/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/s42iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:47:26,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:47:26,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:47:26,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:47:26,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:47:26,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:47:26,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:47:26,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:47:26,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:47:26,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:47:26,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:47:26,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:47:26,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:47:26,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:47:26,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:47:26,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:47:26,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:47:26,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:47:26,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:47:26,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:47:26,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:47:26,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:47:26,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:47:26,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:47:26,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:47:26,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:47:26,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:47:26,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:47:26,189 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 11:47:26,223 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:47:26,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:47:26,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:47:26,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:47:26,227 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:47:26,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:47:26,227 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:47:26,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:47:26,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:47:26,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:47:26,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:47:26,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:47:26,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:47:26,230 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:47:26,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:47:26,230 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:47:26,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:47:26,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:47:26,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:47:26,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:47:26,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:47:26,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:47:26,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:47:26,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:47:26,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:47:26,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:47:26,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:26,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:47:26,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:47:26,234 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 11:47:26,535 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:47:26,550 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:47:26,553 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:47:26,555 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:47:26,556 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:47:26,557 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s42iff.c [2020-07-20 11:47:26,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31728eeaa/908b8ba9dd494cc8a9d53158ee031db9/FLAG030506f50 [2020-07-20 11:47:27,133 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:47:27,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s42iff.c [2020-07-20 11:47:27,141 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31728eeaa/908b8ba9dd494cc8a9d53158ee031db9/FLAG030506f50 [2020-07-20 11:47:27,446 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31728eeaa/908b8ba9dd494cc8a9d53158ee031db9 [2020-07-20 11:47:27,458 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:47:27,462 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:47:27,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:27,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:47:27,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:47:27,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:27" (1/1) ... [2020-07-20 11:47:27,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bf95c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:27, skipping insertion in model container [2020-07-20 11:47:27,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:27" (1/1) ... [2020-07-20 11:47:27,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:47:27,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:47:27,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:27,699 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:47:27,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:27,745 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:47:27,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:27 WrapperNode [2020-07-20 11:47:27,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:27,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:47:27,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:47:27,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:47:27,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:27" (1/1) ... [2020-07-20 11:47:27,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:27" (1/1) ... [2020-07-20 11:47:27,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:27" (1/1) ... [2020-07-20 11:47:27,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:27" (1/1) ... [2020-07-20 11:47:27,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:27" (1/1) ... [2020-07-20 11:47:27,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:27" (1/1) ... [2020-07-20 11:47:27,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:27" (1/1) ... [2020-07-20 11:47:27,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:47:27,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:47:27,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:47:27,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:47:27,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:27" (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 11:47:27,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:47:27,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:47:27,986 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:47:27,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:47:27,986 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:47:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:47:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:47:27,986 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:47:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:47:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:47:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:47:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:47:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:47:27,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:47:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:47:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:47:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:47:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:47:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:47:28,326 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:47:28,327 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 11:47:28,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:28 BoogieIcfgContainer [2020-07-20 11:47:28,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:47:28,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:47:28,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:47:28,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:47:28,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:47:27" (1/3) ... [2020-07-20 11:47:28,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8078b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:28, skipping insertion in model container [2020-07-20 11:47:28,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:27" (2/3) ... [2020-07-20 11:47:28,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8078b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:28, skipping insertion in model container [2020-07-20 11:47:28,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:28" (3/3) ... [2020-07-20 11:47:28,340 INFO L109 eAbstractionObserver]: Analyzing ICFG s42iff.c [2020-07-20 11:47:28,353 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:47:28,361 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:47:28,378 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:47:28,409 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:47:28,409 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:47:28,409 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:47:28,410 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:47:28,410 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:47:28,410 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:47:28,410 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:47:28,410 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:47:28,431 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-20 11:47:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:47:28,437 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:28,438 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 11:47:28,439 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:28,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:28,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2033030480, now seen corresponding path program 1 times [2020-07-20 11:47:28,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:28,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873434194] [2020-07-20 11:47:28,454 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 11:47:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:28,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:47:28,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:28,585 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 11:47:28,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:28,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873434194] [2020-07-20 11:47:28,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:28,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:47:28,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786905571] [2020-07-20 11:47:28,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:47:28,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:28,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:47:28,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:28,613 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-07-20 11:47:28,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:28,641 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-20 11:47:28,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:47:28,643 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2020-07-20 11:47:28,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:28,652 INFO L225 Difference]: With dead ends: 62 [2020-07-20 11:47:28,653 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 11:47:28,657 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 11:47:28,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 11:47:28,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 11:47:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 11:47:28,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-20 11:47:28,694 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2020-07-20 11:47:28,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:28,695 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-20 11:47:28,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:47:28,695 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-20 11:47:28,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:47:28,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:28,697 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 11:47:28,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:28,903 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:28,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:28,905 INFO L82 PathProgramCache]: Analyzing trace with hash 706992569, now seen corresponding path program 1 times [2020-07-20 11:47:28,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:28,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379183512] [2020-07-20 11:47:28,907 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 11:47:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:28,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:47:28,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:29,048 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 11:47:29,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:29,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379183512] [2020-07-20 11:47:29,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:29,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:47:29,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192380848] [2020-07-20 11:47:29,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:47:29,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:29,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:47:29,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:47:29,056 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 4 states. [2020-07-20 11:47:29,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:29,196 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-07-20 11:47:29,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:47:29,197 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-07-20 11:47:29,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:29,199 INFO L225 Difference]: With dead ends: 51 [2020-07-20 11:47:29,199 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 11:47:29,201 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 11:47:29,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 11:47:29,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-07-20 11:47:29,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 11:47:29,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-20 11:47:29,220 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2020-07-20 11:47:29,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:29,221 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-20 11:47:29,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:47:29,222 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-20 11:47:29,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 11:47:29,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:29,224 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] [2020-07-20 11:47:29,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:29,431 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:29,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:29,432 INFO L82 PathProgramCache]: Analyzing trace with hash 284203188, now seen corresponding path program 1 times [2020-07-20 11:47:29,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:29,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118019343] [2020-07-20 11:47:29,434 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 11:47:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:29,488 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:29,509 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:29,539 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:47:29,539 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:47:29,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:29,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:47:29 BoogieIcfgContainer [2020-07-20 11:47:29,799 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:47:29,802 INFO L168 Benchmark]: Toolchain (without parser) took 2341.30 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 102.5 MB in the beginning and 102.0 MB in the end (delta: 550.4 kB). Peak memory consumption was 57.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:29,804 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 145.8 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:47:29,805 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.66 ms. Allocated memory is still 145.8 MB. Free memory was 102.1 MB in the beginning and 91.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:29,806 INFO L168 Benchmark]: Boogie Preprocessor took 175.44 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 91.4 MB in the beginning and 180.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:29,807 INFO L168 Benchmark]: RCFGBuilder took 409.49 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 161.9 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:29,808 INFO L168 Benchmark]: TraceAbstraction took 1466.75 ms. Allocated memory is still 202.9 MB. Free memory was 161.9 MB in the beginning and 102.0 MB in the end (delta: 59.9 MB). Peak memory consumption was 59.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:29,812 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 145.8 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.66 ms. Allocated memory is still 145.8 MB. Free memory was 102.1 MB in the beginning and 91.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 175.44 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 91.4 MB in the beginning and 180.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 409.49 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 161.9 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1466.75 ms. Allocated memory is still 202.9 MB. Free memory was 161.9 MB in the beginning and 102.0 MB in the end (delta: 59.9 MB). Peak memory consumption was 59.9 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)=10, 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