/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s4liff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:23:39,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:23:39,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:23:39,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:23:39,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:23:39,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:23:39,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:23:39,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:23:39,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:23:39,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:23:39,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:23:39,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:23:39,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:23:39,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:23:39,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:23:39,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:23:39,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:23:39,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:23:39,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:23:39,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:23:39,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:23:39,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:23:39,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:23:39,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:23:39,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 16:23:39,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:23:39,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:23:39,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:23:39,151 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 16:23:39,201 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:23:39,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:23:39,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:23:39,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:23:39,203 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:23:39,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:23:39,204 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:23:39,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:23:39,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:23:39,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:23:39,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:23:39,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:23:39,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:23:39,205 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:23:39,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:23:39,205 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:23:39,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:23:39,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:23:39,209 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:23:39,209 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:23:39,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:23:39,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:23:39,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:23:39,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:23:39,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:23:39,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:23:39,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:23:39,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:23:39,213 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:23:39,213 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 16:23:39,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:23:39,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:23:39,546 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:23:39,555 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:23:39,555 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:23:39,556 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4liff.c [2020-08-18 16:23:39,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/15be1202b/76441a2bd2a642039bb4706525c3f0a1/FLAG7ae22f5c6 [2020-08-18 16:23:40,054 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:23:40,054 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s4liff.c [2020-08-18 16:23:40,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/15be1202b/76441a2bd2a642039bb4706525c3f0a1/FLAG7ae22f5c6 [2020-08-18 16:23:40,391 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/15be1202b/76441a2bd2a642039bb4706525c3f0a1 [2020-08-18 16:23:40,402 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:23:40,403 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:23:40,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:23:40,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:23:40,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:23:40,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:23:40" (1/1) ... [2020-08-18 16:23:40,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201c87a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:40, skipping insertion in model container [2020-08-18 16:23:40,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:23:40" (1/1) ... [2020-08-18 16:23:40,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:23:40,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:23:40,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:23:40,726 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:23:40,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:23:40,882 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:23:40,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:40 WrapperNode [2020-08-18 16:23:40,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:23:40,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:23:40,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:23:40,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:23:40,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:40" (1/1) ... [2020-08-18 16:23:40,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:40" (1/1) ... [2020-08-18 16:23:40,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:40" (1/1) ... [2020-08-18 16:23:40,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:40" (1/1) ... [2020-08-18 16:23:40,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:40" (1/1) ... [2020-08-18 16:23:40,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:40" (1/1) ... [2020-08-18 16:23:40,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:40" (1/1) ... [2020-08-18 16:23:40,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:23:40,944 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:23:40,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:23:40,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:23:40,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 16:23:40,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:23:40,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:23:40,998 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 16:23:40,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 16:23:40,998 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:23:40,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:23:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 16:23:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 16:23:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 16:23:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:23:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 16:23:40,999 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:23:41,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 16:23:41,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 16:23:41,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:23:41,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:23:41,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:23:41,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:23:41,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:23:41,247 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:23:41,247 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-18 16:23:41,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:23:41 BoogieIcfgContainer [2020-08-18 16:23:41,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:23:41,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:23:41,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:23:41,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:23:41,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:23:40" (1/3) ... [2020-08-18 16:23:41,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a0ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:23:41, skipping insertion in model container [2020-08-18 16:23:41,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:23:40" (2/3) ... [2020-08-18 16:23:41,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a0ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:23:41, skipping insertion in model container [2020-08-18 16:23:41,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:23:41" (3/3) ... [2020-08-18 16:23:41,261 INFO L109 eAbstractionObserver]: Analyzing ICFG s4liff.c [2020-08-18 16:23:41,273 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:23:41,281 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:23:41,300 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:23:41,333 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:23:41,333 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:23:41,333 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:23:41,333 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:23:41,334 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:23:41,334 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:23:41,334 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:23:41,334 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:23:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-18 16:23:41,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 16:23:41,363 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:41,364 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] [2020-08-18 16:23:41,364 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:41,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:41,371 INFO L82 PathProgramCache]: Analyzing trace with hash -88121349, now seen corresponding path program 1 times [2020-08-18 16:23:41,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:41,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022203201] [2020-08-18 16:23:41,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:41,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:23:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:41,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 16:23:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:23:41,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022203201] [2020-08-18 16:23:41,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:23:41,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:23:41,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197555772] [2020-08-18 16:23:41,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:23:41,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:23:41,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:23:41,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:23:41,631 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-18 16:23:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:23:41,784 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-08-18 16:23:41,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:23:41,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 16:23:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:23:41,804 INFO L225 Difference]: With dead ends: 60 [2020-08-18 16:23:41,805 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 16:23:41,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:23:41,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 16:23:41,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-18 16:23:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 16:23:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-08-18 16:23:41,846 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-08-18 16:23:41,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:23:41,847 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-08-18 16:23:41,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:23:41,848 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-08-18 16:23:41,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 16:23:41,849 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:41,849 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] [2020-08-18 16:23:41,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:23:41,850 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:41,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1099238599, now seen corresponding path program 1 times [2020-08-18 16:23:41,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:41,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852087476] [2020-08-18 16:23:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:41,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:23:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:41,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 16:23:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:23:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:23:41,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852087476] [2020-08-18 16:23:41,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:23:41,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:23:41,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661267588] [2020-08-18 16:23:41,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:23:41,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:23:41,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:23:41,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:23:41,978 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-08-18 16:23:42,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:23:42,117 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-08-18 16:23:42,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 16:23:42,118 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-08-18 16:23:42,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:23:42,120 INFO L225 Difference]: With dead ends: 48 [2020-08-18 16:23:42,120 INFO L226 Difference]: Without dead ends: 35 [2020-08-18 16:23:42,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:23:42,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-18 16:23:42,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-08-18 16:23:42,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 16:23:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-08-18 16:23:42,131 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-08-18 16:23:42,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:23:42,132 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-08-18 16:23:42,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:23:42,132 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-08-18 16:23:42,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 16:23:42,133 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:23:42,133 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] [2020-08-18 16:23:42,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:23:42,134 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:23:42,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:23:42,134 INFO L82 PathProgramCache]: Analyzing trace with hash 188437731, now seen corresponding path program 1 times [2020-08-18 16:23:42,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:23:42,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660780119] [2020-08-18 16:23:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:23:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 16:23:42,185 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 16:23:42,185 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 16:23:42,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:23:42,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:23:42 BoogieIcfgContainer [2020-08-18 16:23:42,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:23:42,231 INFO L168 Benchmark]: Toolchain (without parser) took 1824.24 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 103.7 MB in the beginning and 108.9 MB in the end (delta: -5.3 MB). Peak memory consumption was 58.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:42,233 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-18 16:23:42,235 INFO L168 Benchmark]: CACSL2BoogieTranslator took 478.66 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 103.3 MB in the beginning and 184.5 MB in the end (delta: -81.2 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:42,236 INFO L168 Benchmark]: Boogie Preprocessor took 60.04 ms. Allocated memory is still 205.5 MB. Free memory was 184.5 MB in the beginning and 182.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:42,238 INFO L168 Benchmark]: RCFGBuilder took 307.46 ms. Allocated memory is still 205.5 MB. Free memory was 182.2 MB in the beginning and 164.8 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:42,240 INFO L168 Benchmark]: TraceAbstraction took 972.82 ms. Allocated memory is still 205.5 MB. Free memory was 164.2 MB in the beginning and 108.9 MB in the end (delta: 55.2 MB). Peak memory consumption was 55.2 MB. Max. memory is 7.1 GB. [2020-08-18 16:23:42,249 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 478.66 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 103.3 MB in the beginning and 184.5 MB in the end (delta: -81.2 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 60.04 ms. Allocated memory is still 205.5 MB. Free memory was 184.5 MB in the beginning and 182.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 307.46 ms. Allocated memory is still 205.5 MB. Free memory was 182.2 MB in the beginning and 164.8 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 972.82 ms. Allocated memory is still 205.5 MB. Free memory was 164.2 MB in the beginning and 108.9 MB in the end (delta: 55.2 MB). Peak memory consumption was 55.2 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; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = N [L30] i=0 [L30] COND TRUE i