/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_2x3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 05:09:12,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 05:09:12,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 05:09:12,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 05:09:12,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 05:09:12,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 05:09:12,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 05:09:12,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 05:09:12,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 05:09:12,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 05:09:12,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 05:09:12,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 05:09:12,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 05:09:12,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 05:09:12,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 05:09:12,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 05:09:12,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 05:09:12,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 05:09:12,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 05:09:12,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 05:09:12,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 05:09:12,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 05:09:12,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 05:09:12,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 05:09:12,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 05:09:12,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 05:09:12,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 05:09:12,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 05:09:12,447 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 05:09:12,470 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 05:09:12,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 05:09:12,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 05:09:12,477 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 05:09:12,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 05:09:12,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 05:09:12,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 05:09:12,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 05:09:12,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 05:09:12,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 05:09:12,479 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 05:09:12,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 05:09:12,480 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 05:09:12,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 05:09:12,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 05:09:12,481 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 05:09:12,481 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 05:09:12,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 05:09:12,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:09:12,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 05:09:12,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 05:09:12,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 05:09:12,482 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 05:09:12,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 05:09:12,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 05:09:12,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 05:09:12,995 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 05:09:12,996 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 05:09:12,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-1.c [2020-11-07 05:09:13,102 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21edc268e/7d9cb9a9e51240c0ae08e6a16d127246/FLAG8a5b783eb [2020-11-07 05:09:13,831 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 05:09:13,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_2x3-1.c [2020-11-07 05:09:13,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21edc268e/7d9cb9a9e51240c0ae08e6a16d127246/FLAG8a5b783eb [2020-11-07 05:09:14,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21edc268e/7d9cb9a9e51240c0ae08e6a16d127246 [2020-11-07 05:09:14,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 05:09:14,240 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 05:09:14,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 05:09:14,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 05:09:14,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 05:09:14,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:09:14" (1/1) ... [2020-11-07 05:09:14,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bdb64e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:09:14, skipping insertion in model container [2020-11-07 05:09:14,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:09:14" (1/1) ... [2020-11-07 05:09:14,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 05:09:14,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 05:09:14,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:09:14,591 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 05:09:14,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:09:14,625 INFO L208 MainTranslator]: Completed translation [2020-11-07 05:09:14,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:09:14 WrapperNode [2020-11-07 05:09:14,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 05:09:14,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 05:09:14,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 05:09:14,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 05:09:14,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:09:14" (1/1) ... [2020-11-07 05:09:14,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:09:14" (1/1) ... [2020-11-07 05:09:14,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:09:14" (1/1) ... [2020-11-07 05:09:14,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:09:14" (1/1) ... [2020-11-07 05:09:14,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:09:14" (1/1) ... [2020-11-07 05:09:14,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:09:14" (1/1) ... [2020-11-07 05:09:14,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:09:14" (1/1) ... [2020-11-07 05:09:14,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 05:09:14,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 05:09:14,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 05:09:14,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 05:09:14,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:09:14" (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 [2020-11-07 05:09:14,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 05:09:14,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 05:09:14,763 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 05:09:14,763 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-11-07 05:09:14,763 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 05:09:14,763 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 05:09:14,764 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 05:09:14,764 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 05:09:14,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 05:09:14,764 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-11-07 05:09:14,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 05:09:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 05:09:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 05:09:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 05:09:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 05:09:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 05:09:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 05:09:15,057 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 05:09:15,058 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 05:09:15,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:09:15 BoogieIcfgContainer [2020-11-07 05:09:15,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 05:09:15,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 05:09:15,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 05:09:15,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 05:09:15,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:09:14" (1/3) ... [2020-11-07 05:09:15,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c49822c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:09:15, skipping insertion in model container [2020-11-07 05:09:15,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:09:14" (2/3) ... [2020-11-07 05:09:15,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c49822c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:09:15, skipping insertion in model container [2020-11-07 05:09:15,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:09:15" (3/3) ... [2020-11-07 05:09:15,098 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_2x3-1.c [2020-11-07 05:09:15,119 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 05:09:15,123 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 05:09:15,139 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 05:09:15,167 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 05:09:15,167 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 05:09:15,167 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 05:09:15,168 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 05:09:15,168 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 05:09:15,168 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 05:09:15,168 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 05:09:15,168 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 05:09:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-11-07 05:09:15,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-07 05:09:15,197 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:09:15,199 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] [2020-11-07 05:09:15,200 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:09:15,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:09:15,216 INFO L82 PathProgramCache]: Analyzing trace with hash -342472451, now seen corresponding path program 1 times [2020-11-07 05:09:15,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:09:15,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508496029] [2020-11-07 05:09:15,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:09:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:09:15,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:09:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:09:15,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 05:09:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:09:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:09:15,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508496029] [2020-11-07 05:09:15,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:09:15,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 05:09:15,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470493082] [2020-11-07 05:09:15,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 05:09:15,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:09:15,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 05:09:15,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 05:09:15,647 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 6 states. [2020-11-07 05:09:15,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:09:15,975 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-11-07 05:09:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 05:09:15,977 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-11-07 05:09:15,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:09:15,990 INFO L225 Difference]: With dead ends: 52 [2020-11-07 05:09:15,990 INFO L226 Difference]: Without dead ends: 34 [2020-11-07 05:09:15,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 05:09:16,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-07 05:09:16,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-07 05:09:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-07 05:09:16,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-11-07 05:09:16,065 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2020-11-07 05:09:16,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:09:16,065 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-11-07 05:09:16,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 05:09:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-11-07 05:09:16,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 05:09:16,069 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:09:16,069 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2020-11-07 05:09:16,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 05:09:16,070 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:09:16,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:09:16,072 INFO L82 PathProgramCache]: Analyzing trace with hash 653425116, now seen corresponding path program 1 times [2020-11-07 05:09:16,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:09:16,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137562222] [2020-11-07 05:09:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:09:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:09:16,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:09:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:09:16,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-07 05:09:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:09:16,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 05:09:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:09:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-07 05:09:16,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137562222] [2020-11-07 05:09:16,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 05:09:16,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-07 05:09:16,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112278921] [2020-11-07 05:09:16,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 05:09:16,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:09:16,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 05:09:16,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-07 05:09:16,398 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 7 states. [2020-11-07 05:09:16,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:09:16,691 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-11-07 05:09:16,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 05:09:16,692 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-11-07 05:09:16,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:09:16,694 INFO L225 Difference]: With dead ends: 46 [2020-11-07 05:09:16,694 INFO L226 Difference]: Without dead ends: 39 [2020-11-07 05:09:16,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-11-07 05:09:16,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-07 05:09:16,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-07 05:09:16,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-07 05:09:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-11-07 05:09:16,711 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-11-07 05:09:16,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:09:16,711 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-11-07 05:09:16,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 05:09:16,712 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-11-07 05:09:16,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-07 05:09:16,713 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:09:16,714 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 05:09:16,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 05:09:16,714 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:09:16,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:09:16,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1221623283, now seen corresponding path program 2 times [2020-11-07 05:09:16,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:09:16,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385805031] [2020-11-07 05:09:16,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:09:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:09:16,747 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:09:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:09:16,776 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:09:16,812 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 05:09:16,814 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 05:09:16,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 05:09:16,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 05:09:16 BoogieIcfgContainer [2020-11-07 05:09:16,895 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 05:09:16,898 INFO L168 Benchmark]: Toolchain (without parser) took 2664.88 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 94.0 MB in the end (delta: 32.5 MB). Peak memory consumption was 33.8 MB. Max. memory is 8.0 GB. [2020-11-07 05:09:16,899 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 125.4 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 05:09:16,900 INFO L168 Benchmark]: CACSL2BoogieTranslator took 380.98 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 05:09:16,901 INFO L168 Benchmark]: Boogie Preprocessor took 37.88 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 05:09:16,903 INFO L168 Benchmark]: RCFGBuilder took 419.41 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 134.1 MB in the end (delta: -18.6 MB). Peak memory consumption was 17.0 MB. Max. memory is 8.0 GB. [2020-11-07 05:09:16,904 INFO L168 Benchmark]: TraceAbstraction took 1807.13 ms. Allocated memory is still 151.0 MB. Free memory was 134.1 MB in the beginning and 94.0 MB in the end (delta: 40.1 MB). Peak memory consumption was 40.9 MB. Max. memory is 8.0 GB. [2020-11-07 05:09:16,909 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 125.4 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 380.98 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.88 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 419.41 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 134.1 MB in the end (delta: -18.6 MB). Peak memory consumption was 17.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1807.13 ms. Allocated memory is still 151.0 MB. Free memory was 134.1 MB in the beginning and 94.0 MB in the end (delta: 40.1 MB). Peak memory consumption was 40.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int a = 2; VAL [a=2] [L15] int b = 3; VAL [a=2, b=3] [L16] CALL, EXPR sum(a, b) VAL [\old(m)=3, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=2, m=3, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=1, m=4, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=0] [L6] COND TRUE n <= 0 VAL [\old(m)=5, \old(n)=0, m=5, n=0] [L7] return m + n; VAL [\old(m)=5, \old(n)=0, \result=5, m=5, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=1, m=4, n=1, sum(n - 1, m + 1)=5] [L9] return sum(n - 1, m + 1); VAL [\old(m)=4, \old(n)=1, \result=5, m=4, n=1, sum(n - 1, m + 1)=5] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=2, m=3, n=2, sum(n - 1, m + 1)=5] [L9] return sum(n - 1, m + 1); VAL [\old(m)=3, \old(n)=2, \result=5, m=3, n=2, sum(n - 1, m + 1)=5] [L16] RET, EXPR sum(a, b) VAL [a=2, b=3, sum(a, b)=5] [L16] int result = sum(a, b); VAL [a=2, b=3, result=5, sum(a, b)=5] [L17] COND TRUE result == a + b VAL [a=2, b=3, result=5] [L18] CALL reach_error() [L3] __assert_fail("0", "sum_2x3-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 57 SDtfs, 70 SDslu, 93 SDs, 0 SdLazy, 117 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 61 ConstructedInterpolants, 0 QuantifiedInterpolants, 5145 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 3/5 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...