/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/s22iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:38:46,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:38:46,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:38:46,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:38:46,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:38:46,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:38:46,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:38:46,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:38:46,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:38:46,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:38:46,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:38:46,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:38:46,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:38:46,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:38:46,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:38:46,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:38:46,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:38:46,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:38:46,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:38:46,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:38:46,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:38:46,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:38:46,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:38:46,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:38:46,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:38:46,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:38:46,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:38:46,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:38:46,993 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 11:38:47,030 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:38:47,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:38:47,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:38:47,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:38:47,035 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:38:47,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:38:47,035 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:38:47,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:38:47,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:38:47,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:38:47,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:38:47,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:38:47,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:38:47,040 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:38:47,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:38:47,040 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:38:47,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:38:47,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:38:47,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:38:47,043 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:38:47,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:38:47,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:38:47,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:38:47,043 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:38:47,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:38:47,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:38:47,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:38:47,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:38:47,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:38:47,045 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 [2020-07-21 11:38:47,370 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:38:47,384 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:38:47,387 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:38:47,389 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:38:47,389 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:38:47,390 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s22iff.c [2020-07-21 11:38:47,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be3de4323/9730f03ccf0c4e53aa0661fcbf9cde9a/FLAG393ef7913 [2020-07-21 11:38:47,938 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:38:47,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s22iff.c [2020-07-21 11:38:47,946 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be3de4323/9730f03ccf0c4e53aa0661fcbf9cde9a/FLAG393ef7913 [2020-07-21 11:38:48,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be3de4323/9730f03ccf0c4e53aa0661fcbf9cde9a [2020-07-21 11:38:48,289 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:38:48,292 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:38:48,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:38:48,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:38:48,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:38:48,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:38:48" (1/1) ... [2020-07-21 11:38:48,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@778246e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:48, skipping insertion in model container [2020-07-21 11:38:48,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:38:48" (1/1) ... [2020-07-21 11:38:48,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:38:48,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:38:48,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:38:48,512 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:38:48,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:38:48,551 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:38:48,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:48 WrapperNode [2020-07-21 11:38:48,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:38:48,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:38:48,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:38:48,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:38:48,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:48" (1/1) ... [2020-07-21 11:38:48,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:48" (1/1) ... [2020-07-21 11:38:48,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:48" (1/1) ... [2020-07-21 11:38:48,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:48" (1/1) ... [2020-07-21 11:38:48,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:48" (1/1) ... [2020-07-21 11:38:48,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:48" (1/1) ... [2020-07-21 11:38:48,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:48" (1/1) ... [2020-07-21 11:38:48,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:38:48,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:38:48,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:38:48,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:38:48,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:48" (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 11:38:48,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:38:48,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:38:48,754 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 11:38:48,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:38:48,755 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:38:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:38:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:38:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 11:38:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:38:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:38:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:38:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:38:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:38:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:38:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:38:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:38:48,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:38:48,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:38:48,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:38:49,084 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:38:49,084 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 11:38:49,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:38:49 BoogieIcfgContainer [2020-07-21 11:38:49,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:38:49,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:38:49,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:38:49,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:38:49,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:38:48" (1/3) ... [2020-07-21 11:38:49,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c53279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:38:49, skipping insertion in model container [2020-07-21 11:38:49,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:38:48" (2/3) ... [2020-07-21 11:38:49,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c53279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:38:49, skipping insertion in model container [2020-07-21 11:38:49,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:38:49" (3/3) ... [2020-07-21 11:38:49,110 INFO L109 eAbstractionObserver]: Analyzing ICFG s22iff.c [2020-07-21 11:38:49,136 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:38:49,151 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:38:49,170 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:38:49,201 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:38:49,201 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:38:49,202 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:38:49,202 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:38:49,202 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:38:49,202 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:38:49,202 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:38:49,202 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:38:49,230 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-21 11:38:49,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:38:49,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:38:49,237 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] [2020-07-21 11:38:49,237 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:38:49,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:38:49,243 INFO L82 PathProgramCache]: Analyzing trace with hash 2033030480, now seen corresponding path program 1 times [2020-07-21 11:38:49,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:38:49,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132609275] [2020-07-21 11:38:49,251 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 [2020-07-21 11:38:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:38:49,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:38:49,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:38:49,410 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 11:38:49,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:38:49,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132609275] [2020-07-21 11:38:49,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:38:49,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:38:49,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010222765] [2020-07-21 11:38:49,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:38:49,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:38:49,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:38:49,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:38:49,439 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-07-21 11:38:49,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:38:49,468 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-21 11:38:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:38:49,470 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2020-07-21 11:38:49,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:38:49,480 INFO L225 Difference]: With dead ends: 62 [2020-07-21 11:38:49,480 INFO L226 Difference]: Without dead ends: 29 [2020-07-21 11:38:49,484 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 [2020-07-21 11:38:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-21 11:38:49,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-21 11:38:49,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 11:38:49,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-21 11:38:49,529 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2020-07-21 11:38:49,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:38:49,529 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-21 11:38:49,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:38:49,530 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-21 11:38:49,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:38:49,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:38:49,531 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] [2020-07-21 11:38:49,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:38:49,747 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:38:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:38:49,749 INFO L82 PathProgramCache]: Analyzing trace with hash 706992569, now seen corresponding path program 1 times [2020-07-21 11:38:49,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:38:49,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53485318] [2020-07-21 11:38:49,751 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 [2020-07-21 11:38:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:38:49,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:38:49,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:38:49,865 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 11:38:49,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:38:49,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53485318] [2020-07-21 11:38:49,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:38:49,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:38:49,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757669672] [2020-07-21 11:38:49,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:38:49,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:38:49,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:38:49,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:38:49,870 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 4 states. [2020-07-21 11:38:50,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:38:50,009 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-07-21 11:38:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:38:50,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-07-21 11:38:50,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:38:50,012 INFO L225 Difference]: With dead ends: 51 [2020-07-21 11:38:50,012 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 11:38:50,013 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 [2020-07-21 11:38:50,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 11:38:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-07-21 11:38:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 11:38:50,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-21 11:38:50,029 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2020-07-21 11:38:50,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:38:50,030 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-21 11:38:50,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:38:50,031 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-21 11:38:50,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 11:38:50,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:38:50,034 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] [2020-07-21 11:38:50,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:38:50,250 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:38:50,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:38:50,252 INFO L82 PathProgramCache]: Analyzing trace with hash 284203188, now seen corresponding path program 1 times [2020-07-21 11:38:50,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:38:50,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130348874] [2020-07-21 11:38:50,253 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 [2020-07-21 11:38:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:38:50,306 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:38:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:38:50,326 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:38:50,355 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:38:50,356 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:38:50,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:38:50,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:38:50 BoogieIcfgContainer [2020-07-21 11:38:50,624 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:38:50,627 INFO L168 Benchmark]: Toolchain (without parser) took 2335.34 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 104.5 MB in the beginning and 101.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 67.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:50,628 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 11:38:50,628 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.58 ms. Allocated memory is still 139.5 MB. Free memory was 104.1 MB in the beginning and 93.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:50,630 INFO L168 Benchmark]: Boogie Preprocessor took 141.69 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 93.3 MB in the beginning and 181.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:50,631 INFO L168 Benchmark]: RCFGBuilder took 395.82 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 162.9 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:50,631 INFO L168 Benchmark]: TraceAbstraction took 1529.30 ms. Allocated memory is still 203.9 MB. Free memory was 162.9 MB in the beginning and 101.6 MB in the end (delta: 61.2 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:38:50,635 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.58 ms. Allocated memory is still 139.5 MB. Free memory was 104.1 MB in the beginning and 93.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.69 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 93.3 MB in the beginning and 181.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 395.82 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 162.9 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1529.30 ms. Allocated memory is still 203.9 MB. Free memory was 162.9 MB in the beginning and 101.6 MB in the end (delta: 61.2 MB). Peak memory consumption was 61.2 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] = 1 [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