/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.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/s1liff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:04:46,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:04:46,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:04:46,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 18:04:46,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 18:04:46,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 18:04:46,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 18:04:46,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 18:04:46,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 18:04:46,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 18:04:46,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 18:04:46,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 18:04:46,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:04:46,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:04:46,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:04:46,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:04:46,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:04:46,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:04:46,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:04:46,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:04:46,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:04:46,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:04:46,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:04:46,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:04:46,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 18:04:46,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 18:04:46,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 18:04:46,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 18:04:46,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 18:04:46,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 18:04:46,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 18:04:46,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 18:04:46,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 18:04:46,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 18:04:46,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 18:04:46,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 18:04:46,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 18:04:46,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 18:04:46,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:04:46,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:04:46,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:04:46,841 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 18:04:46,856 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:04:46,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:04:46,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:04:46,858 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:04:46,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:04:46,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:04:46,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:04:46,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:04:46,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:04:46,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:04:46,861 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:04:46,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:04:46,861 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:04:46,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:04:46,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:04:46,862 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:04:46,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:04:46,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:04:46,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:04:46,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:04:46,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:04:46,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:04:46,864 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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 [2020-07-17 18:04:47,202 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:04:47,216 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:04:47,219 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:04:47,221 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:04:47,221 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:04:47,222 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1liff.c [2020-07-17 18:04:47,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/624c26065/2bc83465c9b44c938f31b2860d514847/FLAG0e3a633ba [2020-07-17 18:04:47,716 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:04:47,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1liff.c [2020-07-17 18:04:47,724 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/624c26065/2bc83465c9b44c938f31b2860d514847/FLAG0e3a633ba [2020-07-17 18:04:48,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/624c26065/2bc83465c9b44c938f31b2860d514847 [2020-07-17 18:04:48,116 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:04:48,120 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:04:48,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:04:48,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:04:48,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:04:48,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:04:48" (1/1) ... [2020-07-17 18:04:48,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@732949eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:48, skipping insertion in model container [2020-07-17 18:04:48,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:04:48" (1/1) ... [2020-07-17 18:04:48,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:04:48,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:04:48,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:04:48,357 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:04:48,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:04:48,400 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:04:48,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:48 WrapperNode [2020-07-17 18:04:48,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:04:48,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:04:48,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:04:48,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:04:48,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:48" (1/1) ... [2020-07-17 18:04:48,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:48" (1/1) ... [2020-07-17 18:04:48,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:48" (1/1) ... [2020-07-17 18:04:48,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:48" (1/1) ... [2020-07-17 18:04:48,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:48" (1/1) ... [2020-07-17 18:04:48,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:48" (1/1) ... [2020-07-17 18:04:48,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:48" (1/1) ... [2020-07-17 18:04:48,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:04:48,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:04:48,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:04:48,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:04:48,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:04:48,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:04:48,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:04:48,582 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 18:04:48,582 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 18:04:48,582 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:04:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:04:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 18:04:48,582 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 18:04:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 18:04:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 18:04:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 18:04:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:04:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 18:04:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 18:04:48,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 18:04:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 18:04:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 18:04:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:04:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:04:48,869 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:04:48,869 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-17 18:04:48,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:04:48 BoogieIcfgContainer [2020-07-17 18:04:48,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:04:48,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:04:48,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:04:48,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:04:48,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:04:48" (1/3) ... [2020-07-17 18:04:48,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507e45bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:04:48, skipping insertion in model container [2020-07-17 18:04:48,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:48" (2/3) ... [2020-07-17 18:04:48,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507e45bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:04:48, skipping insertion in model container [2020-07-17 18:04:48,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:04:48" (3/3) ... [2020-07-17 18:04:48,893 INFO L109 eAbstractionObserver]: Analyzing ICFG s1liff.c [2020-07-17 18:04:48,922 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:04:48,942 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:04:48,974 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:04:48,998 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:04:48,998 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:04:48,998 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:04:48,998 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:04:48,999 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:04:48,999 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:04:48,999 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:04:48,999 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:04:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-07-17 18:04:49,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 18:04:49,027 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:49,028 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] [2020-07-17 18:04:49,029 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:49,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:49,035 INFO L82 PathProgramCache]: Analyzing trace with hash -2050446892, now seen corresponding path program 1 times [2020-07-17 18:04:49,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:49,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557057101] [2020-07-17 18:04:49,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:04:49,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557057101] [2020-07-17 18:04:49,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:04:49,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 18:04:49,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020647389] [2020-07-17 18:04:49,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 18:04:49,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:04:49,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 18:04:49,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 18:04:49,292 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 3 states. [2020-07-17 18:04:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:49,524 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2020-07-17 18:04:49,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 18:04:49,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-07-17 18:04:49,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:49,549 INFO L225 Difference]: With dead ends: 125 [2020-07-17 18:04:49,549 INFO L226 Difference]: Without dead ends: 59 [2020-07-17 18:04:49,557 INFO L675 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 [2020-07-17 18:04:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-17 18:04:49,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-17 18:04:49,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-17 18:04:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-07-17 18:04:49,633 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 33 [2020-07-17 18:04:49,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:49,634 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-07-17 18:04:49,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 18:04:49,634 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-07-17 18:04:49,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 18:04:49,636 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:49,636 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] [2020-07-17 18:04:49,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:04:49,637 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:49,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:49,638 INFO L82 PathProgramCache]: Analyzing trace with hash -341126016, now seen corresponding path program 1 times [2020-07-17 18:04:49,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:49,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471513553] [2020-07-17 18:04:49,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:04:49,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471513553] [2020-07-17 18:04:49,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:04:49,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 18:04:49,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122089653] [2020-07-17 18:04:49,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 18:04:49,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:04:49,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 18:04:49,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 18:04:49,769 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 5 states. [2020-07-17 18:04:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:49,998 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-07-17 18:04:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 18:04:49,999 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-17 18:04:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:50,001 INFO L225 Difference]: With dead ends: 115 [2020-07-17 18:04:50,001 INFO L226 Difference]: Without dead ends: 84 [2020-07-17 18:04:50,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-17 18:04:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-17 18:04:50,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2020-07-17 18:04:50,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-17 18:04:50,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-07-17 18:04:50,030 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 33 [2020-07-17 18:04:50,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:50,030 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-07-17 18:04:50,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 18:04:50,031 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-07-17 18:04:50,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-17 18:04:50,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:50,033 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:04:50,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 18:04:50,033 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:50,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:50,034 INFO L82 PathProgramCache]: Analyzing trace with hash 746418975, now seen corresponding path program 1 times [2020-07-17 18:04:50,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:50,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122286714] [2020-07-17 18:04:50,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:04:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:04:50,179 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 18:04:50,179 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 18:04:50,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 18:04:50,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 06:04:50 BoogieIcfgContainer [2020-07-17 18:04:50,231 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 18:04:50,234 INFO L168 Benchmark]: Toolchain (without parser) took 2114.99 ms. Allocated memory was 137.4 MB in the beginning and 234.4 MB in the end (delta: 97.0 MB). Free memory was 102.7 MB in the beginning and 194.3 MB in the end (delta: -91.6 MB). Peak memory consumption was 5.4 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:50,235 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-17 18:04:50,236 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.01 ms. Allocated memory is still 137.4 MB. Free memory was 102.3 MB in the beginning and 91.7 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:50,237 INFO L168 Benchmark]: Boogie Preprocessor took 125.41 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 91.7 MB in the beginning and 179.2 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:50,238 INFO L168 Benchmark]: RCFGBuilder took 349.27 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 159.1 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:50,239 INFO L168 Benchmark]: TraceAbstraction took 1353.63 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 158.4 MB in the beginning and 194.3 MB in the end (delta: -35.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 18:04:50,243 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 280.01 ms. Allocated memory is still 137.4 MB. Free memory was 102.3 MB in the beginning and 91.7 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.41 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 91.7 MB in the beginning and 179.2 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 349.27 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 159.1 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1353.63 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 158.4 MB in the beginning and 194.3 MB in the end (delta: -35.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=10, N=0] [L21] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=1, N=1] [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; VAL [\old(N)=0, N=1] [L26] long long sum[1]; VAL [\old(N)=0, N=1, sum={5:0}] [L27] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L29] sum[0] = N VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L30] COND TRUE i