:02,619 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:39:02,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:39:02,654 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:39:02,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:02 WrapperNode [2020-08-21 16:39:02,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:39:02,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:39:02,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:39:02,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:39:02,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:02" (1/1) ... [2020-08-21 16:39:02,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:02" (1/1) ... [2020-08-21 16:39:02,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:02" (1/1) ... [2020-08-21 16:39:02,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:02" (1/1) ... [2020-08-21 16:39:02,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:02" (1/1) ... [2020-08-21 16:39:02,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:02" (1/1) ... [2020-08-21 16:39:02,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:02" (1/1) ... [2020-08-21 16:39:02,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:39:02,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:39:02,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:39:02,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:39:02,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:02" (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 16:39:02,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:39:02,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:39:02,848 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 16:39:02,848 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 16:39:02,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:39:02,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:39:02,849 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 16:39:02,849 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 16:39:02,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 16:39:02,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 16:39:02,852 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 16:39:02,852 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:39:02,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 16:39:02,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 16:39:02,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 16:39:02,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 16:39:02,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 16:39:02,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:39:02,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:39:03,158 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:39:03,158 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 16:39:03,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:39:03 BoogieIcfgContainer [2020-08-21 16:39:03,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:39:03,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:39:03,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:39:03,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:39:03,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:39:02" (1/3) ... [2020-08-21 16:39:03,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651fb60a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:39:03, skipping insertion in model container [2020-08-21 16:39:03,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:02" (2/3) ... [2020-08-21 16:39:03,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651fb60a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:39:03, skipping insertion in model container [2020-08-21 16:39:03,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:39:03" (3/3) ... [2020-08-21 16:39:03,171 INFO L109 eAbstractionObserver]: Analyzing ICFG s3iff.c [2020-08-21 16:39:03,182 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:39:03,193 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:39:03,210 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:39:03,234 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:39:03,234 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:39:03,234 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:39:03,235 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:39:03,235 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:39:03,235 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:39:03,235 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:39:03,235 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:39:03,252 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-08-21 16:39:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 16:39:03,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:03,259 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 16:39:03,259 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:03,264 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-08-21 16:39:03,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:03,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922891882] [2020-08-21 16:39:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:03,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:03,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 16:39:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:03,537 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 16:39:03,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922891882] [2020-08-21 16:39:03,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:03,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:39:03,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287701826] [2020-08-21 16:39:03,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:39:03,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:03,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:39:03,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:39:03,571 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-08-21 16:39:03,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:03,721 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-08-21 16:39:03,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:39:03,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 16:39:03,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:03,737 INFO L225 Difference]: With dead ends: 54 [2020-08-21 16:39:03,738 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 16:39:03,743 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 16:39:03,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 16:39:03,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-21 16:39:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-21 16:39:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-08-21 16:39:03,783 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-08-21 16:39:03,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:03,784 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-08-21 16:39:03,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:39:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-08-21 16:39:03,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 16:39:03,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:03,786 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 16:39:03,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:39:03,787 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:03,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:03,787 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-08-21 16:39:03,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:03,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241228105] [2020-08-21 16:39:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:03,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:03,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 16:39:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:03,909 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 16:39:03,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241228105] [2020-08-21 16:39:03,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:03,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:39:03,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109278517] [2020-08-21 16:39:03,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:39:03,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:03,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:39:03,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:39:03,913 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-08-21 16:39:04,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:04,025 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-21 16:39:04,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 16:39:04,026 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-21 16:39:04,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:04,027 INFO L225 Difference]: With dead ends: 40 [2020-08-21 16:39:04,027 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 16:39:04,029 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 16:39:04,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 16:39:04,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-08-21 16:39:04,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 16:39:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-08-21 16:39:04,038 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-08-21 16:39:04,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:04,038 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-08-21 16:39:04,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:39:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-08-21 16:39:04,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 16:39:04,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:04,040 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] [2020-08-21 16:39:04,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:39:04,040 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:04,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:04,041 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-08-21 16:39:04,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:04,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653052976] [2020-08-21 16:39:04,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:04,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:04,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 16:39:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:04,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653052976] [2020-08-21 16:39:04,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:39:04,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 16:39:04,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141764539] [2020-08-21 16:39:04,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 16:39:04,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:04,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 16:39:04,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:39:04,445 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 12 states. [2020-08-21 16:39:04,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:04,957 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-08-21 16:39:04,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 16:39:04,958 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-08-21 16:39:04,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:04,961 INFO L225 Difference]: With dead ends: 42 [2020-08-21 16:39:04,961 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 16:39:04,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-08-21 16:39:04,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 16:39:04,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-08-21 16:39:04,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 16:39:04,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-21 16:39:04,972 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 26 [2020-08-21 16:39:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:04,972 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-21 16:39:04,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 16:39:04,973 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-21 16:39:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 16:39:04,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:04,974 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] [2020-08-21 16:39:04,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:39:04,974 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:04,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:04,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1255066423, now seen corresponding path program 1 times [2020-08-21 16:39:04,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:04,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222911457] [2020-08-21 16:39:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:04,989 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-21 16:39:04,990 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-21 16:39:04,990 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 16:39:04,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:39:05,030 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-21 16:39:05,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:39:05 BoogieIcfgContainer [2020-08-21 16:39:05,031 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:39:05,036 INFO L168 Benchmark]: Toolchain (without parser) took 2627.42 ms. Allocated memory was 141.6 MB in the beginning and 234.9 MB in the end (delta: 93.3 MB). Free memory was 104.3 MB in the beginning and 136.8 MB in the end (delta: -32.6 MB). Peak memory consumption was 60.8 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:05,039 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 16:39:05,043 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.78 ms. Allocated memory is still 141.6 MB. Free memory was 103.9 MB in the beginning and 93.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:05,044 INFO L168 Benchmark]: Boogie Preprocessor took 133.48 ms. Allocated memory was 141.6 MB in the beginning and 203.4 MB in the end (delta: 61.9 MB). Free memory was 93.5 MB in the beginning and 180.8 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:05,045 INFO L168 Benchmark]: RCFGBuilder took 372.40 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 163.4 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:05,049 INFO L168 Benchmark]: TraceAbstraction took 1869.40 ms. Allocated memory was 203.4 MB in the beginning and 234.9 MB in the end (delta: 31.5 MB). Free memory was 162.8 MB in the beginning and 136.8 MB in the end (delta: 25.9 MB). Peak memory consumption was 57.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:05,056 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.78 ms. Allocated memory is still 141.6 MB. Free memory was 103.9 MB in the beginning and 93.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.48 ms. Allocated memory was 141.6 MB in the beginning and 203.4 MB in the end (delta: 61.9 MB). Free memory was 93.5 MB in the beginning and 180.8 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 372.40 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 163.4 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1869.40 ms. Allocated memory was 203.4 MB in the beginning and 234.9 MB in the end (delta: 31.5 MB). Free memory was 162.8 MB in the beginning and 136.8 MB in the end (delta: 25.9 MB). Peak memory consumption was 57.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible 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] sum[0] = 1 [L30] i=0 [L30] COND TRUE i