/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/loop-invgen/id_trans.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:28:30,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:28:30,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:28:30,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:28:30,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:28:30,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:28:30,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:28:30,414 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:28:30,439 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:28:30,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:28:30,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:28:30,445 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:28:30,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:28:30,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:28:30,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:28:30,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:28:30,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:28:30,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:28:30,450 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:28:30,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:28:30,450 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:28:30,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:28:30,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:28:30,451 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:28:30,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:28:30,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:28:30,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:28:30,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:28:30,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:28:30,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:28:30,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:28:30,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:28:31,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:28:31,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:28:31,025 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:28:31,026 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:28:31,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_trans.i [2020-10-24 02:28:31,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9aa49cd6/44168325c74144858cb043b4728a28a9/FLAGdc3a6c8b3 [2020-10-24 02:28:31,719 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:28:31,719 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_trans.i [2020-10-24 02:28:31,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9aa49cd6/44168325c74144858cb043b4728a28a9/FLAGdc3a6c8b3 [2020-10-24 02:28:32,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9aa49cd6/44168325c74144858cb043b4728a28a9 [2020-10-24 02:28:32,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:28:32,097 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:28:32,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:28:32,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:28:32,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:28:32,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:28:32" (1/1) ... [2020-10-24 02:28:32,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f6048d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:32, skipping insertion in model container [2020-10-24 02:28:32,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:28:32" (1/1) ... [2020-10-24 02:28:32,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:28:32,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:28:32,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:28:32,378 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:28:32,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:28:32,417 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:28:32,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:32 WrapperNode [2020-10-24 02:28:32,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:28:32,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:28:32,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:28:32,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:28:32,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:32" (1/1) ... [2020-10-24 02:28:32,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:32" (1/1) ... [2020-10-24 02:28:32,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:32" (1/1) ... [2020-10-24 02:28:32,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:32" (1/1) ... [2020-10-24 02:28:32,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:32" (1/1) ... [2020-10-24 02:28:32,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:32" (1/1) ... [2020-10-24 02:28:32,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:32" (1/1) ... [2020-10-24 02:28:32,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:28:32,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:28:32,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:28:32,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:28:32,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:32" (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 [2020-10-24 02:28:32,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:28:32,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:28:32,549 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:28:32,549 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:28:32,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:28:32,549 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:28:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:28:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:28:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 02:28:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 02:28:32,550 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:28:32,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:28:32,551 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:28:32,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:28:32,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:28:32,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:28:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:28:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:28:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:28:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:28:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:28:32,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:28:32,942 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:28:32,943 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 02:28:32,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:28:32 BoogieIcfgContainer [2020-10-24 02:28:32,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:28:32,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:28:32,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:28:32,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:28:32,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:28:32" (1/3) ... [2020-10-24 02:28:32,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b849e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:28:32, skipping insertion in model container [2020-10-24 02:28:32,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:32" (2/3) ... [2020-10-24 02:28:32,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b849e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:28:32, skipping insertion in model container [2020-10-24 02:28:32,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:28:32" (3/3) ... [2020-10-24 02:28:32,957 INFO L111 eAbstractionObserver]: Analyzing ICFG id_trans.i [2020-10-24 02:28:32,970 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:28:32,987 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:28:33,005 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:28:33,050 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:28:33,051 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:28:33,051 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:28:33,051 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:28:33,051 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:28:33,052 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:28:33,052 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:28:33,053 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:28:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2020-10-24 02:28:33,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-24 02:28:33,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:33,105 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] [2020-10-24 02:28:33,106 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:33,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:33,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1777359278, now seen corresponding path program 1 times [2020-10-24 02:28:33,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:33,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68923828] [2020-10-24 02:28:33,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:33,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:28:33,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68923828] [2020-10-24 02:28:33,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:28:33,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 02:28:33,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259507634] [2020-10-24 02:28:33,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:28:33,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:33,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:28:33,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:28:33,620 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 6 states. [2020-10-24 02:28:34,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:34,187 INFO L93 Difference]: Finished difference Result 88 states and 116 transitions. [2020-10-24 02:28:34,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:28:34,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-10-24 02:28:34,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:34,199 INFO L225 Difference]: With dead ends: 88 [2020-10-24 02:28:34,199 INFO L226 Difference]: Without dead ends: 54 [2020-10-24 02:28:34,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:28:34,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-24 02:28:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-10-24 02:28:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-24 02:28:34,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-24 02:28:34,266 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 34 [2020-10-24 02:28:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:34,267 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-24 02:28:34,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:28:34,267 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-24 02:28:34,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-24 02:28:34,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:34,270 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-24 02:28:34,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:28:34,270 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:34,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:34,271 INFO L82 PathProgramCache]: Analyzing trace with hash 679677020, now seen corresponding path program 1 times [2020-10-24 02:28:34,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:34,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866578945] [2020-10-24 02:28:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:34,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:34,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-24 02:28:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:28:34,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866578945] [2020-10-24 02:28:34,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:28:34,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 02:28:34,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134645128] [2020-10-24 02:28:34,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:28:34,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:34,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:28:34,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:28:34,436 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 6 states. [2020-10-24 02:28:34,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:34,777 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-10-24 02:28:34,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:28:34,779 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-10-24 02:28:34,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:34,783 INFO L225 Difference]: With dead ends: 59 [2020-10-24 02:28:34,784 INFO L226 Difference]: Without dead ends: 55 [2020-10-24 02:28:34,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:28:34,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-24 02:28:34,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-24 02:28:34,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-24 02:28:34,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-24 02:28:34,823 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 39 [2020-10-24 02:28:34,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:34,824 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-24 02:28:34,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:28:34,824 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-24 02:28:34,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-24 02:28:34,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:34,829 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:28:34,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:28:34,829 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:34,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:34,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1480344100, now seen corresponding path program 1 times [2020-10-24 02:28:34,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:34,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379754966] [2020-10-24 02:28:34,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:28:34,895 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:28:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:28:34,926 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:28:34,958 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 02:28:34,959 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 02:28:34,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:28:35,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:28:35 BoogieIcfgContainer [2020-10-24 02:28:35,030 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:28:35,038 INFO L168 Benchmark]: Toolchain (without parser) took 2940.06 ms. Allocated memory is still 158.3 MB. Free memory was 134.8 MB in the beginning and 116.2 MB in the end (delta: 18.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 8.0 GB. [2020-10-24 02:28:35,039 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 125.8 MB. Free memory was 104.1 MB in the beginning and 104.0 MB in the end (delta: 91.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:28:35,042 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.09 ms. Allocated memory is still 158.3 MB. Free memory was 134.2 MB in the beginning and 124.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-24 02:28:35,048 INFO L168 Benchmark]: Boogie Preprocessor took 42.34 ms. Allocated memory is still 158.3 MB. Free memory was 124.0 MB in the beginning and 122.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 02:28:35,051 INFO L168 Benchmark]: RCFGBuilder took 481.72 ms. Allocated memory is still 158.3 MB. Free memory was 122.4 MB in the beginning and 141.5 MB in the end (delta: -19.0 MB). Peak memory consumption was 19.3 MB. Max. memory is 8.0 GB. [2020-10-24 02:28:35,052 INFO L168 Benchmark]: TraceAbstraction took 2082.85 ms. Allocated memory is still 158.3 MB. Free memory was 141.1 MB in the beginning and 116.2 MB in the end (delta: 24.9 MB). Peak memory consumption was 25.5 MB. Max. memory is 8.0 GB. [2020-10-24 02:28:35,060 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 125.8 MB. Free memory was 104.1 MB in the beginning and 104.0 MB in the end (delta: 91.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 320.09 ms. Allocated memory is still 158.3 MB. Free memory was 134.2 MB in the beginning and 124.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.34 ms. Allocated memory is still 158.3 MB. Free memory was 124.0 MB in the beginning and 122.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 481.72 ms. Allocated memory is still 158.3 MB. Free memory was 122.4 MB in the beginning and 141.5 MB in the end (delta: -19.0 MB). Peak memory consumption was 19.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2082.85 ms. Allocated memory is still 158.3 MB. Free memory was 141.1 MB in the beginning and 116.2 MB in the end (delta: 24.9 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: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L25] int idBitLength, material_length, nlen; [L26] int j, k; [L27] nlen = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, nlen=0] [L28] idBitLength = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=9, idBitLength=9, nlen=0] [L29] material_length = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, idBitLength=9, material_length=1, nlen=0] [L30] COND FALSE !(!( nlen == idBitLength / 32 )) VAL [idBitLength=9, material_length=1, nlen=0] [L31] j = 0 VAL [idBitLength=9, j=0, material_length=1, nlen=0] [L31] COND TRUE (j < idBitLength / 8) && (j < material_length) VAL [idBitLength=9, j=0, material_length=1, nlen=0] [L32] CALL __VERIFIER_assert( 0 <= j) VAL [\old(cond)=1] [L18] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L32] RET __VERIFIER_assert( 0 <= j) VAL [idBitLength=9, j=0, material_length=1, nlen=0] [L33] CALL __VERIFIER_assert( j < material_length ) VAL [\old(cond)=1] [L18] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L33] RET __VERIFIER_assert( j < material_length ) VAL [idBitLength=9, j=0, material_length=1, nlen=0] [L34] CALL __VERIFIER_assert( 0 <= j/4 ) VAL [\old(cond)=1] [L18] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L34] RET __VERIFIER_assert( 0 <= j/4 ) VAL [idBitLength=9, j=0, material_length=1, nlen=0] [L35] CALL __VERIFIER_assert( j/4 < nlen) VAL [\old(cond)=0] [L18] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L19] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "assert.h", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 58 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 4, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 88 SDtfs, 80 SDslu, 104 SDs, 0 SdLazy, 238 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 122 NumberOfCodeBlocks, 122 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 71 ConstructedInterpolants, 0 QuantifiedInterpolants, 4947 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...