/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s2liff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:47:18,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:47:18,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:47:18,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:47:18,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:47:18,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:47:18,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:47:18,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:47:18,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:47:18,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:47:18,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:47:18,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:47:18,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:47:18,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:47:18,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:47:18,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:47:18,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:47:18,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:47:18,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:47:18,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:47:18,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:47:18,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:47:18,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:47:18,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:47:18,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:47:18,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:47:18,933 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:47:18,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:47:18,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:47:18,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:47:18,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:47:18,937 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:47:18,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:47:18,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:47:18,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:47:18,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:47:18,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:47:18,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:47:18,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:47:18,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:47:18,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:47:18,945 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 [2020-07-20 11:47:18,964 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:47:18,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:47:18,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:47:18,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:47:18,967 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:47:18,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:47:18,968 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:47:18,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:47:18,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:47:18,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:47:18,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:47:18,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:47:18,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:47:18,969 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:47:18,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:47:18,971 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:47:18,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:47:18,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:47:18,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:47:18,972 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:47:18,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:47:18,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:47:18,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:47:18,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:47:18,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:47:18,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:47:18,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:18,974 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:47:18,974 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:47:18,974 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 -> NOT_INCREMENTALLY [2020-07-20 11:47:19,288 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:47:19,303 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:47:19,307 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:47:19,309 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:47:19,310 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:47:19,311 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2liff.c [2020-07-20 11:47:19,403 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f050b8f1/79da65c250bb4732b87d43c74cb5240c/FLAGff14e5506 [2020-07-20 11:47:19,979 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:47:19,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s2liff.c [2020-07-20 11:47:19,988 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f050b8f1/79da65c250bb4732b87d43c74cb5240c/FLAGff14e5506 [2020-07-20 11:47:20,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f050b8f1/79da65c250bb4732b87d43c74cb5240c [2020-07-20 11:47:20,331 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:47:20,335 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:47:20,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:20,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:47:20,342 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:47:20,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:20" (1/1) ... [2020-07-20 11:47:20,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f4b94ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:20, skipping insertion in model container [2020-07-20 11:47:20,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:20" (1/1) ... [2020-07-20 11:47:20,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:47:20,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:47:20,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:20,625 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:47:20,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:20,673 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:47:20,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:20 WrapperNode [2020-07-20 11:47:20,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:20,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:47:20,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:47:20,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:47:20,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:20" (1/1) ... [2020-07-20 11:47:20,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:20" (1/1) ... [2020-07-20 11:47:20,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:20" (1/1) ... [2020-07-20 11:47:20,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:20" (1/1) ... [2020-07-20 11:47:20,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:20" (1/1) ... [2020-07-20 11:47:20,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:20" (1/1) ... [2020-07-20 11:47:20,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:20" (1/1) ... [2020-07-20 11:47:20,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:47:20,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:47:20,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:47:20,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:47:20,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:20" (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 [2020-07-20 11:47:20,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:47:20,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:47:20,901 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:47:20,901 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:47:20,901 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:47:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:47:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:47:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:47:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:47:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:47:20,902 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:47:20,903 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:47:20,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:47:20,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:47:20,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:47:20,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:47:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:47:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:47:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:47:21,280 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:47:21,280 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 11:47:21,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:21 BoogieIcfgContainer [2020-07-20 11:47:21,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:47:21,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:47:21,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:47:21,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:47:21,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:47:20" (1/3) ... [2020-07-20 11:47:21,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e12677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:21, skipping insertion in model container [2020-07-20 11:47:21,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:20" (2/3) ... [2020-07-20 11:47:21,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e12677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:21, skipping insertion in model container [2020-07-20 11:47:21,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:21" (3/3) ... [2020-07-20 11:47:21,297 INFO L109 eAbstractionObserver]: Analyzing ICFG s2liff.c [2020-07-20 11:47:21,310 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:47:21,318 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:47:21,333 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:47:21,358 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:47:21,358 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:47:21,358 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:47:21,359 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:47:21,359 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:47:21,359 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:47:21,359 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:47:21,359 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:47:21,380 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-20 11:47:21,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:47:21,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:21,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:21,389 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:21,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:21,395 INFO L82 PathProgramCache]: Analyzing trace with hash -88121349, now seen corresponding path program 1 times [2020-07-20 11:47:21,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:21,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222519354] [2020-07-20 11:47:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 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 [2020-07-20 11:47:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:21,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:47:21,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:47:21,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:21,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222519354] [2020-07-20 11:47:21,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:21,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:47:21,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471320259] [2020-07-20 11:47:21,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:47:21,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:21,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:47:21,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:21,577 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-07-20 11:47:21,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:21,611 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-07-20 11:47:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:47:21,613 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2020-07-20 11:47:21,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:21,624 INFO L225 Difference]: With dead ends: 60 [2020-07-20 11:47:21,624 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 11:47:21,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:21,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 11:47:21,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 11:47:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 11:47:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-20 11:47:21,681 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-07-20 11:47:21,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:21,681 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-20 11:47:21,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:47:21,682 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-20 11:47:21,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:47:21,683 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:21,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:21,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:21,899 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:21,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:21,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1099238599, now seen corresponding path program 1 times [2020-07-20 11:47:21,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:21,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853668484] [2020-07-20 11:47:21,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 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 [2020-07-20 11:47:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:21,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:47:21,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:47:22,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:22,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853668484] [2020-07-20 11:47:22,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:22,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:47:22,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786835859] [2020-07-20 11:47:22,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:47:22,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:22,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:47:22,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:47:22,045 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 4 states. [2020-07-20 11:47:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:22,152 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-07-20 11:47:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:47:22,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-07-20 11:47:22,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:22,155 INFO L225 Difference]: With dead ends: 48 [2020-07-20 11:47:22,155 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 11:47:22,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:47:22,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 11:47:22,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-07-20 11:47:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 11:47:22,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-07-20 11:47:22,166 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-07-20 11:47:22,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:22,167 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-07-20 11:47:22,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:47:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-07-20 11:47:22,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 11:47:22,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:22,169 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] [2020-07-20 11:47:22,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:22,383 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:22,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:22,384 INFO L82 PathProgramCache]: Analyzing trace with hash 188437731, now seen corresponding path program 1 times [2020-07-20 11:47:22,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:22,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660272443] [2020-07-20 11:47:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 11:47:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:22,440 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:22,465 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:22,516 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:47:22,517 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:47:22,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:22,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:47:22 BoogieIcfgContainer [2020-07-20 11:47:22,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:47:22,785 INFO L168 Benchmark]: Toolchain (without parser) took 2451.44 ms. Allocated memory was 140.0 MB in the beginning and 201.3 MB in the end (delta: 61.3 MB). Free memory was 102.2 MB in the beginning and 100.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:22,786 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 11:47:22,787 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.73 ms. Allocated memory is still 140.0 MB. Free memory was 101.7 MB in the beginning and 91.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:22,788 INFO L168 Benchmark]: Boogie Preprocessor took 143.56 ms. Allocated memory was 140.0 MB in the beginning and 201.3 MB in the end (delta: 61.3 MB). Free memory was 91.1 MB in the beginning and 178.7 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:22,789 INFO L168 Benchmark]: RCFGBuilder took 466.90 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 161.3 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:22,790 INFO L168 Benchmark]: TraceAbstraction took 1495.88 ms. Allocated memory is still 201.3 MB. Free memory was 160.7 MB in the beginning and 100.9 MB in the end (delta: 59.8 MB). Peak memory consumption was 59.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:22,795 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 337.73 ms. Allocated memory is still 140.0 MB. Free memory was 101.7 MB in the beginning and 91.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 143.56 ms. Allocated memory was 140.0 MB in the beginning and 201.3 MB in the end (delta: 61.3 MB). Free memory was 91.1 MB in the beginning and 178.7 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 466.90 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 161.3 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1495.88 ms. Allocated memory is still 201.3 MB. Free memory was 160.7 MB in the beginning and 100.9 MB in the end (delta: 59.8 MB). Peak memory consumption was 59.8 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)=7, 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 sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = N [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L30] COND TRUE i