/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 04:46:13,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:46:13,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:46:13,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:46:13,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:46:13,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:46:13,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:46:13,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:46:13,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:46:13,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:46:13,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:46:13,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:46:13,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:46:13,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:46:13,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:46:13,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:46:13,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:46:13,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:46:13,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:46:13,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:46:13,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:46:13,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:46:13,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:46:13,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:46:13,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 04:46:13,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 04:46:13,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 04:46:13,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 04:46:13,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 04:46:13,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 04:46:13,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 04:46:13,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 04:46:13,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 04:46:13,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 04:46:13,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 04:46:13,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 04:46:13,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 04:46:13,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 04:46:13,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:46:13,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:46:13,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:46:13,273 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 [2020-08-22 04:46:13,295 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:46:13,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:46:13,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:46:13,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:46:13,297 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:46:13,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:46:13,297 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:46:13,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:46:13,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:46:13,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:46:13,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:46:13,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:46:13,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:46:13,298 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:46:13,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:46:13,299 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:46:13,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:46:13,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:46:13,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:46:13,300 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:46:13,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:46:13,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:46:13,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:46:13,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:46:13,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:46:13,301 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:46:13,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:46:13,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:46:13,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:46:13,301 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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-08-22 04:46:13,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:46:13,640 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:46:13,644 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:46:13,645 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:46:13,646 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:46:13,647 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-08-22 04:46:13,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ad4c7761/736cb649972b4ed79f3703092cffd9ac/FLAGfd220bbcc [2020-08-22 04:46:14,201 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:46:14,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs2f.c [2020-08-22 04:46:14,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ad4c7761/736cb649972b4ed79f3703092cffd9ac/FLAGfd220bbcc [2020-08-22 04:46:14,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ad4c7761/736cb649972b4ed79f3703092cffd9ac [2020-08-22 04:46:14,586 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:46:14,588 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:46:14,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:46:14,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:46:14,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:46:14,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:14,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e2018f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14, skipping insertion in model container [2020-08-22 04:46:14,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:14,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:46:14,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:46:14,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:46:14,828 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:46:14,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:46:14,989 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:46:14,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14 WrapperNode [2020-08-22 04:46:14,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:46:14,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:46:14,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:46:14,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:46:15,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:15,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:15,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:15,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:15,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:15,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:15,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (1/1) ... [2020-08-22 04:46:15,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:46:15,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:46:15,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:46:15,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:46:15,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (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 [2020-08-22 04:46:15,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:46:15,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:46:15,122 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 04:46:15,122 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 04:46:15,122 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:46:15,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:46:15,122 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 04:46:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 04:46:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 04:46:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 04:46:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 04:46:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:46:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 04:46:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 04:46:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 04:46:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 04:46:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 04:46:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:46:15,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:46:15,447 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:46:15,447 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 04:46:15,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:46:15 BoogieIcfgContainer [2020-08-22 04:46:15,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:46:15,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:46:15,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:46:15,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:46:15,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:46:14" (1/3) ... [2020-08-22 04:46:15,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f058cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:46:15, skipping insertion in model container [2020-08-22 04:46:15,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:14" (2/3) ... [2020-08-22 04:46:15,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f058cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:46:15, skipping insertion in model container [2020-08-22 04:46:15,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:46:15" (3/3) ... [2020-08-22 04:46:15,460 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-08-22 04:46:15,471 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:46:15,478 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 04:46:15,492 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 04:46:15,517 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:46:15,517 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:46:15,517 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:46:15,518 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:46:15,518 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:46:15,518 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:46:15,518 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:46:15,518 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:46:15,536 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-22 04:46:15,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 04:46:15,543 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:15,544 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] [2020-08-22 04:46:15,545 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:15,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:15,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-08-22 04:46:15,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:15,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211899233] [2020-08-22 04:46:15,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 04:46:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:15,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211899233] [2020-08-22 04:46:15,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:15,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 04:46:15,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922334293] [2020-08-22 04:46:15,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 04:46:15,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:15,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 04:46:15,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 04:46:15,793 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-08-22 04:46:15,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:15,916 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-22 04:46:15,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:46:15,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 04:46:15,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:15,925 INFO L225 Difference]: With dead ends: 56 [2020-08-22 04:46:15,926 INFO L226 Difference]: Without dead ends: 26 [2020-08-22 04:46:15,930 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 [2020-08-22 04:46:15,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-22 04:46:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-22 04:46:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-22 04:46:15,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-22 04:46:15,966 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-08-22 04:46:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:15,967 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-22 04:46:15,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 04:46:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-22 04:46:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 04:46:15,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:15,969 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] [2020-08-22 04:46:15,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:46:15,969 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:15,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:15,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-08-22 04:46:15,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:15,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748132656] [2020-08-22 04:46:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 04:46:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:16,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748132656] [2020-08-22 04:46:16,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:16,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:46:16,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347422565] [2020-08-22 04:46:16,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:46:16,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:16,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:46:16,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:46:16,085 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-08-22 04:46:16,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:16,216 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-22 04:46:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 04:46:16,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-22 04:46:16,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:16,218 INFO L225 Difference]: With dead ends: 45 [2020-08-22 04:46:16,218 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 04:46:16,219 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 [2020-08-22 04:46:16,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 04:46:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-22 04:46:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 04:46:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-22 04:46:16,228 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-08-22 04:46:16,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:16,229 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-22 04:46:16,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:46:16,229 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-22 04:46:16,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 04:46:16,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:16,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:16,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:46:16,231 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:16,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:16,232 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-08-22 04:46:16,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:16,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476903884] [2020-08-22 04:46:16,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 04:46:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 04:46:16,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476903884] [2020-08-22 04:46:16,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:16,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 04:46:16,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953650188] [2020-08-22 04:46:16,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 04:46:16,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:16,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 04:46:16,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:46:16,498 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-08-22 04:46:16,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:16,730 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-22 04:46:16,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 04:46:16,730 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-22 04:46:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:16,731 INFO L225 Difference]: With dead ends: 39 [2020-08-22 04:46:16,732 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 04:46:16,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-08-22 04:46:16,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 04:46:16,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-22 04:46:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 04:46:16,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-22 04:46:16,740 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-08-22 04:46:16,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:16,740 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-22 04:46:16,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 04:46:16,741 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-22 04:46:16,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 04:46:16,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:16,742 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:16,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 04:46:16,742 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:16,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:16,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-08-22 04:46:16,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:16,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377159233] [2020-08-22 04:46:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 04:46:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:16,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377159233] [2020-08-22 04:46:16,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:16,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 04:46:16,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484360467] [2020-08-22 04:46:16,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 04:46:16,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:16,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 04:46:16,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:46:16,844 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-08-22 04:46:17,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:17,003 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-08-22 04:46:17,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 04:46:17,004 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-08-22 04:46:17,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:17,005 INFO L225 Difference]: With dead ends: 54 [2020-08-22 04:46:17,005 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 04:46:17,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:46:17,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 04:46:17,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-22 04:46:17,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 04:46:17,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-08-22 04:46:17,013 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-08-22 04:46:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:17,014 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-08-22 04:46:17,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 04:46:17,014 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-08-22 04:46:17,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 04:46:17,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:17,015 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:17,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 04:46:17,016 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:17,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:17,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1781264291, now seen corresponding path program 2 times [2020-08-22 04:46:17,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:17,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786534309] [2020-08-22 04:46:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 04:46:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:17,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786534309] [2020-08-22 04:46:17,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:17,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 04:46:17,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96208177] [2020-08-22 04:46:17,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:46:17,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:17,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:46:17,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:46:17,157 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-08-22 04:46:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:17,254 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-08-22 04:46:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:46:17,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-22 04:46:17,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:17,256 INFO L225 Difference]: With dead ends: 55 [2020-08-22 04:46:17,256 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 04:46:17,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:46:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 04:46:17,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-08-22 04:46:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 04:46:17,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-08-22 04:46:17,264 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-08-22 04:46:17,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:17,264 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-08-22 04:46:17,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:46:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-08-22 04:46:17,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 04:46:17,266 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:17,266 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:17,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 04:46:17,266 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:17,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:17,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-08-22 04:46:17,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:17,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964626551] [2020-08-22 04:46:17,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 04:46:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:17,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964626551] [2020-08-22 04:46:17,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:17,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 04:46:17,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91397630] [2020-08-22 04:46:17,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 04:46:17,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:17,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 04:46:17,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:46:17,555 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 14 states. [2020-08-22 04:46:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:18,052 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-22 04:46:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 04:46:18,053 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-08-22 04:46:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:18,054 INFO L225 Difference]: With dead ends: 46 [2020-08-22 04:46:18,054 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 04:46:18,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-08-22 04:46:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 04:46:18,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-08-22 04:46:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 04:46:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-08-22 04:46:18,069 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2020-08-22 04:46:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:18,070 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-08-22 04:46:18,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 04:46:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-08-22 04:46:18,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 04:46:18,072 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:18,072 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:18,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 04:46:18,072 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:18,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-08-22 04:46:18,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:18,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252315945] [2020-08-22 04:46:18,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 04:46:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:18,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252315945] [2020-08-22 04:46:18,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:18,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 04:46:18,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402397787] [2020-08-22 04:46:18,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 04:46:18,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:18,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 04:46:18,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:46:18,178 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 10 states. [2020-08-22 04:46:18,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:18,363 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-08-22 04:46:18,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 04:46:18,364 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-08-22 04:46:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:18,365 INFO L225 Difference]: With dead ends: 66 [2020-08-22 04:46:18,365 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 04:46:18,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-22 04:46:18,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 04:46:18,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-08-22 04:46:18,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 04:46:18,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-22 04:46:18,373 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 36 [2020-08-22 04:46:18,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:18,374 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-22 04:46:18,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 04:46:18,374 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-22 04:46:18,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 04:46:18,375 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:18,375 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:18,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 04:46:18,376 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:18,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:18,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1680039082, now seen corresponding path program 3 times [2020-08-22 04:46:18,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:18,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583494528] [2020-08-22 04:46:18,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 04:46:18,428 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 04:46:18,428 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 04:46:18,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 04:46:18,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:46:18 BoogieIcfgContainer [2020-08-22 04:46:18,469 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 04:46:18,472 INFO L168 Benchmark]: Toolchain (without parser) took 3882.79 ms. Allocated memory was 140.0 MB in the beginning and 244.3 MB in the end (delta: 104.3 MB). Free memory was 102.7 MB in the beginning and 120.3 MB in the end (delta: -17.6 MB). Peak memory consumption was 86.8 MB. Max. memory is 7.1 GB. [2020-08-22 04:46:18,473 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 04:46:18,474 INFO L168 Benchmark]: CACSL2BoogieTranslator took 401.25 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 102.3 MB in the beginning and 183.9 MB in the end (delta: -81.6 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-08-22 04:46:18,475 INFO L168 Benchmark]: Boogie Preprocessor took 64.31 ms. Allocated memory is still 205.0 MB. Free memory was 183.9 MB in the beginning and 181.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-22 04:46:18,475 INFO L168 Benchmark]: RCFGBuilder took 396.08 ms. Allocated memory is still 205.0 MB. Free memory was 181.5 MB in the beginning and 164.1 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2020-08-22 04:46:18,476 INFO L168 Benchmark]: TraceAbstraction took 3016.20 ms. Allocated memory was 205.0 MB in the beginning and 244.3 MB in the end (delta: 39.3 MB). Free memory was 164.1 MB in the beginning and 120.3 MB in the end (delta: 43.8 MB). Peak memory consumption was 83.1 MB. Max. memory is 7.1 GB. [2020-08-22 04:46:18,481 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 401.25 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 102.3 MB in the beginning and 183.9 MB in the end (delta: -81.6 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 64.31 ms. Allocated memory is still 205.0 MB. Free memory was 183.9 MB in the beginning and 181.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 396.08 ms. Allocated memory is still 205.0 MB. Free memory was 181.5 MB in the beginning and 164.1 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3016.20 ms. Allocated memory was 205.0 MB in the beginning and 244.3 MB in the end (delta: 39.3 MB). Free memory was 164.1 MB in the beginning and 120.3 MB in the end (delta: 43.8 MB). Peak memory consumption was 83.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 [L29] COND TRUE i