/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/res1of.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:04:39,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:04:39,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:04:39,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 18:04:39,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 18:04:39,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 18:04:39,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 18:04:39,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 18:04:39,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 18:04:39,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 18:04:39,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 18:04:39,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 18:04:39,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:04:39,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:04:39,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:04:39,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:04:39,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:04:39,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:04:39,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:04:39,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:04:39,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:04:39,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:04:39,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:04:39,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:04:39,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 18:04:39,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 18:04:39,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 18:04:39,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 18:04:39,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 18:04:39,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 18:04:39,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 18:04:39,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 18:04:39,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 18:04:39,247 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 18:04:39,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 18:04:39,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 18:04:39,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 18:04:39,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 18:04:39,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:04:39,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:04:39,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:04:39,258 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 18:04:39,274 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:04:39,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:04:39,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:04:39,277 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:04:39,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:04:39,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:04:39,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:04:39,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:04:39,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:04:39,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:04:39,279 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:04:39,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:04:39,279 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:04:39,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:04:39,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:04:39,280 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:04:39,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:04:39,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:04:39,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:04:39,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:04:39,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:04:39,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:04:39,281 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 18:04:39,585 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:04:39,601 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:04:39,605 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:04:39,607 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:04:39,608 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:04:39,609 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1of.c [2020-07-17 18:04:39,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aab4c48f/df02c5b3cbe74af38451559f7a241253/FLAGf378be4de [2020-07-17 18:04:40,229 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:04:40,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res1of.c [2020-07-17 18:04:40,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aab4c48f/df02c5b3cbe74af38451559f7a241253/FLAGf378be4de [2020-07-17 18:04:40,587 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6aab4c48f/df02c5b3cbe74af38451559f7a241253 [2020-07-17 18:04:40,597 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:04:40,599 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:04:40,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:04:40,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:04:40,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:04:40,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:04:40" (1/1) ... [2020-07-17 18:04:40,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774f1913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:40, skipping insertion in model container [2020-07-17 18:04:40,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:04:40" (1/1) ... [2020-07-17 18:04:40,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:04:40,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:04:40,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:04:40,876 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:04:40,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:04:40,916 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:04:40,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:40 WrapperNode [2020-07-17 18:04:40,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:04:40,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:04:40,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:04:40,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:04:41,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:40" (1/1) ... [2020-07-17 18:04:41,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:40" (1/1) ... [2020-07-17 18:04:41,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:40" (1/1) ... [2020-07-17 18:04:41,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:40" (1/1) ... [2020-07-17 18:04:41,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:40" (1/1) ... [2020-07-17 18:04:41,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:40" (1/1) ... [2020-07-17 18:04:41,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:40" (1/1) ... [2020-07-17 18:04:41,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:04:41,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:04:41,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:04:41,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:04:41,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:40" (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 18:04:41,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:04:41,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:04:41,130 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 18:04:41,130 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 18:04:41,130 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:04:41,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:04:41,130 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 18:04:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 18:04:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 18:04:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 18:04:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 18:04:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:04:41,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 18:04:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 18:04:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 18:04:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 18:04:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 18:04:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:04:41,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:04:41,475 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:04:41,476 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-17 18:04:41,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:04:41 BoogieIcfgContainer [2020-07-17 18:04:41,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:04:41,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:04:41,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:04:41,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:04:41,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:04:40" (1/3) ... [2020-07-17 18:04:41,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b120ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:04:41, skipping insertion in model container [2020-07-17 18:04:41,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:04:40" (2/3) ... [2020-07-17 18:04:41,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b120ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:04:41, skipping insertion in model container [2020-07-17 18:04:41,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:04:41" (3/3) ... [2020-07-17 18:04:41,493 INFO L109 eAbstractionObserver]: Analyzing ICFG res1of.c [2020-07-17 18:04:41,507 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:04:41,516 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:04:41,534 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:04:41,565 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:04:41,566 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:04:41,566 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:04:41,567 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:04:41,568 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:04:41,569 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:04:41,569 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:04:41,569 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:04:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-07-17 18:04:41,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-17 18:04:41,611 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:41,613 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] [2020-07-17 18:04:41,613 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:41,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:41,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1485233439, now seen corresponding path program 1 times [2020-07-17 18:04:41,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:41,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040235739] [2020-07-17 18:04:41,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:41,886 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 18:04:41,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040235739] [2020-07-17 18:04:41,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:04:41,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 18:04:41,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477750323] [2020-07-17 18:04:41,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 18:04:41,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:04:41,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 18:04:41,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 18:04:41,915 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 3 states. [2020-07-17 18:04:42,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:42,151 INFO L93 Difference]: Finished difference Result 131 states and 150 transitions. [2020-07-17 18:04:42,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 18:04:42,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-17 18:04:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:42,167 INFO L225 Difference]: With dead ends: 131 [2020-07-17 18:04:42,167 INFO L226 Difference]: Without dead ends: 62 [2020-07-17 18:04:42,172 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 18:04:42,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-17 18:04:42,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-07-17 18:04:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-17 18:04:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-07-17 18:04:42,229 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 37 [2020-07-17 18:04:42,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:42,229 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-07-17 18:04:42,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 18:04:42,230 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-07-17 18:04:42,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-17 18:04:42,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:42,232 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] [2020-07-17 18:04:42,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:04:42,233 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:42,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810423, now seen corresponding path program 1 times [2020-07-17 18:04:42,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:42,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195844108] [2020-07-17 18:04:42,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:04:42,417 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 18:04:42,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195844108] [2020-07-17 18:04:42,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:04:42,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 18:04:42,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088220805] [2020-07-17 18:04:42,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 18:04:42,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:04:42,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 18:04:42,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 18:04:42,423 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 5 states. [2020-07-17 18:04:42,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:04:42,712 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2020-07-17 18:04:42,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 18:04:42,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-07-17 18:04:42,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:04:42,715 INFO L225 Difference]: With dead ends: 118 [2020-07-17 18:04:42,716 INFO L226 Difference]: Without dead ends: 86 [2020-07-17 18:04:42,717 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 18:04:42,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-17 18:04:42,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2020-07-17 18:04:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-17 18:04:42,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-07-17 18:04:42,734 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 37 [2020-07-17 18:04:42,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:04:42,735 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-07-17 18:04:42,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 18:04:42,735 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-07-17 18:04:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-17 18:04:42,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:04:42,738 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] [2020-07-17 18:04:42,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 18:04:42,739 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:04:42,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:04:42,739 INFO L82 PathProgramCache]: Analyzing trace with hash 499886001, now seen corresponding path program 1 times [2020-07-17 18:04:42,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:04:42,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088306387] [2020-07-17 18:04:42,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:04:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:04:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:04:43,010 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 18:04:43,010 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 18:04:43,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 18:04:43,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 06:04:43 BoogieIcfgContainer [2020-07-17 18:04:43,079 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 18:04:43,082 INFO L168 Benchmark]: Toolchain (without parser) took 2482.64 ms. Allocated memory was 137.9 MB in the beginning and 234.4 MB in the end (delta: 96.5 MB). Free memory was 102.8 MB in the beginning and 188.5 MB in the end (delta: -85.7 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:43,083 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 137.9 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-17 18:04:43,084 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.20 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 91.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:43,085 INFO L168 Benchmark]: Boogie Preprocessor took 133.92 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 179.9 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:43,087 INFO L168 Benchmark]: RCFGBuilder took 432.00 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 158.0 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:43,088 INFO L168 Benchmark]: TraceAbstraction took 1594.25 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 157.3 MB in the beginning and 188.5 MB in the end (delta: -31.2 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-17 18:04:43,093 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 137.9 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 316.20 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 91.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.92 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 179.9 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 432.00 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 158.0 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1594.25 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 157.3 MB in the beginning and 188.5 MB in the end (delta: -31.2 MB). Peak memory consumption was 1.3 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={3:0}] [L27] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={3:0}] [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={3:0}] [L30] sum[0] = 0 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={3:0}] [L31] i=0 VAL [\old(N)=0, a={-1:0}, b={-2:0}, i=0, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={3:0}] [L31] COND TRUE i