/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-fpi/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:43:21,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:43:21,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:43:21,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:43:21,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:43:21,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:43:21,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:43:21,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:43:21,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:43:21,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:43:21,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:43:21,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:43:21,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:43:21,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:43:21,346 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:43:21,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:43:21,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:43:21,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:43:21,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:43:21,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:43:21,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:43:21,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:43:21,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:43:21,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:43:21,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 17:43:21,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:43:21,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:43:21,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:43:21,374 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 17:43:21,385 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:43:21,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:43:21,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:43:21,387 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:43:21,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:43:21,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:43:21,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:43:21,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:43:21,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:43:21,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:43:21,389 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:43:21,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:43:21,389 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:43:21,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:43:21,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:43:21,390 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:43:21,390 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:43:21,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:43:21,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:43:21,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:43:21,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:43:21,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:43:21,391 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:43:21,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:43:21,855 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:43:21,859 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:43:21,861 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:43:21,861 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:43:21,863 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-09-04 17:43:21,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cf63faf9/e9bdb3fea5524e84b5be9ca192cd1c97/FLAGe498ee920 [2020-09-04 17:43:22,543 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:43:22,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs3f.c [2020-09-04 17:43:22,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cf63faf9/e9bdb3fea5524e84b5be9ca192cd1c97/FLAGe498ee920 [2020-09-04 17:43:22,874 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cf63faf9/e9bdb3fea5524e84b5be9ca192cd1c97 [2020-09-04 17:43:22,892 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:43:22,894 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:43:22,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:43:22,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:43:22,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:43:22,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:43:22" (1/1) ... [2020-09-04 17:43:22,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5781f29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:22, skipping insertion in model container [2020-09-04 17:43:22,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:43:22" (1/1) ... [2020-09-04 17:43:22,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:43:22,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:43:23,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:43:23,190 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:43:23,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:43:23,231 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:43:23,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23 WrapperNode [2020-09-04 17:43:23,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:43:23,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:43:23,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:43:23,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:43:23,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (1/1) ... [2020-09-04 17:43:23,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (1/1) ... [2020-09-04 17:43:23,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (1/1) ... [2020-09-04 17:43:23,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (1/1) ... [2020-09-04 17:43:23,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (1/1) ... [2020-09-04 17:43:23,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (1/1) ... [2020-09-04 17:43:23,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (1/1) ... [2020-09-04 17:43:23,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:43:23,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:43:23,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:43:23,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:43:23,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (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 17:43:23,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:43:23,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:43:23,445 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 17:43:23,445 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:43:23,445 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:43:23,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:43:23,445 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 17:43:23,446 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 17:43:23,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:43:23,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 17:43:23,446 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 17:43:23,446 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:43:23,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 17:43:23,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 17:43:23,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 17:43:23,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 17:43:23,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 17:43:23,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:43:23,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:43:23,759 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:43:23,760 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-04 17:43:23,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:43:23 BoogieIcfgContainer [2020-09-04 17:43:23,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:43:23,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:43:23,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:43:23,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:43:23,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:43:22" (1/3) ... [2020-09-04 17:43:23,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61cb14f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:43:23, skipping insertion in model container [2020-09-04 17:43:23,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (2/3) ... [2020-09-04 17:43:23,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61cb14f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:43:23, skipping insertion in model container [2020-09-04 17:43:23,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:43:23" (3/3) ... [2020-09-04 17:43:23,775 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-09-04 17:43:23,787 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:43:23,798 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:43:23,820 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:43:23,867 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:43:23,867 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:43:23,867 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:43:23,867 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:43:23,868 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:43:23,868 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:43:23,868 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:43:23,868 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:43:23,901 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-09-04 17:43:23,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 17:43:23,915 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:23,916 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] [2020-09-04 17:43:23,916 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:23,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:23,923 INFO L82 PathProgramCache]: Analyzing trace with hash 221259408, now seen corresponding path program 1 times [2020-09-04 17:43:23,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:23,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446312155] [2020-09-04 17:43:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:24,002 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 17:43:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,205 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 17:43:24,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446312155] [2020-09-04 17:43:24,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:24,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 17:43:24,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18478097] [2020-09-04 17:43:24,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 17:43:24,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:24,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 17:43:24,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 17:43:24,238 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 3 states. [2020-09-04 17:43:24,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:24,416 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2020-09-04 17:43:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 17:43:24,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-09-04 17:43:24,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:24,430 INFO L225 Difference]: With dead ends: 101 [2020-09-04 17:43:24,431 INFO L226 Difference]: Without dead ends: 47 [2020-09-04 17:43:24,436 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 17:43:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-04 17:43:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-09-04 17:43:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 17:43:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-09-04 17:43:24,492 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 30 [2020-09-04 17:43:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:24,493 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-09-04 17:43:24,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 17:43:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-09-04 17:43:24,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 17:43:24,495 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:24,495 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] [2020-09-04 17:43:24,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:43:24,496 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:24,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:24,497 INFO L82 PathProgramCache]: Analyzing trace with hash -151091841, now seen corresponding path program 1 times [2020-09-04 17:43:24,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:24,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930323606] [2020-09-04 17:43:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:24,501 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 17:43:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,644 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 17:43:24,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930323606] [2020-09-04 17:43:24,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:24,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 17:43:24,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56321410] [2020-09-04 17:43:24,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 17:43:24,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:24,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 17:43:24,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:43:24,648 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 5 states. [2020-09-04 17:43:24,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:24,816 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2020-09-04 17:43:24,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 17:43:24,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-09-04 17:43:24,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:24,819 INFO L225 Difference]: With dead ends: 81 [2020-09-04 17:43:24,819 INFO L226 Difference]: Without dead ends: 56 [2020-09-04 17:43:24,821 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 17:43:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-04 17:43:24,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-09-04 17:43:24,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 17:43:24,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-09-04 17:43:24,836 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 30 [2020-09-04 17:43:24,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:24,837 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-09-04 17:43:24,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 17:43:24,837 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-09-04 17:43:24,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-04 17:43:24,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:24,839 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] [2020-09-04 17:43:24,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:43:24,840 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:24,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:24,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1707000309, now seen corresponding path program 1 times [2020-09-04 17:43:24,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:24,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491635020] [2020-09-04 17:43:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:24,870 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:25,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:25,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 17:43:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:25,056 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 17:43:25,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491635020] [2020-09-04 17:43:25,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:25,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 17:43:25,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344155898] [2020-09-04 17:43:25,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 17:43:25,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:25,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 17:43:25,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-04 17:43:25,059 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 8 states. [2020-09-04 17:43:25,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:25,294 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-09-04 17:43:25,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 17:43:25,294 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-09-04 17:43:25,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:25,296 INFO L225 Difference]: With dead ends: 66 [2020-09-04 17:43:25,296 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 17:43:25,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-04 17:43:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 17:43:25,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-09-04 17:43:25,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-04 17:43:25,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-09-04 17:43:25,310 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 42 [2020-09-04 17:43:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:25,310 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-09-04 17:43:25,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 17:43:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-09-04 17:43:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-04 17:43:25,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:25,313 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-09-04 17:43:25,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:43:25,313 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:25,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1747495296, now seen corresponding path program 1 times [2020-09-04 17:43:25,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:25,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011703851] [2020-09-04 17:43:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:25,328 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:25,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:25,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 17:43:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:25,499 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 17:43:25,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011703851] [2020-09-04 17:43:25,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:25,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 17:43:25,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126219180] [2020-09-04 17:43:25,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 17:43:25,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:25,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 17:43:25,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-04 17:43:25,503 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 10 states. [2020-09-04 17:43:25,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:25,797 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-09-04 17:43:25,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 17:43:25,799 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-09-04 17:43:25,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:25,801 INFO L225 Difference]: With dead ends: 94 [2020-09-04 17:43:25,802 INFO L226 Difference]: Without dead ends: 65 [2020-09-04 17:43:25,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-09-04 17:43:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-04 17:43:25,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-09-04 17:43:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 17:43:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-09-04 17:43:25,828 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 52 [2020-09-04 17:43:25,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:25,831 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-09-04 17:43:25,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 17:43:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-09-04 17:43:25,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 17:43:25,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:25,835 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2020-09-04 17:43:25,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:43:25,839 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:25,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:25,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1872706551, now seen corresponding path program 2 times [2020-09-04 17:43:25,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:25,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213975359] [2020-09-04 17:43:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:25,846 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:26,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:26,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 17:43:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:26,058 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 17:43:26,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213975359] [2020-09-04 17:43:26,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:26,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 17:43:26,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225354469] [2020-09-04 17:43:26,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 17:43:26,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:26,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 17:43:26,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:43:26,062 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 6 states. [2020-09-04 17:43:26,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:26,229 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2020-09-04 17:43:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 17:43:26,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-09-04 17:43:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:26,230 INFO L225 Difference]: With dead ends: 94 [2020-09-04 17:43:26,231 INFO L226 Difference]: Without dead ends: 63 [2020-09-04 17:43:26,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 17:43:26,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-04 17:43:26,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-09-04 17:43:26,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-04 17:43:26,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-09-04 17:43:26,243 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 58 [2020-09-04 17:43:26,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:26,243 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-09-04 17:43:26,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 17:43:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-09-04 17:43:26,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 17:43:26,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:26,245 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-09-04 17:43:26,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 17:43:26,245 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:26,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:26,246 INFO L82 PathProgramCache]: Analyzing trace with hash -557611095, now seen corresponding path program 1 times [2020-09-04 17:43:26,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:26,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487952795] [2020-09-04 17:43:26,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:26,250 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 17:43:26,281 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 17:43:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 17:43:26,334 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 17:43:26,379 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 17:43:26,380 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 17:43:26,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 17:43:26,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 05:43:26 BoogieIcfgContainer [2020-09-04 17:43:26,404 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 17:43:26,408 INFO L168 Benchmark]: Toolchain (without parser) took 3512.96 ms. Allocated memory was 138.4 MB in the beginning and 248.5 MB in the end (delta: 110.1 MB). Free memory was 101.5 MB in the beginning and 196.2 MB in the end (delta: -94.7 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. [2020-09-04 17:43:26,409 INFO L168 Benchmark]: CDTParser took 0.24 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: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-04 17:43:26,410 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.08 ms. Allocated memory is still 138.4 MB. Free memory was 101.3 MB in the beginning and 90.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-04 17:43:26,412 INFO L168 Benchmark]: Boogie Preprocessor took 134.24 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 90.9 MB in the beginning and 179.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-09-04 17:43:26,412 INFO L168 Benchmark]: RCFGBuilder took 399.59 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 160.7 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-09-04 17:43:26,413 INFO L168 Benchmark]: TraceAbstraction took 2637.20 ms. Allocated memory was 201.9 MB in the beginning and 248.5 MB in the end (delta: 46.7 MB). Free memory was 160.7 MB in the beginning and 196.2 MB in the end (delta: -35.5 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-09-04 17:43:26,418 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 332.08 ms. Allocated memory is still 138.4 MB. Free memory was 101.3 MB in the beginning and 90.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.24 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 90.9 MB in the beginning and 179.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 399.59 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 160.7 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2637.20 ms. Allocated memory was 201.9 MB in the beginning and 248.5 MB in the end (delta: 46.7 MB). Free memory was 160.7 MB in the beginning and 196.2 MB in the end (delta: -35.5 MB). Peak memory consumption was 11.1 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; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 [L29] COND TRUE i