/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/res2of.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:09:45,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:09:45,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:09:45,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:09:45,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:09:45,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:09:45,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:09:45,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:09:45,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:09:45,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:09:45,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:09:45,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:09:45,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:09:45,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:09:45,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:09:45,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:09:45,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:09:45,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:09:45,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:09:45,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:09:45,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:09:45,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:09:45,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:09:45,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:09:45,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 23:09:45,121 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 23:09:45,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 23:09:45,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 23:09:45,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 23:09:45,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 23:09:45,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 23:09:45,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 23:09:45,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 23:09:45,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 23:09:45,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 23:09:45,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 23:09:45,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 23:09:45,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 23:09:45,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:09:45,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:09:45,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:09:45,143 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:09:45,162 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:09:45,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:09:45,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:09:45,164 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:09:45,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:09:45,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:09:45,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:09:45,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:09:45,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:09:45,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:09:45,167 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:09:45,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:09:45,168 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:09:45,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:09:45,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:09:45,169 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:09:45,169 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:09:45,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:09:45,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:09:45,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:09:45,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:09:45,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:09:45,171 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 [2020-09-04 23:09:45,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:09:45,619 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:09:45,626 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:09:45,628 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:09:45,628 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:09:45,629 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2of.c [2020-09-04 23:09:45,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/629941b77/a40ef36c142449cb8a88264a092e4bfd/FLAGa76c93a5f [2020-09-04 23:09:46,229 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:09:46,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res2of.c [2020-09-04 23:09:46,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/629941b77/a40ef36c142449cb8a88264a092e4bfd/FLAGa76c93a5f [2020-09-04 23:09:46,567 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/629941b77/a40ef36c142449cb8a88264a092e4bfd [2020-09-04 23:09:46,579 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:09:46,581 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:09:46,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:09:46,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:09:46,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:09:46,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:09:46" (1/1) ... [2020-09-04 23:09:46,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790fb128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:46, skipping insertion in model container [2020-09-04 23:09:46,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:09:46" (1/1) ... [2020-09-04 23:09:46,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:09:46,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:09:46,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:09:46,881 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:09:46,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:09:47,017 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:09:47,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:47 WrapperNode [2020-09-04 23:09:47,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:09:47,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:09:47,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:09:47,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:09:47,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:47" (1/1) ... [2020-09-04 23:09:47,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:47" (1/1) ... [2020-09-04 23:09:47,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:47" (1/1) ... [2020-09-04 23:09:47,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:47" (1/1) ... [2020-09-04 23:09:47,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:47" (1/1) ... [2020-09-04 23:09:47,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:47" (1/1) ... [2020-09-04 23:09:47,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:47" (1/1) ... [2020-09-04 23:09:47,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:09:47,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:09:47,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:09:47,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:09:47,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 23:09:47,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:09:47,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:09:47,168 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 23:09:47,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:09:47,169 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:09:47,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:09:47,169 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 23:09:47,170 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 23:09:47,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:09:47,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 23:09:47,171 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 23:09:47,172 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:09:47,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 23:09:47,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 23:09:47,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 23:09:47,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 23:09:47,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 23:09:47,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:09:47,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:09:47,637 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:09:47,638 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-04 23:09:47,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:09:47 BoogieIcfgContainer [2020-09-04 23:09:47,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:09:47,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:09:47,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:09:47,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:09:47,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:09:46" (1/3) ... [2020-09-04 23:09:47,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd41a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:09:47, skipping insertion in model container [2020-09-04 23:09:47,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:47" (2/3) ... [2020-09-04 23:09:47,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd41a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:09:47, skipping insertion in model container [2020-09-04 23:09:47,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:09:47" (3/3) ... [2020-09-04 23:09:47,653 INFO L109 eAbstractionObserver]: Analyzing ICFG res2of.c [2020-09-04 23:09:47,664 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:09:47,674 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:09:47,696 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:09:47,725 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:09:47,725 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:09:47,725 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:09:47,726 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:09:47,726 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:09:47,726 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:09:47,726 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:09:47,726 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:09:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2020-09-04 23:09:47,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-04 23:09:47,757 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:47,758 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] [2020-09-04 23:09:47,759 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:47,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:47,766 INFO L82 PathProgramCache]: Analyzing trace with hash -386797637, now seen corresponding path program 1 times [2020-09-04 23:09:47,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:47,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35403124] [2020-09-04 23:09:47,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:48,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:48,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:09:48,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35403124] [2020-09-04 23:09:48,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:09:48,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 23:09:48,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703202924] [2020-09-04 23:09:48,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 23:09:48,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:48,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 23:09:48,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:09:48,086 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 3 states. [2020-09-04 23:09:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:48,320 INFO L93 Difference]: Finished difference Result 167 states and 194 transitions. [2020-09-04 23:09:48,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 23:09:48,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-09-04 23:09:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:48,334 INFO L225 Difference]: With dead ends: 167 [2020-09-04 23:09:48,334 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 23:09:48,339 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 [2020-09-04 23:09:48,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 23:09:48,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-09-04 23:09:48,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-04 23:09:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-09-04 23:09:48,399 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 43 [2020-09-04 23:09:48,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:48,400 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-09-04 23:09:48,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 23:09:48,400 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-09-04 23:09:48,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-04 23:09:48,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:48,402 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] [2020-09-04 23:09:48,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:09:48,403 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:48,404 INFO L82 PathProgramCache]: Analyzing trace with hash 614001090, now seen corresponding path program 1 times [2020-09-04 23:09:48,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:48,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413068964] [2020-09-04 23:09:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:48,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:48,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:09:48,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413068964] [2020-09-04 23:09:48,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:09:48,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:09:48,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182828246] [2020-09-04 23:09:48,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:09:48,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:48,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:09:48,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:09:48,552 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 5 states. [2020-09-04 23:09:48,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:48,838 INFO L93 Difference]: Finished difference Result 164 states and 179 transitions. [2020-09-04 23:09:48,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:09:48,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-09-04 23:09:48,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:48,841 INFO L225 Difference]: With dead ends: 164 [2020-09-04 23:09:48,842 INFO L226 Difference]: Without dead ends: 116 [2020-09-04 23:09:48,843 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 [2020-09-04 23:09:48,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-04 23:09:48,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 86. [2020-09-04 23:09:48,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-04 23:09:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-09-04 23:09:48,862 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 43 [2020-09-04 23:09:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:48,863 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-09-04 23:09:48,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:09:48,863 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-09-04 23:09:48,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-04 23:09:48,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:48,866 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, 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] [2020-09-04 23:09:48,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:09:48,867 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:48,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:48,867 INFO L82 PathProgramCache]: Analyzing trace with hash -849907375, now seen corresponding path program 1 times [2020-09-04 23:09:48,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:48,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671605820] [2020-09-04 23:09:48,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:09:48,968 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:09:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:09:49,069 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:09:49,112 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 23:09:49,112 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 23:09:49,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:09:49,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:09:49 BoogieIcfgContainer [2020-09-04 23:09:49,213 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:09:49,217 INFO L168 Benchmark]: Toolchain (without parser) took 2634.38 ms. Allocated memory was 138.4 MB in the beginning and 234.4 MB in the end (delta: 95.9 MB). Free memory was 101.3 MB in the beginning and 165.2 MB in the end (delta: -63.9 MB). Peak memory consumption was 32.1 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:49,218 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 23:09:49,219 INFO L168 Benchmark]: CACSL2BoogieTranslator took 436.47 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 101.1 MB in the beginning and 181.2 MB in the end (delta: -80.1 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:49,220 INFO L168 Benchmark]: Boogie Preprocessor took 57.42 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 178.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:49,221 INFO L168 Benchmark]: RCFGBuilder took 567.46 ms. Allocated memory is still 202.4 MB. Free memory was 178.9 MB in the beginning and 154.4 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:49,222 INFO L168 Benchmark]: TraceAbstraction took 1568.02 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 153.8 MB in the beginning and 165.2 MB in the end (delta: -11.4 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:49,226 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 436.47 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 101.1 MB in the beginning and 181.2 MB in the end (delta: -80.1 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 57.42 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 178.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 567.46 ms. Allocated memory is still 202.4 MB. Free memory was 178.9 MB in the beginning and 154.4 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1568.02 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 153.8 MB in the beginning and 165.2 MB in the end (delta: -11.4 MB). Peak memory consumption was 20.6 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={7:0}] [L27] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={7:0}] [L28] int *b = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, b={-2:0}, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={7:0}] [L29] int *c = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, b={-2:0}, c={5:0}, malloc(sizeof(int)*N)={5:0}, malloc(sizeof(int)*N)={-1:0}, malloc(sizeof(int)*N)={-2:0}, N=1, sum={7:0}] [L31] sum[0] = 0 VAL [\old(N)=0, a={-1:0}, b={-2:0}, c={5:0}, malloc(sizeof(int)*N)={5:0}, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={7:0}] [L32] i=0 VAL [\old(N)=0, a={-1:0}, b={-2:0}, c={5:0}, i=0, malloc(sizeof(int)*N)={5:0}, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={7:0}] [L32] COND TRUE i