/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/s42iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:04:58,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:04:58,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:04:58,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 18:04:58,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 18:04:58,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 18:04:58,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 18:04:58,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 18:04:58,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 18:04:58,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 18:04:58,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 18:04:58,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 18:04:58,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:04:58,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:04:58,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:04:58,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:04:58,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:04:58,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:04:58,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:04:58,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:04:58,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:04:58,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:04:58,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:04:58,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:04:58,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 18:04:58,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 18:04:58,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 18:04:58,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 18:04:58,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 18:04:58,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 18:04:58,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 18:04:58,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 18:04:58,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 18:04:58,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 18:04:58,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 18:04:58,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 18:04:58,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 18:04:58,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 18:04:58,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:04:58,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:04:58,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:04:58,530 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 18:04:58,557 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:04:58,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:04:58,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:04:58,561 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:04:58,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:04:58,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:04:58,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:04:58,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:04:58,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:04:58,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:04:58,562 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:04:58,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:04:58,563 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:04:58,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:04:58,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:04:58,564 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:04:58,564 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:04:58,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:04:58,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:04:58,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:04:58,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:04:58,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:04:58,568 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 18:04:58,841 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:04:58,861 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:04:58,864 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:04:58,866 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:04:58,866 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:04:58,867 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s42iff.c [2020-07-17 18:04:58,949 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2478ffbe2/0041ffaf18f84691a15373ff4b4edf0e/FLAG2c868d74b [2020-07-17 18:04:59,383 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:04:59,383 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s42iff.c [2020-07-17 18:04:59,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2478ffbe2/0041ffaf18f84691a15373ff4b4edf0e/FLAG2c868d74b [2020-07-17 18:04:59,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2478ffbe2/0041ffaf18f84691a15373ff4b4edf0e [2020-07-17 18:04:59,778 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:04:59,781 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:04:59,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:04:59,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:04:59,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:04:59,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:04:59" (1/1) ... [2020-07-17 18:04:59,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62444b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:59, skipping insertion in model container [2020-07-17 18:04:59,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:04:59" (1/1) ... [2020-07-17 18:04:59,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:04:59,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:05:00,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:05:00,026 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:05:00,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:05:00,064 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:05:00,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:00 WrapperNode [2020-07-17 18:05:00,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:05:00,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:05:00,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:05:00,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:05:00,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:00" (1/1) ... [2020-07-17 18:05:00,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:00" (1/1) ... [2020-07-17 18:05:00,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:00" (1/1) ... [2020-07-17 18:05:00,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:00" (1/1) ... [2020-07-17 18:05:00,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:00" (1/1) ... [2020-07-17 18:05:00,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:00" (1/1) ... [2020-07-17 18:05:00,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:00" (1/1) ... [2020-07-17 18:05:00,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:05:00,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:05:00,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:05:00,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:05:00,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:00" (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 [2020-07-17 18:05:00,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:05:00,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:05:00,274 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 18:05:00,274 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 18:05:00,274 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:05:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:05:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 18:05:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 18:05:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 18:05:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 18:05:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 18:05:00,276 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:05:00,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 18:05:00,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 18:05:00,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 18:05:00,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 18:05:00,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 18:05:00,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:05:00,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:05:00,712 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:05:00,712 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-17 18:05:00,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:05:00 BoogieIcfgContainer [2020-07-17 18:05:00,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:05:00,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:05:00,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:05:00,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:05:00,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:04:59" (1/3) ... [2020-07-17 18:05:00,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a1a7d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:05:00, skipping insertion in model container [2020-07-17 18:05:00,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:00" (2/3) ... [2020-07-17 18:05:00,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a1a7d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:05:00, skipping insertion in model container [2020-07-17 18:05:00,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:05:00" (3/3) ... [2020-07-17 18:05:00,725 INFO L109 eAbstractionObserver]: Analyzing ICFG s42iff.c [2020-07-17 18:05:00,736 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:05:00,744 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:05:00,757 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:05:00,776 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:05:00,777 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:05:00,777 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:05:00,777 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:05:00,777 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:05:00,778 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:05:00,778 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:05:00,778 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:05:00,793 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2020-07-17 18:05:00,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 18:05:00,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:05:00,804 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 18:05:00,805 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:05:00,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:05:00,810 INFO L82 PathProgramCache]: Analyzing trace with hash 350973390, now seen corresponding path program 1 times [2020-07-17 18:05:00,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:05:00,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551638621] [2020-07-17 18:05:00,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:05:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:01,038 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 18:05:01,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551638621] [2020-07-17 18:05:01,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:05:01,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 18:05:01,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73330860] [2020-07-17 18:05:01,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 18:05:01,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:05:01,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 18:05:01,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 18:05:01,069 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 3 states. [2020-07-17 18:05:01,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:05:01,289 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2020-07-17 18:05:01,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 18:05:01,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-07-17 18:05:01,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:05:01,302 INFO L225 Difference]: With dead ends: 143 [2020-07-17 18:05:01,302 INFO L226 Difference]: Without dead ends: 68 [2020-07-17 18:05:01,307 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 18:05:01,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-17 18:05:01,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-07-17 18:05:01,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-17 18:05:01,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-07-17 18:05:01,361 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 33 [2020-07-17 18:05:01,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:05:01,361 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-07-17 18:05:01,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 18:05:01,362 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-07-17 18:05:01,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 18:05:01,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:05:01,363 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 18:05:01,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:05:01,364 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:05:01,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:05:01,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1688115303, now seen corresponding path program 1 times [2020-07-17 18:05:01,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:05:01,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835024163] [2020-07-17 18:05:01,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:05:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:01,469 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 18:05:01,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835024163] [2020-07-17 18:05:01,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:05:01,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 18:05:01,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137571616] [2020-07-17 18:05:01,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 18:05:01,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:05:01,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 18:05:01,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 18:05:01,474 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 5 states. [2020-07-17 18:05:01,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:05:01,739 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2020-07-17 18:05:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 18:05:01,740 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-17 18:05:01,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:05:01,742 INFO L225 Difference]: With dead ends: 142 [2020-07-17 18:05:01,742 INFO L226 Difference]: Without dead ends: 102 [2020-07-17 18:05:01,743 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 18:05:01,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-17 18:05:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-07-17 18:05:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-17 18:05:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-07-17 18:05:01,760 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 33 [2020-07-17 18:05:01,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:05:01,761 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-07-17 18:05:01,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 18:05:01,761 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-07-17 18:05:01,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-17 18:05:01,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:05:01,763 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, 1, 1, 1] [2020-07-17 18:05:01,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 18:05:01,764 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:05:01,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:05:01,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1790069826, now seen corresponding path program 1 times [2020-07-17 18:05:01,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:05:01,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203187060] [2020-07-17 18:05:01,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:05:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:05:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:05:01,970 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 18:05:01,971 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 18:05:01,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 18:05:02,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 06:05:02 BoogieIcfgContainer [2020-07-17 18:05:02,024 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 18:05:02,027 INFO L168 Benchmark]: Toolchain (without parser) took 2247.11 ms. Allocated memory was 138.4 MB in the beginning and 235.9 MB in the end (delta: 97.5 MB). Free memory was 101.8 MB in the beginning and 188.8 MB in the end (delta: -87.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-17 18:05:02,028 INFO L168 Benchmark]: CDTParser took 0.90 ms. Allocated memory is still 138.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-17 18:05:02,029 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.86 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 90.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-17 18:05:02,030 INFO L168 Benchmark]: Boogie Preprocessor took 141.71 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 90.7 MB in the beginning and 180.8 MB in the end (delta: -90.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-17 18:05:02,031 INFO L168 Benchmark]: RCFGBuilder took 509.75 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 159.1 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2020-07-17 18:05:02,032 INFO L168 Benchmark]: TraceAbstraction took 1306.49 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 159.1 MB in the beginning and 188.8 MB in the end (delta: -29.8 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-17 18:05:02,037 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.90 ms. Allocated memory is still 138.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 282.86 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 90.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.71 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 90.7 MB in the beginning and 180.8 MB in the end (delta: -90.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 509.75 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 159.1 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1306.49 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 159.1 MB in the beginning and 188.8 MB in the end (delta: -29.8 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; 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={2:0}] [L27] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L29] sum[0] = 1 VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L30] COND TRUE i