/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/sum_array-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:35:24,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:35:24,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:35:24,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 06:35:24,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:35:24,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:35:24,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:35:24,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:35:24,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:35:24,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:35:24,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:35:24,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:35:24,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:35:24,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:35:24,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:35:24,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:35:24,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:35:24,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:35:24,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:35:24,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:35:24,402 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:35:24,414 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:35:24,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:35:24,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:35:24,416 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:35:24,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:35:24,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:35:24,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:35:24,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:35:24,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:35:24,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:35:24,417 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:35:24,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:35:24,418 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:35:24,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:35:24,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:35:24,418 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:35:24,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:35:24,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:35:24,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:35:24,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:35:24,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:35:24,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:35:24,420 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:35:24,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:35:24,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:35:24,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:35:24,801 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:35:24,801 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:35:24,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-1.c [2020-11-07 06:35:24,898 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3440777fb/00fc199e25664def9525648a3928b3bf/FLAGad7f5e4b5 [2020-11-07 06:35:25,568 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:35:25,568 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-1.c [2020-11-07 06:35:25,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3440777fb/00fc199e25664def9525648a3928b3bf/FLAGad7f5e4b5 [2020-11-07 06:35:25,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3440777fb/00fc199e25664def9525648a3928b3bf [2020-11-07 06:35:25,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:35:25,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:35:25,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:25,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:35:25,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:35:25,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:25" (1/1) ... [2020-11-07 06:35:25,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a6153b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:25, skipping insertion in model container [2020-11-07 06:35:25,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:35:25" (1/1) ... [2020-11-07 06:35:25,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:35:25,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:35:26,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:26,147 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:35:26,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:35:26,189 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:35:26,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:26 WrapperNode [2020-11-07 06:35:26,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:35:26,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:35:26,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:35:26,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:35:26,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:26" (1/1) ... [2020-11-07 06:35:26,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:26" (1/1) ... [2020-11-07 06:35:26,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:26" (1/1) ... [2020-11-07 06:35:26,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:26" (1/1) ... [2020-11-07 06:35:26,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:26" (1/1) ... [2020-11-07 06:35:26,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:26" (1/1) ... [2020-11-07 06:35:26,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:26" (1/1) ... [2020-11-07 06:35:26,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:35:26,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:35:26,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:35:26,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:35:26,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:35:26,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:35:26,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:35:26,323 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:35:26,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:35:26,324 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:35:26,324 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:35:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:35:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:35:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:35:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:35:26,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:35:26,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 06:35:26,326 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:35:26,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:35:26,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:35:26,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:35:26,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:35:26,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:35:26,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:35:26,914 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:35:26,914 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-07 06:35:26,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:26 BoogieIcfgContainer [2020-11-07 06:35:26,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:35:26,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:35:26,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:35:26,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:35:26,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:35:25" (1/3) ... [2020-11-07 06:35:26,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f803cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:26, skipping insertion in model container [2020-11-07 06:35:26,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:35:26" (2/3) ... [2020-11-07 06:35:26,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f803cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:35:26, skipping insertion in model container [2020-11-07 06:35:26,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:35:26" (3/3) ... [2020-11-07 06:35:26,935 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_array-1.c [2020-11-07 06:35:26,954 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:35:26,958 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:35:26,970 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:35:27,009 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:35:27,009 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:35:27,009 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:35:27,009 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:35:27,010 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:35:27,010 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:35:27,010 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:35:27,010 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:35:27,041 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-07 06:35:27,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 06:35:27,055 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:27,056 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] [2020-11-07 06:35:27,057 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:27,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1982843023, now seen corresponding path program 1 times [2020-11-07 06:35:27,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:27,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375194932] [2020-11-07 06:35:27,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:27,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:27,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375194932] [2020-11-07 06:35:27,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:27,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:35:27,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579297117] [2020-11-07 06:35:27,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:35:27,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:27,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:35:27,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:35:27,522 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-07 06:35:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:27,794 INFO L93 Difference]: Finished difference Result 123 states and 139 transitions. [2020-11-07 06:35:27,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:35:27,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-11-07 06:35:27,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:27,805 INFO L225 Difference]: With dead ends: 123 [2020-11-07 06:35:27,805 INFO L226 Difference]: Without dead ends: 63 [2020-11-07 06:35:27,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:35:27,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-07 06:35:27,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-07 06:35:27,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-07 06:35:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-11-07 06:35:27,861 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 34 [2020-11-07 06:35:27,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:27,862 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-11-07 06:35:27,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:35:27,863 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-11-07 06:35:27,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 06:35:27,864 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:27,865 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] [2020-11-07 06:35:27,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:35:27,865 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:27,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:27,866 INFO L82 PathProgramCache]: Analyzing trace with hash 499487449, now seen corresponding path program 1 times [2020-11-07 06:35:27,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:27,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727420396] [2020-11-07 06:35:27,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:28,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:35:28,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727420396] [2020-11-07 06:35:28,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:35:28,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 06:35:28,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496704335] [2020-11-07 06:35:28,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:35:28,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:28,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:35:28,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:35:28,206 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 6 states. [2020-11-07 06:35:28,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:28,616 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2020-11-07 06:35:28,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 06:35:28,617 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-11-07 06:35:28,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:28,621 INFO L225 Difference]: With dead ends: 135 [2020-11-07 06:35:28,621 INFO L226 Difference]: Without dead ends: 93 [2020-11-07 06:35:28,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:35:28,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-07 06:35:28,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-11-07 06:35:28,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-07 06:35:28,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-11-07 06:35:28,640 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 34 [2020-11-07 06:35:28,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:28,641 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-11-07 06:35:28,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:35:28,641 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-11-07 06:35:28,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-07 06:35:28,643 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:28,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:35:28,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:35:28,643 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:28,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1895477852, now seen corresponding path program 1 times [2020-11-07 06:35:28,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:28,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913442652] [2020-11-07 06:35:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:35:28,809 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:35:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:35:28,924 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:35:28,976 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 06:35:28,977 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 06:35:28,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:35:29,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:35:29 BoogieIcfgContainer [2020-11-07 06:35:29,082 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:35:29,087 INFO L168 Benchmark]: Toolchain (without parser) took 3158.45 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 128.4 MB in the beginning and 113.3 MB in the end (delta: 15.1 MB). Peak memory consumption was 47.7 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:29,088 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:35:29,089 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.49 ms. Allocated memory is still 151.0 MB. Free memory was 127.7 MB in the beginning and 118.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:29,090 INFO L168 Benchmark]: Boogie Preprocessor took 43.73 ms. Allocated memory is still 151.0 MB. Free memory was 118.0 MB in the beginning and 116.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:29,091 INFO L168 Benchmark]: RCFGBuilder took 683.91 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 132.4 MB in the end (delta: -16.2 MB). Peak memory consumption was 21.8 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:29,093 INFO L168 Benchmark]: TraceAbstraction took 2158.33 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 132.4 MB in the beginning and 113.3 MB in the end (delta: 19.1 MB). Peak memory consumption was 51.0 MB. Max. memory is 8.0 GB. [2020-11-07 06:35:29,097 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.49 ms. Allocated memory is still 151.0 MB. Free memory was 127.7 MB in the beginning and 118.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.73 ms. Allocated memory is still 151.0 MB. Free memory was 118.0 MB in the beginning and 116.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 683.91 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 132.4 MB in the end (delta: -16.2 MB). Peak memory consumption was 21.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2158.33 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 132.4 MB in the beginning and 113.3 MB in the end (delta: 19.1 MB). Peak memory consumption was 51.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L16] unsigned int M = __VERIFIER_nondet_uint(); VAL [__VERIFIER_nondet_uint()=4294967297, M=1] [L17] int A[M], B[M], C[M]; VAL [A={18:0}, B={19:0}, C={13:0}, M=1] [L18] unsigned int i; VAL [A={18:0}, B={19:0}, C={13:0}, M=1] [L20] i=0 VAL [A={18:0}, B={19:0}, C={13:0}, i=0, M=1] [L20] COND TRUE i