/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/eqn4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:38:19,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:38:19,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:38:19,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:38:19,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:38:19,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:38:19,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:38:19,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:38:19,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:38:19,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:38:19,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:38:19,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:38:19,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:38:19,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:38:19,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:38:19,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:38:19,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:38:19,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:38:19,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:38:19,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:38:19,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:38:19,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:38:19,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:38:19,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:38:19,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 01:38:19,359 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 01:38:19,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 01:38:19,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 01:38:19,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 01:38:19,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 01:38:19,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 01:38:19,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 01:38:19,363 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 01:38:19,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 01:38:19,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 01:38:19,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 01:38:19,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 01:38:19,366 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 01:38:19,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:38:19,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:38:19,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:38:19,369 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 01:38:19,385 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:38:19,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:38:19,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:38:19,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:38:19,387 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:38:19,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:38:19,387 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:38:19,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:38:19,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:38:19,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:38:19,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:38:19,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:38:19,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:38:19,389 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:38:19,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:38:19,389 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:38:19,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:38:19,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:38:19,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:38:19,390 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:38:19,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:38:19,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:38:19,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:38:19,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:38:19,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:38:19,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:38:19,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:19,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:38:19,392 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:38:19,392 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 -> BIGGEST_EQUIVALENCE_CLASS 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 -> 4 [2020-07-21 01:38:19,697 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:38:19,711 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:38:19,715 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:38:19,716 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:38:19,717 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:38:19,717 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn4f.c [2020-07-21 01:38:19,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbad21d74/78f0cf30184840bfac97e747fda78531/FLAG605684e54 [2020-07-21 01:38:20,279 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:38:20,280 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn4f.c [2020-07-21 01:38:20,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbad21d74/78f0cf30184840bfac97e747fda78531/FLAG605684e54 [2020-07-21 01:38:20,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbad21d74/78f0cf30184840bfac97e747fda78531 [2020-07-21 01:38:20,679 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:38:20,682 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:38:20,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:38:20,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:38:20,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:38:20,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:38:20" (1/1) ... [2020-07-21 01:38:20,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@164c7927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:20, skipping insertion in model container [2020-07-21 01:38:20,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:38:20" (1/1) ... [2020-07-21 01:38:20,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:38:20,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:38:20,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:38:20,930 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:38:20,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:38:20,964 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:38:20,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:20 WrapperNode [2020-07-21 01:38:20,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:38:20,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:38:20,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:38:20,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:38:21,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:20" (1/1) ... [2020-07-21 01:38:21,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:20" (1/1) ... [2020-07-21 01:38:21,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:20" (1/1) ... [2020-07-21 01:38:21,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:20" (1/1) ... [2020-07-21 01:38:21,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:20" (1/1) ... [2020-07-21 01:38:21,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:20" (1/1) ... [2020-07-21 01:38:21,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:20" (1/1) ... [2020-07-21 01:38:21,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:38:21,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:38:21,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:38:21,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:38:21,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:20" (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 01:38:21,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:38:21,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:38:21,163 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:38:21,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:38:21,163 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:38:21,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:38:21,164 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:38:21,164 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:38:21,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:38:21,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:38:21,164 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 01:38:21,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:38:21,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 01:38:21,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 01:38:21,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 01:38:21,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:38:21,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:38:21,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:38:21,460 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:38:21,460 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 01:38:21,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:38:21 BoogieIcfgContainer [2020-07-21 01:38:21,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:38:21,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:38:21,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:38:21,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:38:21,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:38:20" (1/3) ... [2020-07-21 01:38:21,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b103d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:38:21, skipping insertion in model container [2020-07-21 01:38:21,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:20" (2/3) ... [2020-07-21 01:38:21,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b103d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:38:21, skipping insertion in model container [2020-07-21 01:38:21,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:38:21" (3/3) ... [2020-07-21 01:38:21,473 INFO L109 eAbstractionObserver]: Analyzing ICFG eqn4f.c [2020-07-21 01:38:21,484 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:38:21,491 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:38:21,506 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:38:21,532 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:38:21,532 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:38:21,532 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:38:21,532 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:38:21,532 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:38:21,533 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:38:21,533 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:38:21,533 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:38:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-21 01:38:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 01:38:21,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:21,568 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] [2020-07-21 01:38:21,569 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:21,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:21,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-07-21 01:38:21,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:21,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120168996] [2020-07-21 01:38:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 01:38:21,707 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:38:21,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:21,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:38:21,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:21,743 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 01:38:21,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:38:21,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120168996] [2020-07-21 01:38:21,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:38:21,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:38:21,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249301276] [2020-07-21 01:38:21,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:38:21,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:21,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:38:21,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:38:21,774 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2020-07-21 01:38:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:21,807 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-07-21 01:38:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:38:21,809 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-21 01:38:21,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:21,827 INFO L225 Difference]: With dead ends: 58 [2020-07-21 01:38:21,828 INFO L226 Difference]: Without dead ends: 29 [2020-07-21 01:38:21,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:38:21,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-21 01:38:21,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-21 01:38:21,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 01:38:21,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-07-21 01:38:21,907 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-07-21 01:38:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:21,908 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-07-21 01:38:21,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:38:21,908 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-07-21 01:38:21,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 01:38:21,910 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:21,911 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] [2020-07-21 01:38:22,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:22,127 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:22,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:22,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-07-21 01:38:22,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:22,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027690363] [2020-07-21 01:38:22,131 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 01:38:22,211 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:38:22,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:38:22,212 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:38:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:38:22,241 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:38:22,285 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:38:22,285 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:38:22,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:22,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:38:22 BoogieIcfgContainer [2020-07-21 01:38:22,543 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:38:22,546 INFO L168 Benchmark]: Toolchain (without parser) took 1864.07 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 101.3 MB in the beginning and 122.6 MB in the end (delta: -21.3 MB). Peak memory consumption was 35.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:22,547 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 01:38:22,548 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.66 ms. Allocated memory is still 144.7 MB. Free memory was 100.9 MB in the beginning and 90.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:22,550 INFO L168 Benchmark]: Boogie Preprocessor took 132.85 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 90.5 MB in the beginning and 178.3 MB in the end (delta: -87.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:22,551 INFO L168 Benchmark]: RCFGBuilder took 361.24 ms. Allocated memory is still 201.3 MB. Free memory was 178.3 MB in the beginning and 161.6 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:22,552 INFO L168 Benchmark]: TraceAbstraction took 1076.86 ms. Allocated memory is still 201.3 MB. Free memory was 161.0 MB in the beginning and 122.6 MB in the end (delta: 38.3 MB). Peak memory consumption was 38.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:22,556 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 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 281.66 ms. Allocated memory is still 144.7 MB. Free memory was 100.9 MB in the beginning and 90.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.85 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 90.5 MB in the beginning and 178.3 MB in the end (delta: -87.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 361.24 ms. Allocated memory is still 201.3 MB. Free memory was 178.3 MB in the beginning and 161.6 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1076.86 ms. Allocated memory is still 201.3 MB. Free memory was 161.0 MB in the beginning and 122.6 MB in the end (delta: 38.3 MB). Peak memory consumption was 38.3 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; 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); [L29] a[0] = 8 [L30] b[0] = 0 [L31] i=1 VAL [\old(N)=0, a={-1:0}, b={1:0}, i=1, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={1:0}, N=1] [L31] COND FALSE !(i