/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/array-fpi/brs1f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:34:03,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:34:03,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:34:03,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 06:34:03,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:34:03,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:34:03,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:34:03,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:34:03,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:34:03,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:34:03,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:34:03,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:34:03,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:34:03,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:34:03,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:34:03,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:34:03,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:34:03,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:34:03,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:34:03,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:34:03,451 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 06:34:03,473 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:34:03,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:34:03,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:34:03,477 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:34:03,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:34:03,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:34:03,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:34:03,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:34:03,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:34:03,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:34:03,479 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:34:03,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:34:03,480 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:34:03,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:34:03,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:34:03,481 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:34:03,481 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:34:03,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:34:03,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:34:03,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:34:03,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:34:03,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:34:03,482 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:34:03,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:34:03,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:34:03,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:34:03,957 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:34:03,958 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:34:03,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs1f.c [2020-11-07 06:34:04,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ef4b726b/a8d3ec2073b444e19a0a9204da055784/FLAGedb8d0756 [2020-11-07 06:34:04,650 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:34:04,651 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs1f.c [2020-11-07 06:34:04,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ef4b726b/a8d3ec2073b444e19a0a9204da055784/FLAGedb8d0756 [2020-11-07 06:34:04,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ef4b726b/a8d3ec2073b444e19a0a9204da055784 [2020-11-07 06:34:04,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:34:04,687 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:34:04,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:04,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:34:04,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:34:04,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:04" (1/1) ... [2020-11-07 06:34:04,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@344291fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:04, skipping insertion in model container [2020-11-07 06:34:04,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:04" (1/1) ... [2020-11-07 06:34:04,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:34:04,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:34:04,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:05,009 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:34:05,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:05,069 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:34:05,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05 WrapperNode [2020-11-07 06:34:05,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:05,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:34:05,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:34:05,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:34:05,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (1/1) ... [2020-11-07 06:34:05,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (1/1) ... [2020-11-07 06:34:05,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (1/1) ... [2020-11-07 06:34:05,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (1/1) ... [2020-11-07 06:34:05,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (1/1) ... [2020-11-07 06:34:05,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (1/1) ... [2020-11-07 06:34:05,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (1/1) ... [2020-11-07 06:34:05,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:34:05,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:34:05,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:34:05,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:34:05,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (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 06:34:05,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:34:05,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:34:05,263 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:34:05,263 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 06:34:05,263 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:34:05,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:34:05,264 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:34:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:34:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:34:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:34:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 06:34:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:34:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:34:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 06:34:05,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:34:05,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 06:34:05,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:34:05,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:34:05,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:34:05,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:34:05,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:34:05,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:34:05,846 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:34:05,846 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-07 06:34:05,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:05 BoogieIcfgContainer [2020-11-07 06:34:05,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:34:05,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:34:05,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:34:05,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:34:05,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:34:04" (1/3) ... [2020-11-07 06:34:05,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4030ac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:05, skipping insertion in model container [2020-11-07 06:34:05,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (2/3) ... [2020-11-07 06:34:05,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4030ac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:05, skipping insertion in model container [2020-11-07 06:34:05,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:05" (3/3) ... [2020-11-07 06:34:05,858 INFO L111 eAbstractionObserver]: Analyzing ICFG brs1f.c [2020-11-07 06:34:05,875 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:34:05,879 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:34:05,892 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:34:05,917 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:34:05,917 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:34:05,918 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:34:05,918 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:34:05,918 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:34:05,918 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:34:05,918 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:34:05,918 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:34:05,936 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-11-07 06:34:05,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 06:34:05,947 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:05,948 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, 1, 1, 1, 1, 1] [2020-11-07 06:34:05,951 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:05,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:05,959 INFO L82 PathProgramCache]: Analyzing trace with hash -341341850, now seen corresponding path program 1 times [2020-11-07 06:34:05,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:05,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616679068] [2020-11-07 06:34:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:06,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:06,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:06,292 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 06:34:06,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616679068] [2020-11-07 06:34:06,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:06,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:34:06,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851003570] [2020-11-07 06:34:06,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:34:06,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:06,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:34:06,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:34:06,320 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-11-07 06:34:06,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:06,530 INFO L93 Difference]: Finished difference Result 110 states and 126 transitions. [2020-11-07 06:34:06,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:34:06,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-11-07 06:34:06,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:06,541 INFO L225 Difference]: With dead ends: 110 [2020-11-07 06:34:06,541 INFO L226 Difference]: Without dead ends: 52 [2020-11-07 06:34:06,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:34:06,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-07 06:34:06,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-11-07 06:34:06,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-07 06:34:06,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-11-07 06:34:06,599 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 36 [2020-11-07 06:34:06,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:06,599 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-11-07 06:34:06,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:34:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-11-07 06:34:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 06:34:06,601 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:06,602 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, 1, 1, 1, 1, 1] [2020-11-07 06:34:06,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:34:06,602 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:06,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:06,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1000671319, now seen corresponding path program 1 times [2020-11-07 06:34:06,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:06,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652327294] [2020-11-07 06:34:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:06,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:06,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:06,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:06,820 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 06:34:06,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652327294] [2020-11-07 06:34:06,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:06,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 06:34:06,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679023840] [2020-11-07 06:34:06,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 06:34:06,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:06,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 06:34:06,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:34:06,826 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 5 states. [2020-11-07 06:34:07,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:07,211 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-11-07 06:34:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 06:34:07,212 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-11-07 06:34:07,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:07,214 INFO L225 Difference]: With dead ends: 80 [2020-11-07 06:34:07,214 INFO L226 Difference]: Without dead ends: 61 [2020-11-07 06:34:07,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:34:07,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-07 06:34:07,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-11-07 06:34:07,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-07 06:34:07,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-11-07 06:34:07,232 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 36 [2020-11-07 06:34:07,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:07,232 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-11-07 06:34:07,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 06:34:07,232 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-11-07 06:34:07,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-07 06:34:07,234 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:07,235 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:07,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:34:07,235 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:07,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:07,236 INFO L82 PathProgramCache]: Analyzing trace with hash -546938271, now seen corresponding path program 1 times [2020-11-07 06:34:07,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:07,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074487601] [2020-11-07 06:34:07,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:34:07,281 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:34:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:34:07,324 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:34:07,363 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 06:34:07,363 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 06:34:07,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:34:07,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:34:07 BoogieIcfgContainer [2020-11-07 06:34:07,419 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:34:07,422 INFO L168 Benchmark]: Toolchain (without parser) took 2738.38 ms. Allocated memory was 168.8 MB in the beginning and 205.5 MB in the end (delta: 36.7 MB). Free memory was 144.7 MB in the beginning and 164.4 MB in the end (delta: -19.8 MB). Peak memory consumption was 18.5 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:07,423 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 168.8 MB. Free memory is still 142.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:34:07,424 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.37 ms. Allocated memory is still 168.8 MB. Free memory was 143.9 MB in the beginning and 134.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:07,425 INFO L168 Benchmark]: Boogie Preprocessor took 84.53 ms. Allocated memory is still 168.8 MB. Free memory was 134.1 MB in the beginning and 132.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:07,426 INFO L168 Benchmark]: RCFGBuilder took 691.75 ms. Allocated memory is still 168.8 MB. Free memory was 132.4 MB in the beginning and 147.7 MB in the end (delta: -15.3 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:07,427 INFO L168 Benchmark]: TraceAbstraction took 1568.93 ms. Allocated memory was 168.8 MB in the beginning and 205.5 MB in the end (delta: 36.7 MB). Free memory was 147.1 MB in the beginning and 164.4 MB in the end (delta: -17.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:07,432 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 168.8 MB. Free memory is still 142.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 381.37 ms. Allocated memory is still 168.8 MB. Free memory was 143.9 MB in the beginning and 134.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 84.53 ms. Allocated memory is still 168.8 MB. Free memory was 134.1 MB in the beginning and 132.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 691.75 ms. Allocated memory is still 168.8 MB. Free memory was 132.4 MB in the beginning and 147.7 MB in the end (delta: -15.3 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1568.93 ms. Allocated memory was 168.8 MB in the beginning and 205.5 MB in the end (delta: 36.7 MB). Free memory was 147.1 MB in the beginning and 164.4 MB in the end (delta: -17.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=51, N=0] [L23] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=1, N=1] [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L27] int i; VAL [\old(N)=0, N=1] [L28] long long sum[1]; VAL [\old(N)=0, N=1, sum={3:0}] [L29] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={3:0}] [L31] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={3:0}] [L31] COND TRUE i