/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-tiling/skippedu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:43:16,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:43:16,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:43:16,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:43:16,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:43:16,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:43:16,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:43:16,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:43:16,165 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:43:16,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:43:16,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:43:16,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:43:16,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:43:16,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:43:16,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:43:16,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:43:16,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:43:16,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:43:16,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:43:16,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:43:16,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:43:16,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:43:16,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:43:16,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:43:16,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 17:43:16,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 17:43:16,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 17:43:16,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 17:43:16,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 17:43:16,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 17:43:16,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 17:43:16,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 17:43:16,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 17:43:16,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 17:43:16,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 17:43:16,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 17:43:16,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 17:43:16,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 17:43:16,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:43:16,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:43:16,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:43:16,224 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 17:43:16,241 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:43:16,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:43:16,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:43:16,244 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:43:16,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:43:16,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:43:16,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:43:16,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:43:16,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:43:16,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:43:16,246 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:43:16,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:43:16,247 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:43:16,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:43:16,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:43:16,248 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:43:16,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:43:16,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:43:16,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:43:16,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:43:16,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:43:16,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:43:16,250 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:43:16,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:43:16,748 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:43:16,761 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:43:16,770 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:43:16,771 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:43:16,772 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/skippedu.c [2020-09-04 17:43:16,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c96917db6/d1a6046be527420099b8e2307ceb0d41/FLAG68a720d9d [2020-09-04 17:43:17,494 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:43:17,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/skippedu.c [2020-09-04 17:43:17,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c96917db6/d1a6046be527420099b8e2307ceb0d41/FLAG68a720d9d [2020-09-04 17:43:17,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c96917db6/d1a6046be527420099b8e2307ceb0d41 [2020-09-04 17:43:17,782 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:43:17,785 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:43:17,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:43:17,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:43:17,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:43:17,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:43:17" (1/1) ... [2020-09-04 17:43:17,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68466d15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:17, skipping insertion in model container [2020-09-04 17:43:17,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:43:17" (1/1) ... [2020-09-04 17:43:17,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:43:17,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:43:18,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:43:18,085 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:43:18,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:43:18,132 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:43:18,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:18 WrapperNode [2020-09-04 17:43:18,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:43:18,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:43:18,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:43:18,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:43:18,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:18" (1/1) ... [2020-09-04 17:43:18,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:18" (1/1) ... [2020-09-04 17:43:18,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:18" (1/1) ... [2020-09-04 17:43:18,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:18" (1/1) ... [2020-09-04 17:43:18,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:18" (1/1) ... [2020-09-04 17:43:18,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:18" (1/1) ... [2020-09-04 17:43:18,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:18" (1/1) ... [2020-09-04 17:43:18,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:43:18,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:43:18,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:43:18,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:43:18,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:18" (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 17:43:18,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:43:18,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:43:18,381 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 17:43:18,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:43:18,382 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:43:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:43:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 17:43:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 17:43:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:43:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 17:43:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 17:43:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:43:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 17:43:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 17:43:18,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 17:43:18,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:43:18,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:43:18,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 17:43:18,799 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:43:18,800 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 17:43:18,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:43:18 BoogieIcfgContainer [2020-09-04 17:43:18,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:43:18,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:43:18,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:43:18,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:43:18,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:43:17" (1/3) ... [2020-09-04 17:43:18,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9d4239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:43:18, skipping insertion in model container [2020-09-04 17:43:18,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:18" (2/3) ... [2020-09-04 17:43:18,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9d4239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:43:18, skipping insertion in model container [2020-09-04 17:43:18,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:43:18" (3/3) ... [2020-09-04 17:43:18,816 INFO L109 eAbstractionObserver]: Analyzing ICFG skippedu.c [2020-09-04 17:43:18,828 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:43:18,838 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:43:18,860 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:43:18,890 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:43:18,890 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:43:18,890 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:43:18,890 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:43:18,890 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:43:18,890 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:43:18,891 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:43:18,891 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:43:18,907 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-09-04 17:43:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 17:43:18,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:18,923 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] [2020-09-04 17:43:18,923 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:18,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:18,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1270765896, now seen corresponding path program 1 times [2020-09-04 17:43:18,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:18,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610736996] [2020-09-04 17:43:18,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:19,014 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:19,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:19,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 17:43:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:19,273 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 17:43:19,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610736996] [2020-09-04 17:43:19,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:19,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 17:43:19,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145090469] [2020-09-04 17:43:19,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 17:43:19,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:19,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 17:43:19,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 17:43:19,320 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 3 states. [2020-09-04 17:43:19,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:19,578 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2020-09-04 17:43:19,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 17:43:19,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-09-04 17:43:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:19,593 INFO L225 Difference]: With dead ends: 108 [2020-09-04 17:43:19,593 INFO L226 Difference]: Without dead ends: 59 [2020-09-04 17:43:19,598 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 17:43:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-04 17:43:19,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-09-04 17:43:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-04 17:43:19,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-09-04 17:43:19,664 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 33 [2020-09-04 17:43:19,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:19,665 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-09-04 17:43:19,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 17:43:19,665 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-09-04 17:43:19,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 17:43:19,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:19,667 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] [2020-09-04 17:43:19,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:43:19,668 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:19,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:19,669 INFO L82 PathProgramCache]: Analyzing trace with hash 50142755, now seen corresponding path program 1 times [2020-09-04 17:43:19,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:19,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405145875] [2020-09-04 17:43:19,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:19,673 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:19,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:19,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 17:43:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:19,832 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 17:43:19,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405145875] [2020-09-04 17:43:19,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:19,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 17:43:19,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367832656] [2020-09-04 17:43:19,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 17:43:19,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:19,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 17:43:19,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:43:19,837 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 5 states. [2020-09-04 17:43:20,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:20,094 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2020-09-04 17:43:20,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 17:43:20,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-09-04 17:43:20,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:20,099 INFO L225 Difference]: With dead ends: 106 [2020-09-04 17:43:20,100 INFO L226 Difference]: Without dead ends: 71 [2020-09-04 17:43:20,102 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 17:43:20,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-04 17:43:20,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2020-09-04 17:43:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 17:43:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-09-04 17:43:20,124 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 33 [2020-09-04 17:43:20,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:20,125 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-09-04 17:43:20,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 17:43:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-09-04 17:43:20,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-04 17:43:20,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:20,127 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] [2020-09-04 17:43:20,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:43:20,128 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:20,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:20,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1001580845, now seen corresponding path program 1 times [2020-09-04 17:43:20,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:20,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879398597] [2020-09-04 17:43:20,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:20,169 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:20,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:20,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-04 17:43:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:20,381 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 17:43:20,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879398597] [2020-09-04 17:43:20,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:20,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 17:43:20,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842998930] [2020-09-04 17:43:20,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 17:43:20,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:20,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 17:43:20,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-04 17:43:20,392 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 7 states. [2020-09-04 17:43:20,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:20,700 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2020-09-04 17:43:20,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 17:43:20,701 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-09-04 17:43:20,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:20,702 INFO L225 Difference]: With dead ends: 110 [2020-09-04 17:43:20,704 INFO L226 Difference]: Without dead ends: 75 [2020-09-04 17:43:20,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-04 17:43:20,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-04 17:43:20,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2020-09-04 17:43:20,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-04 17:43:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-09-04 17:43:20,730 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 40 [2020-09-04 17:43:20,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:20,730 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-09-04 17:43:20,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 17:43:20,731 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-09-04 17:43:20,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-04 17:43:20,734 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:20,735 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:43:20,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:43:20,736 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:20,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:20,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1248131107, now seen corresponding path program 2 times [2020-09-04 17:43:20,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:20,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932338233] [2020-09-04 17:43:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:20,747 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:21,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:21,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 17:43:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:21,049 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 17:43:21,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932338233] [2020-09-04 17:43:21,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:21,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 17:43:21,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765618106] [2020-09-04 17:43:21,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 17:43:21,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 17:43:21,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:43:21,052 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 6 states. [2020-09-04 17:43:21,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:21,252 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2020-09-04 17:43:21,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 17:43:21,253 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-09-04 17:43:21,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:21,255 INFO L225 Difference]: With dead ends: 94 [2020-09-04 17:43:21,255 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 17:43:21,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-04 17:43:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 17:43:21,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-09-04 17:43:21,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-04 17:43:21,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-09-04 17:43:21,273 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 47 [2020-09-04 17:43:21,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:21,274 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-09-04 17:43:21,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 17:43:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-09-04 17:43:21,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-04 17:43:21,276 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:21,276 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:43:21,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:43:21,276 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:21,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:21,277 INFO L82 PathProgramCache]: Analyzing trace with hash -153041457, now seen corresponding path program 1 times [2020-09-04 17:43:21,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:21,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535031015] [2020-09-04 17:43:21,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:21,292 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 17:43:21,327 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 17:43:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 17:43:21,356 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 17:43:21,394 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 17:43:21,394 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 17:43:21,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 17:43:21,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 05:43:21 BoogieIcfgContainer [2020-09-04 17:43:21,422 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 17:43:21,426 INFO L168 Benchmark]: Toolchain (without parser) took 3640.37 ms. Allocated memory was 138.9 MB in the beginning and 235.9 MB in the end (delta: 97.0 MB). Free memory was 102.0 MB in the beginning and 91.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 107.7 MB. Max. memory is 7.1 GB. [2020-09-04 17:43:21,431 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 119.8 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-09-04 17:43:21,431 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.18 ms. Allocated memory is still 138.9 MB. Free memory was 102.0 MB in the beginning and 91.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:43:21,432 INFO L168 Benchmark]: Boogie Preprocessor took 153.13 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 91.5 MB in the beginning and 180.3 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-09-04 17:43:21,441 INFO L168 Benchmark]: RCFGBuilder took 519.09 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 160.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-09-04 17:43:21,443 INFO L168 Benchmark]: TraceAbstraction took 2614.81 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 160.4 MB in the beginning and 91.3 MB in the end (delta: 69.1 MB). Peak memory consumption was 102.1 MB. Max. memory is 7.1 GB. [2020-09-04 17:43:21,453 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 119.8 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 347.18 ms. Allocated memory is still 138.9 MB. Free memory was 102.0 MB in the beginning and 91.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 153.13 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 91.5 MB in the beginning and 180.3 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 519.09 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 160.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2614.81 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 160.4 MB in the beginning and 91.3 MB in the end (delta: 69.1 MB). Peak memory consumption was 102.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int SIZE; [L12] const int MAX = 100000; [L16] SIZE = __VERIFIER_nondet_int() [L17] COND TRUE SIZE > 1 && SIZE < MAX [L19] int i; [L20] int *a = malloc(sizeof(int)*SIZE); [L22] i = 0 [L22] COND TRUE i < SIZE [L24] a[i] = __VERIFIER_nondet_int() [L22] i++ [L22] COND TRUE i < SIZE [L24] a[i] = __VERIFIER_nondet_int() [L22] i++ [L22] COND FALSE !(i < SIZE) [L27] COND FALSE !(SIZE % 2 != 0) [L29] CALL assume_abort_if_not(SIZE % 2 == 0) [L4] COND FALSE !(!cond) [L29] RET assume_abort_if_not(SIZE % 2 == 0) [L30] i = 1 [L30] COND TRUE i <= SIZE/2 [L32] EXPR a[2*i-2] [L32] COND FALSE !(a[2*i-2] > i) [L36] EXPR a[2*i-1] [L36] COND FALSE !(a[2*i-1] > i) [L30] i++ [L30] COND FALSE !(i <= SIZE/2) [L42] i = 0 [L42] COND TRUE i < SIZE [L44] EXPR a[i] [L44] CALL __VERIFIER_assert( a[i] <= i ) [L6] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 66 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.5s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 207 SDtfs, 306 SDslu, 108 SDs, 0 SdLazy, 430 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 31 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...