/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/loops/array-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:34:58,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:34:58,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:34:58,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:34:58,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:34:58,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:34:58,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:34:58,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:34:58,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:34:58,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:34:58,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:34:58,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:34:58,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:34:58,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:34:58,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:34:58,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:34:58,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:34:58,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:34:58,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:34:58,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:34:58,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:34:58,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:34:58,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:34:58,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:34:58,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:34:58,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 06:34:58,406 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 06:34:58,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 06:34:58,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 06:34:58,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 06:34:58,411 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 06:34:58,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 06:34:58,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 06:34:58,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:34:58,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:34:58,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:34:58,415 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 06:34:58,436 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:34:58,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:34:58,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:34:58,443 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:34:58,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:34:58,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:34:58,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:34:58,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:34:58,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:34:58,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:34:58,445 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:34:58,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:34:58,446 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:34:58,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:34:58,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:34:58,447 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:34:58,447 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:34:58,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:34:58,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:34:58,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:34:58,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:34:58,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:34:58,448 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:34:58,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:34:58,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:34:58,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:34:58,885 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:34:58,886 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:34:58,887 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/array-2.c [2020-11-07 06:34:58,970 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34798d469/7e8fbb23d424422fb47bc03672638944/FLAG09b531528 [2020-11-07 06:34:59,696 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:34:59,697 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/array-2.c [2020-11-07 06:34:59,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34798d469/7e8fbb23d424422fb47bc03672638944/FLAG09b531528 [2020-11-07 06:35:00,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34798d469/7e8fbb23d424422fb47bc03672638944 [2020-11-07 06:35:00,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:35:00,078 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:35:00,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:00,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:35:00,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:35:00,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:00" (1/1) ... [2020-11-07 06:35:00,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5028439f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:00, skipping insertion in model container [2020-11-07 06:35:00,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:00" (1/1) ... [2020-11-07 06:35:00,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:35:00,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:35:00,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:00,294 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:35:00,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:00,334 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:35:00,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:00 WrapperNode [2020-11-07 06:35:00,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:00,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:35:00,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:35:00,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:35:00,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:00" (1/1) ... [2020-11-07 06:35:00,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:00" (1/1) ... [2020-11-07 06:35:00,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:00" (1/1) ... [2020-11-07 06:35:00,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:00" (1/1) ... [2020-11-07 06:35:00,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:00" (1/1) ... [2020-11-07 06:35:00,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:00" (1/1) ... [2020-11-07 06:35:00,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:00" (1/1) ... [2020-11-07 06:35:00,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:35:00,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:35:00,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:35:00,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:35:00,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:00" (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 06:35:00,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:35:00,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:35:00,466 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:35:00,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:35:00,467 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:35:00,467 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:35:00,467 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:35:00,467 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:35:00,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:35:00,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:35:00,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:35:00,468 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:35:00,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:35:00,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:35:00,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:35:00,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:35:00,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:35:00,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:35:00,795 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:35:00,808 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 06:35:00,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:00 BoogieIcfgContainer [2020-11-07 06:35:00,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:35:00,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:35:00,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:35:00,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:35:00,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:35:00" (1/3) ... [2020-11-07 06:35:00,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e74e1c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:00, skipping insertion in model container [2020-11-07 06:35:00,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:00" (2/3) ... [2020-11-07 06:35:00,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e74e1c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:00, skipping insertion in model container [2020-11-07 06:35:00,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:00" (3/3) ... [2020-11-07 06:35:00,837 INFO L111 eAbstractionObserver]: Analyzing ICFG array-2.c [2020-11-07 06:35:00,872 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:35:00,876 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:35:00,890 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:35:00,930 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:35:00,933 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:35:00,933 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:35:00,934 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:35:00,935 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:35:00,935 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:35:00,937 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:35:00,937 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:35:00,968 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-11-07 06:35:00,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-07 06:35:00,982 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:00,983 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] [2020-11-07 06:35:00,984 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:00,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1278543435, now seen corresponding path program 1 times [2020-11-07 06:35:01,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:01,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713988887] [2020-11-07 06:35:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:01,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:01,635 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 06:35:01,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713988887] [2020-11-07 06:35:01,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:01,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 06:35:01,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853407619] [2020-11-07 06:35:01,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 06:35:01,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:01,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 06:35:01,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:35:01,672 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 5 states. [2020-11-07 06:35:01,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:01,945 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2020-11-07 06:35:01,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 06:35:01,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-11-07 06:35:01,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:01,956 INFO L225 Difference]: With dead ends: 85 [2020-11-07 06:35:01,957 INFO L226 Difference]: Without dead ends: 55 [2020-11-07 06:35:01,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 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 06:35:01,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-07 06:35:02,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-11-07 06:35:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-07 06:35:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-11-07 06:35:02,018 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 28 [2020-11-07 06:35:02,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:02,019 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-11-07 06:35:02,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 06:35:02,022 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-11-07 06:35:02,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-07 06:35:02,024 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:02,024 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] [2020-11-07 06:35:02,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:35:02,025 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:02,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:02,026 INFO L82 PathProgramCache]: Analyzing trace with hash -117529283, now seen corresponding path program 1 times [2020-11-07 06:35:02,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:02,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419769620] [2020-11-07 06:35:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:02,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:02,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419769620] [2020-11-07 06:35:02,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:02,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-07 06:35:02,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241800510] [2020-11-07 06:35:02,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 06:35:02,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:02,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 06:35:02,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:35:02,640 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 12 states. [2020-11-07 06:35:03,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:03,068 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-11-07 06:35:03,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 06:35:03,069 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-11-07 06:35:03,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:03,071 INFO L225 Difference]: With dead ends: 68 [2020-11-07 06:35:03,071 INFO L226 Difference]: Without dead ends: 61 [2020-11-07 06:35:03,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-11-07 06:35:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-07 06:35:03,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-11-07 06:35:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-07 06:35:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-11-07 06:35:03,087 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 38 [2020-11-07 06:35:03,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:03,087 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-11-07 06:35:03,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 06:35:03,088 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-11-07 06:35:03,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-07 06:35:03,089 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:03,089 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] [2020-11-07 06:35:03,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:35:03,090 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:03,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:03,091 INFO L82 PathProgramCache]: Analyzing trace with hash 148052226, now seen corresponding path program 1 times [2020-11-07 06:35:03,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:03,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678491084] [2020-11-07 06:35:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:35:03,115 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:35:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:35:03,138 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:35:03,181 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 06:35:03,182 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 06:35:03,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:35:03,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:35:03 BoogieIcfgContainer [2020-11-07 06:35:03,247 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:35:03,250 INFO L168 Benchmark]: Toolchain (without parser) took 3176.06 ms. Allocated memory was 160.4 MB in the beginning and 221.2 MB in the end (delta: 60.8 MB). Free memory was 136.8 MB in the beginning and 175.4 MB in the end (delta: -38.6 MB). Peak memory consumption was 23.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:03,251 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 160.4 MB. Free memory is still 134.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:35:03,252 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.14 ms. Allocated memory is still 160.4 MB. Free memory was 136.0 MB in the beginning and 126.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:03,253 INFO L168 Benchmark]: Boogie Preprocessor took 40.98 ms. Allocated memory is still 160.4 MB. Free memory was 126.2 MB in the beginning and 124.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:03,254 INFO L168 Benchmark]: RCFGBuilder took 433.69 ms. Allocated memory is still 160.4 MB. Free memory was 124.8 MB in the beginning and 142.3 MB in the end (delta: -17.5 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:03,255 INFO L168 Benchmark]: TraceAbstraction took 2433.47 ms. Allocated memory was 160.4 MB in the beginning and 221.2 MB in the end (delta: 60.8 MB). Free memory was 142.3 MB in the beginning and 175.4 MB in the end (delta: -33.1 MB). Peak memory consumption was 27.7 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:03,260 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 160.4 MB. Free memory is still 134.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 252.14 ms. Allocated memory is still 160.4 MB. Free memory was 136.0 MB in the beginning and 126.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.98 ms. Allocated memory is still 160.4 MB. Free memory was 126.2 MB in the beginning and 124.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 433.69 ms. Allocated memory is still 160.4 MB. Free memory was 124.8 MB in the beginning and 142.3 MB in the end (delta: -17.5 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2433.47 ms. Allocated memory was 160.4 MB in the beginning and 221.2 MB in the end (delta: 60.8 MB). Free memory was 142.3 MB in the beginning and 175.4 MB in the end (delta: -33.1 MB). Peak memory consumption was 27.7 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: [L15] unsigned int SIZE=1; VAL [SIZE=1] [L16] unsigned int j,k; VAL [SIZE=1] [L17] int array[SIZE], menor; VAL [array={3:0}, SIZE=1] [L19] menor = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, array={3:0}, menor=0, SIZE=1] [L21] j=0 VAL [array={3:0}, j=0, menor=0, SIZE=1] [L21] COND TRUE jmenor) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] CALL reach_error() [L3] __assert_fail("0", "array-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 79 SDtfs, 167 SDslu, 221 SDs, 0 SdLazy, 240 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred 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, 20 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 9533 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1 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...