/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifncompf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:59:48,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:59:48,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:59:48,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:59:48,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:59:48,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:59:48,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:59:48,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:59:48,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:59:48,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:59:48,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:59:48,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:59:48,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:59:48,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:59:48,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:59:48,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:59:48,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:59:48,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:59:48,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:59:48,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:59:48,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:59:48,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:59:48,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:59:48,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:59:48,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 13:59:48,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 13:59:48,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 13:59:48,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 13:59:48,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 13:59:48,273 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 13:59:48,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 13:59:48,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 13:59:48,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 13:59:48,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 13:59:48,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 13:59:48,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 13:59:48,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 13:59:48,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 13:59:48,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:59:48,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:59:48,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:59:48,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 13:59:48,324 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:59:48,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:59:48,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:59:48,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:59:48,328 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:59:48,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:59:48,328 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:59:48,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:59:48,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:59:48,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:59:48,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:59:48,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:59:48,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:59:48,335 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:59:48,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:59:48,335 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:59:48,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:59:48,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:59:48,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:59:48,336 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:59:48,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:59:48,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:59:48,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:59:48,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:59:48,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:59:48,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:59:48,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:48,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:59:48,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:59:48,340 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 13:59:48,673 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:59:48,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:59:48,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:59:48,692 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:59:48,693 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:59:48,693 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifncompf.c [2020-07-21 13:59:48,777 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f9e661e3/c1ae0e3313e24085971b432504a10d4a/FLAG3f5ea491f [2020-07-21 13:59:49,299 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:59:49,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifncompf.c [2020-07-21 13:59:49,307 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f9e661e3/c1ae0e3313e24085971b432504a10d4a/FLAG3f5ea491f [2020-07-21 13:59:49,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f9e661e3/c1ae0e3313e24085971b432504a10d4a [2020-07-21 13:59:49,661 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:59:49,663 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:59:49,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:59:49,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:59:49,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:59:49,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:59:49" (1/1) ... [2020-07-21 13:59:49,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e620712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:49, skipping insertion in model container [2020-07-21 13:59:49,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:59:49" (1/1) ... [2020-07-21 13:59:49,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:59:49,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:59:49,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:59:49,923 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:59:49,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:59:49,974 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:59:49,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:49 WrapperNode [2020-07-21 13:59:49,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:59:49,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:59:49,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:59:49,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:59:50,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:49" (1/1) ... [2020-07-21 13:59:50,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:49" (1/1) ... [2020-07-21 13:59:50,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:49" (1/1) ... [2020-07-21 13:59:50,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:49" (1/1) ... [2020-07-21 13:59:50,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:49" (1/1) ... [2020-07-21 13:59:50,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:49" (1/1) ... [2020-07-21 13:59:50,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:49" (1/1) ... [2020-07-21 13:59:50,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:59:50,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:59:50,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:59:50,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:59:50,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:59:50,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:59:50,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:59:50,287 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 13:59:50,287 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 13:59:50,287 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:59:50,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:59:50,288 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 13:59:50,288 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 13:59:50,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 13:59:50,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:59:50,289 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 13:59:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:59:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 13:59:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 13:59:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 13:59:50,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:59:50,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:59:50,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 13:59:50,687 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:59:50,688 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-21 13:59:50,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:59:50 BoogieIcfgContainer [2020-07-21 13:59:50,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:59:50,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:59:50,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:59:50,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:59:50,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:59:49" (1/3) ... [2020-07-21 13:59:50,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5883e0f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:59:50, skipping insertion in model container [2020-07-21 13:59:50,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:49" (2/3) ... [2020-07-21 13:59:50,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5883e0f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:59:50, skipping insertion in model container [2020-07-21 13:59:50,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:59:50" (3/3) ... [2020-07-21 13:59:50,701 INFO L109 eAbstractionObserver]: Analyzing ICFG ifncompf.c [2020-07-21 13:59:50,712 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:59:50,721 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:59:50,735 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:59:50,761 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:59:50,761 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:59:50,761 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:59:50,761 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:59:50,762 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:59:50,762 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:59:50,762 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:59:50,762 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:59:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-21 13:59:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 13:59:50,788 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:50,789 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] [2020-07-21 13:59:50,789 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:50,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:50,795 INFO L82 PathProgramCache]: Analyzing trace with hash -794599326, now seen corresponding path program 1 times [2020-07-21 13:59:50,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:50,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617958664] [2020-07-21 13:59:50,803 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:50,906 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:59:50,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:59:50,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:59:50,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:59:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:59:50,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:59:50,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617958664] [2020-07-21 13:59:50,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:59:50,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 13:59:50,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546323480] [2020-07-21 13:59:50,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 13:59:50,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:59:51,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 13:59:51,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 13:59:51,011 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-07-21 13:59:51,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:59:51,203 INFO L93 Difference]: Finished difference Result 87 states and 124 transitions. [2020-07-21 13:59:51,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 13:59:51,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-21 13:59:51,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:59:51,222 INFO L225 Difference]: With dead ends: 87 [2020-07-21 13:59:51,223 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 13:59:51,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 13:59:51,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 13:59:51,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-07-21 13:59:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 13:59:51,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-07-21 13:59:51,332 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 24 [2020-07-21 13:59:51,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:59:51,333 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-07-21 13:59:51,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 13:59:51,333 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-07-21 13:59:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 13:59:51,339 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:51,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:59:51,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:51,556 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:51,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:51,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1796917477, now seen corresponding path program 1 times [2020-07-21 13:59:51,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:51,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052333153] [2020-07-21 13:59:51,559 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:51,645 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:59:51,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:59:51,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:59:51,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:59:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 13:59:51,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:59:51,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052333153] [2020-07-21 13:59:51,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:59:51,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:59:51,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347005665] [2020-07-21 13:59:51,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:59:51,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:59:51,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:59:51,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:59:51,678 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 3 states. [2020-07-21 13:59:51,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:59:51,771 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2020-07-21 13:59:51,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:59:51,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-07-21 13:59:51,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:59:51,774 INFO L225 Difference]: With dead ends: 72 [2020-07-21 13:59:51,774 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 13:59:51,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:59:51,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 13:59:51,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-07-21 13:59:51,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 13:59:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-21 13:59:51,786 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 33 [2020-07-21 13:59:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:59:51,787 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-21 13:59:51,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:59:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-21 13:59:51,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 13:59:51,789 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:51,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:59:52,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:52,003 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:52,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:52,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1817991449, now seen corresponding path program 1 times [2020-07-21 13:59:52,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:52,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175134733] [2020-07-21 13:59:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:52,081 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:59:52,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 13:59:52,082 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:59:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 13:59:52,100 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:59:52,127 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 13:59:52,127 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 13:59:52,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:52,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:59:52 BoogieIcfgContainer [2020-07-21 13:59:52,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:59:52,392 INFO L168 Benchmark]: Toolchain (without parser) took 2728.84 ms. Allocated memory was 145.8 MB in the beginning and 234.4 MB in the end (delta: 88.6 MB). Free memory was 103.2 MB in the beginning and 196.3 MB in the end (delta: -93.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 13:59:52,393 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 13:59:52,394 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.58 ms. Allocated memory is still 145.8 MB. Free memory was 102.8 MB in the beginning and 92.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-21 13:59:52,395 INFO L168 Benchmark]: Boogie Preprocessor took 224.50 ms. Allocated memory was 145.8 MB in the beginning and 205.5 MB in the end (delta: 59.8 MB). Free memory was 92.1 MB in the beginning and 182.9 MB in the end (delta: -90.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 13:59:52,396 INFO L168 Benchmark]: RCFGBuilder took 491.36 ms. Allocated memory is still 205.5 MB. Free memory was 182.9 MB in the beginning and 163.9 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. [2020-07-21 13:59:52,397 INFO L168 Benchmark]: TraceAbstraction took 1696.14 ms. Allocated memory was 205.5 MB in the beginning and 234.4 MB in the end (delta: 28.8 MB). Free memory was 163.3 MB in the beginning and 196.3 MB in the end (delta: -33.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 13:59:52,401 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 311.58 ms. Allocated memory is still 145.8 MB. Free memory was 102.8 MB in the beginning and 92.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 224.50 ms. Allocated memory was 145.8 MB in the beginning and 205.5 MB in the end (delta: 59.8 MB). Free memory was 92.1 MB in the beginning and 182.9 MB in the end (delta: -90.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 491.36 ms. Allocated memory is still 205.5 MB. Free memory was 182.9 MB in the beginning and 163.9 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1696.14 ms. Allocated memory was 205.5 MB in the beginning and 234.4 MB in the end (delta: 28.8 MB). Free memory was 163.3 MB in the beginning and 196.3 MB in the end (delta: -33.0 MB). There was no memory consumed. 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; VAL [\old(N)=3, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L28] long long *c = malloc(sizeof(long long)*N); [L30] i=0 VAL [\old(N)=0, a={-1:0}, b={1:0}, c={-2:0}, i=0, malloc(sizeof(long long)*N)={1:0}, malloc(sizeof(long long)*N)={-2:0}, malloc(sizeof(long long)*N)={-1:0}, N=1] [L30] COND TRUE i