/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 0.2.1-dev-36cd7be [2021-02-24 00:16:57,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:16:57,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:16:57,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:16:57,213 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:16:57,239 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:16:57,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:16:57,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:16:57,244 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:16:57,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:16:57,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:16:57,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:16:57,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:16:57,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:16:57,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:16:57,247 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:16:57,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:16:57,248 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:16:57,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:16:57,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:16:57,248 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:16:57,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:16:57,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:16:57,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:16:57,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:16:57,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:16:57,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:16:57,251 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:16:57,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:16:57,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:16:57,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:16:57,716 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:16:57,717 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:16:57,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-1.c [2021-02-24 00:16:57,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/529e5641f/4e8c7bc775cd473fa3fff3897c847e84/FLAG241a30b7d [2021-02-24 00:16:58,380 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:16:58,381 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-1.c [2021-02-24 00:16:58,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/529e5641f/4e8c7bc775cd473fa3fff3897c847e84/FLAG241a30b7d [2021-02-24 00:16:58,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/529e5641f/4e8c7bc775cd473fa3fff3897c847e84 [2021-02-24 00:16:58,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:16:58,744 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:16:58,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:58,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:16:58,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:16:58,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:58" (1/1) ... [2021-02-24 00:16:58,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65b2e44d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:58, skipping insertion in model container [2021-02-24 00:16:58,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:58" (1/1) ... [2021-02-24 00:16:58,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:16:58,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:16:58,925 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-1.c[363,376] [2021-02-24 00:16:58,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:58,956 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:16:58,970 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-1.c[363,376] [2021-02-24 00:16:58,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:58,999 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:16:59,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:58 WrapperNode [2021-02-24 00:16:59,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:59,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:16:59,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:16:59,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:16:59,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:58" (1/1) ... [2021-02-24 00:16:59,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:58" (1/1) ... [2021-02-24 00:16:59,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:58" (1/1) ... [2021-02-24 00:16:59,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:58" (1/1) ... [2021-02-24 00:16:59,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:58" (1/1) ... [2021-02-24 00:16:59,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:58" (1/1) ... [2021-02-24 00:16:59,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:58" (1/1) ... [2021-02-24 00:16:59,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:16:59,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:16:59,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:16:59,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:16:59,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:58" (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 [2021-02-24 00:16:59,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:16:59,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:16:59,152 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:16:59,152 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:16:59,152 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:16:59,152 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:16:59,153 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:16:59,153 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:16:59,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:16:59,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:16:59,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:16:59,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-24 00:16:59,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:16:59,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:16:59,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:16:59,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:16:59,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:16:59,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:16:59,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:16:59,553 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:16:59,554 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-24 00:16:59,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:59 BoogieIcfgContainer [2021-02-24 00:16:59,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:16:59,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:16:59,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:16:59,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:16:59,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:16:58" (1/3) ... [2021-02-24 00:16:59,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152514ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:59, skipping insertion in model container [2021-02-24 00:16:59,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:58" (2/3) ... [2021-02-24 00:16:59,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152514ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:59, skipping insertion in model container [2021-02-24 00:16:59,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:59" (3/3) ... [2021-02-24 00:16:59,569 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_array-1.c [2021-02-24 00:16:59,579 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:16:59,586 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:16:59,614 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:16:59,647 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:16:59,647 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:16:59,647 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:16:59,648 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:16:59,648 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:16:59,648 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:16:59,648 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:16:59,648 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:16:59,671 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2021-02-24 00:16:59,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-24 00:16:59,683 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:59,684 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] [2021-02-24 00:16:59,684 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:59,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:59,692 INFO L82 PathProgramCache]: Analyzing trace with hash 748821666, now seen corresponding path program 1 times [2021-02-24 00:16:59,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:59,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942660143] [2021-02-24 00:16:59,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:00,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,076 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:00,077 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:00,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:00,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:00,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942660143] [2021-02-24 00:17:00,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:00,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:17:00,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784631707] [2021-02-24 00:17:00,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:17:00,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:00,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:17:00,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:17:00,256 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2021-02-24 00:17:00,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:00,530 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2021-02-24 00:17:00,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:17:00,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2021-02-24 00:17:00,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:00,541 INFO L225 Difference]: With dead ends: 119 [2021-02-24 00:17:00,542 INFO L226 Difference]: Without dead ends: 62 [2021-02-24 00:17:00,545 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 [2021-02-24 00:17:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-24 00:17:00,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-02-24 00:17:00,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-24 00:17:00,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-02-24 00:17:00,627 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 33 [2021-02-24 00:17:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:00,631 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-02-24 00:17:00,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:17:00,631 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2021-02-24 00:17:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-24 00:17:00,635 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:00,635 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] [2021-02-24 00:17:00,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:17:00,636 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:00,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:00,640 INFO L82 PathProgramCache]: Analyzing trace with hash 274707514, now seen corresponding path program 1 times [2021-02-24 00:17:00,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:00,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062947438] [2021-02-24 00:17:00,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:00,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:00,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:17:00,832 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:17:00,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-24 00:17:00,875 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-24 00:17:00,875 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-24 00:17:00,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:00,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:00,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:00,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:00,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062947438] [2021-02-24 00:17:00,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:00,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 00:17:00,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908485085] [2021-02-24 00:17:00,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 00:17:00,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:00,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 00:17:00,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:17:00,926 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 6 states. [2021-02-24 00:17:01,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:01,197 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2021-02-24 00:17:01,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-24 00:17:01,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2021-02-24 00:17:01,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:01,201 INFO L225 Difference]: With dead ends: 133 [2021-02-24 00:17:01,202 INFO L226 Difference]: Without dead ends: 92 [2021-02-24 00:17:01,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:17:01,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-24 00:17:01,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2021-02-24 00:17:01,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-02-24 00:17:01,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-02-24 00:17:01,221 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 33 [2021-02-24 00:17:01,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:01,222 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-02-24 00:17:01,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 00:17:01,222 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-02-24 00:17:01,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-24 00:17:01,224 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:01,224 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] [2021-02-24 00:17:01,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:17:01,225 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:01,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:01,229 INFO L82 PathProgramCache]: Analyzing trace with hash 427652598, now seen corresponding path program 1 times [2021-02-24 00:17:01,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:01,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59366781] [2021-02-24 00:17:01,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:17:01,343 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:17:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:17:01,437 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:17:01,474 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 00:17:01,474 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:17:01,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:17:01,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:17:01 BoogieIcfgContainer [2021-02-24 00:17:01,545 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:17:01,547 INFO L168 Benchmark]: Toolchain (without parser) took 2813.47 ms. Allocated memory is still 152.0 MB. Free memory was 128.0 MB in the beginning and 68.2 MB in the end (delta: 59.8 MB). Peak memory consumption was 60.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:01,548 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 152.0 MB. Free memory is still 133.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:17:01,549 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.99 ms. Allocated memory is still 152.0 MB. Free memory was 126.9 MB in the beginning and 116.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:01,550 INFO L168 Benchmark]: Boogie Preprocessor took 41.73 ms. Allocated memory is still 152.0 MB. Free memory was 116.8 MB in the beginning and 115.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:01,551 INFO L168 Benchmark]: RCFGBuilder took 513.71 ms. Allocated memory is still 152.0 MB. Free memory was 115.2 MB in the beginning and 94.2 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:01,552 INFO L168 Benchmark]: TraceAbstraction took 1986.21 ms. Allocated memory is still 152.0 MB. Free memory was 93.8 MB in the beginning and 68.2 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:01,556 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 152.0 MB. Free memory is still 133.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.99 ms. Allocated memory is still 152.0 MB. Free memory was 126.9 MB in the beginning and 116.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.73 ms. Allocated memory is still 152.0 MB. Free memory was 116.8 MB in the beginning and 115.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 513.71 ms. Allocated memory is still 152.0 MB. Free memory was 115.2 MB in the beginning and 94.2 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1986.21 ms. Allocated memory is still 152.0 MB. Free memory was 93.8 MB in the beginning and 68.2 MB in the end (delta: 25.6 MB). Peak memory consumption was 25.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_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