/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --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/terminator_03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:06:21,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:06:21,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:06:21,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 18:06:21,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 18:06:21,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 18:06:21,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 18:06:21,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 18:06:21,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 18:06:21,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 18:06:21,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 18:06:21,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 18:06:21,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:06:21,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:06:21,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:06:21,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:06:21,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:06:21,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:06:21,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:06:21,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:06:21,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:06:21,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:06:21,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:06:21,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:06:21,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 18:06:21,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 18:06:21,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 18:06:21,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 18:06:21,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 18:06:21,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 18:06:21,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 18:06:21,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 18:06:21,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 18:06:21,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 18:06:21,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 18:06:21,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 18:06:21,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 18:06:21,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 18:06:21,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:06:21,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:06:21,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:06:21,477 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 18:06:21,486 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:06:21,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:06:21,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:06:21,488 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:06:21,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:06:21,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:06:21,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:06:21,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:06:21,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:06:21,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:06:21,490 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:06:21,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:06:21,490 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:06:21,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:06:21,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:06:21,491 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:06:21,491 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:06:21,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:06:21,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:06:21,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:06:21,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:06:21,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:06:21,492 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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 [2020-07-17 18:06:21,785 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:06:21,802 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:06:21,806 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:06:21,808 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:06:21,808 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:06:21,809 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_03-1.c [2020-07-17 18:06:21,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/636cef8db/254a07038c634d3c87d1d75a7ad051d4/FLAGffb9ea9e2 [2020-07-17 18:06:22,286 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:06:22,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_03-1.c [2020-07-17 18:06:22,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/636cef8db/254a07038c634d3c87d1d75a7ad051d4/FLAGffb9ea9e2 [2020-07-17 18:06:22,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/636cef8db/254a07038c634d3c87d1d75a7ad051d4 [2020-07-17 18:06:22,731 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:06:22,734 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:06:22,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:06:22,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:06:22,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:06:22,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:06:22" (1/1) ... [2020-07-17 18:06:22,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2278241c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:22, skipping insertion in model container [2020-07-17 18:06:22,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:06:22" (1/1) ... [2020-07-17 18:06:22,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:06:22,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:06:22,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:06:22,938 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:06:22,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:06:22,969 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:06:22,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:22 WrapperNode [2020-07-17 18:06:22,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:06:22,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:06:22,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:06:22,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:06:22,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:22" (1/1) ... [2020-07-17 18:06:22,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:22" (1/1) ... [2020-07-17 18:06:22,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:22" (1/1) ... [2020-07-17 18:06:22,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:22" (1/1) ... [2020-07-17 18:06:22,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:22" (1/1) ... [2020-07-17 18:06:22,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:22" (1/1) ... [2020-07-17 18:06:23,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:22" (1/1) ... [2020-07-17 18:06:23,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:06:23,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:06:23,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:06:23,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:06:23,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:22" (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 [2020-07-17 18:06:23,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:06:23,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:06:23,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 18:06:23,153 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:06:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:06:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 18:06:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 18:06:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:06:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:06:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:06:23,435 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:06:23,435 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 18:06:23,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:06:23 BoogieIcfgContainer [2020-07-17 18:06:23,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:06:23,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:06:23,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:06:23,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:06:23,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:06:22" (1/3) ... [2020-07-17 18:06:23,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee5f254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:06:23, skipping insertion in model container [2020-07-17 18:06:23,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:06:22" (2/3) ... [2020-07-17 18:06:23,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee5f254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:06:23, skipping insertion in model container [2020-07-17 18:06:23,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:06:23" (3/3) ... [2020-07-17 18:06:23,448 INFO L109 eAbstractionObserver]: Analyzing ICFG terminator_03-1.c [2020-07-17 18:06:23,460 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:06:23,468 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:06:23,486 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:06:23,513 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:06:23,514 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:06:23,514 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:06:23,514 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:06:23,514 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:06:23,514 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:06:23,514 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:06:23,514 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:06:23,530 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-17 18:06:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-17 18:06:23,541 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:23,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:06:23,543 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:23,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:23,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1947240340, now seen corresponding path program 1 times [2020-07-17 18:06:23,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:23,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267840464] [2020-07-17 18:06:23,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:06:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:06:23,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267840464] [2020-07-17 18:06:23,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:06:23,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 18:06:23,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123815219] [2020-07-17 18:06:23,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 18:06:23,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:06:23,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 18:06:23,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 18:06:23,865 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-07-17 18:06:23,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:06:23,947 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-07-17 18:06:23,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 18:06:23,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-17 18:06:23,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:06:23,957 INFO L225 Difference]: With dead ends: 45 [2020-07-17 18:06:23,957 INFO L226 Difference]: Without dead ends: 18 [2020-07-17 18:06:23,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 18:06:23,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-17 18:06:23,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-17 18:06:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-17 18:06:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-07-17 18:06:23,999 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-07-17 18:06:24,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:06:24,000 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-07-17 18:06:24,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 18:06:24,000 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-07-17 18:06:24,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-17 18:06:24,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:06:24,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:06:24,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:06:24,003 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:06:24,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:06:24,003 INFO L82 PathProgramCache]: Analyzing trace with hash -219943500, now seen corresponding path program 1 times [2020-07-17 18:06:24,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:06:24,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856661386] [2020-07-17 18:06:24,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:06:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:06:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:06:24,044 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 18:06:24,044 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 18:06:24,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 18:06:24,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 06:06:24 BoogieIcfgContainer [2020-07-17 18:06:24,068 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 18:06:24,071 INFO L168 Benchmark]: Toolchain (without parser) took 1336.96 ms. Allocated memory was 136.3 MB in the beginning and 199.2 MB in the end (delta: 62.9 MB). Free memory was 101.6 MB in the beginning and 137.7 MB in the end (delta: -36.1 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2020-07-17 18:06:24,073 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 136.3 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-17 18:06:24,074 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.45 ms. Allocated memory is still 136.3 MB. Free memory was 101.2 MB in the beginning and 91.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-17 18:06:24,075 INFO L168 Benchmark]: Boogie Preprocessor took 104.51 ms. Allocated memory was 136.3 MB in the beginning and 199.2 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 179.2 MB in the end (delta: -87.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. [2020-07-17 18:06:24,077 INFO L168 Benchmark]: RCFGBuilder took 363.70 ms. Allocated memory is still 199.2 MB. Free memory was 179.2 MB in the beginning and 166.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-07-17 18:06:24,078 INFO L168 Benchmark]: TraceAbstraction took 627.92 ms. Allocated memory is still 199.2 MB. Free memory was 166.3 MB in the beginning and 137.7 MB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2020-07-17 18:06:24,083 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 136.3 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 234.45 ms. Allocated memory is still 136.3 MB. Free memory was 101.2 MB in the beginning and 91.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.51 ms. Allocated memory was 136.3 MB in the beginning and 199.2 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 179.2 MB in the end (delta: -87.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 363.70 ms. Allocated memory is still 199.2 MB. Free memory was 179.2 MB in the beginning and 166.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 627.92 ms. Allocated memory is still 199.2 MB. Free memory was 166.3 MB in the beginning and 137.7 MB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] int x=__VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=100, x=100] [L14] int y=__VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=1, x=100, y=1] [L16] COND TRUE y>0 VAL [x=100, y=1] [L18] COND FALSE !(x<100) VAL [x=100, y=1] [L23] CALL __VERIFIER_assert(y<=0 || (y<0 && x>=100)) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 8 SDslu, 66 SDs, 0 SdLazy, 14 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 308 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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...