java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 17:03:42,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 17:03:42,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 17:03:42,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-16 17:03:42,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-16 17:03:42,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-16 17:03:42,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-16 17:03:42,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-16 17:03:42,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-16 17:03:42,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-16 17:03:42,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-16 17:03:42,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-16 17:03:42,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 17:03:42,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 17:03:42,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 17:03:42,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 17:03:42,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 17:03:42,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 17:03:42,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 17:03:42,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 17:03:42,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 17:03:42,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 17:03:42,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 17:03:42,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 17:03:42,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 17:03:42,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-16 17:03:42,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-16 17:03:42,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-16 17:03:42,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-16 17:03:42,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-16 17:03:42,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-16 17:03:42,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-16 17:03:42,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-16 17:03:42,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 17:03:42,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 17:03:42,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 17:03:42,347 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-16 17:03:42,362 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 17:03:42,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 17:03:42,362 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-16 17:03:42,363 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-16 17:03:42,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-16 17:03:42,364 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-16 17:03:42,364 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-16 17:03:42,364 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-16 17:03:42,364 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-16 17:03:42,364 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-16 17:03:42,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 17:03:42,365 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 17:03:42,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 17:03:42,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 17:03:42,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 17:03:42,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 17:03:42,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 17:03:42,366 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 17:03:42,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 17:03:42,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 17:03:42,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 17:03:42,367 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-16 17:03:42,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 17:03:42,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 17:03:42,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 17:03:42,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 17:03:42,368 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-16 17:03:42,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 17:03:42,369 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 17:03:42,369 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-16 17:03:42,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 17:03:42,421 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 17:03:42,425 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 17:03:42,426 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 17:03:42,427 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 17:03:42,429 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2019-09-16 17:03:42,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f77e2861/67c261cebf4a4917a6dcbc0b1d4e1fac/FLAGb5c531ed4 [2019-09-16 17:03:43,016 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 17:03:43,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2019-09-16 17:03:43,028 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f77e2861/67c261cebf4a4917a6dcbc0b1d4e1fac/FLAGb5c531ed4 [2019-09-16 17:03:43,389 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f77e2861/67c261cebf4a4917a6dcbc0b1d4e1fac [2019-09-16 17:03:43,403 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 17:03:43,405 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 17:03:43,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 17:03:43,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 17:03:43,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 17:03:43,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:03:43" (1/1) ... [2019-09-16 17:03:43,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4293d688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:43, skipping insertion in model container [2019-09-16 17:03:43,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:03:43" (1/1) ... [2019-09-16 17:03:43,423 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 17:03:43,465 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 17:03:43,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:03:43,897 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 17:03:43,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:03:44,012 INFO L192 MainTranslator]: Completed translation [2019-09-16 17:03:44,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:44 WrapperNode [2019-09-16 17:03:44,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 17:03:44,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 17:03:44,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 17:03:44,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 17:03:44,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:44" (1/1) ... [2019-09-16 17:03:44,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:44" (1/1) ... [2019-09-16 17:03:44,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:44" (1/1) ... [2019-09-16 17:03:44,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:44" (1/1) ... [2019-09-16 17:03:44,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:44" (1/1) ... [2019-09-16 17:03:44,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:44" (1/1) ... [2019-09-16 17:03:44,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:44" (1/1) ... [2019-09-16 17:03:44,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 17:03:44,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 17:03:44,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 17:03:44,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 17:03:44,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:44" (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 [2019-09-16 17:03:44,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 17:03:44,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 17:03:44,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 17:03:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 17:03:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2019-09-16 17:03:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2019-09-16 17:03:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 17:03:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 17:03:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-16 17:03:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-16 17:03:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-16 17:03:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-16 17:03:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-16 17:03:44,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 17:03:44,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 17:03:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-16 17:03:44,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-16 17:03:44,975 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 17:03:44,976 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-16 17:03:44,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:03:44 BoogieIcfgContainer [2019-09-16 17:03:44,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 17:03:44,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 17:03:44,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 17:03:44,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 17:03:44,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 05:03:43" (1/3) ... [2019-09-16 17:03:44,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305a3a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:03:44, skipping insertion in model container [2019-09-16 17:03:44,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:44" (2/3) ... [2019-09-16 17:03:44,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305a3a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:03:44, skipping insertion in model container [2019-09-16 17:03:44,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:03:44" (3/3) ... [2019-09-16 17:03:44,988 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c [2019-09-16 17:03:44,999 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 17:03:45,007 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 17:03:45,025 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 17:03:45,058 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 17:03:45,058 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-16 17:03:45,059 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 17:03:45,059 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 17:03:45,059 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 17:03:45,060 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 17:03:45,060 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 17:03:45,060 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 17:03:45,072 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-16 17:03:45,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-16 17:03:45,081 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:45,082 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:45,085 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:45,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:45,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1960518123, now seen corresponding path program 1 times [2019-09-16 17:03:45,092 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:45,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:45,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:45,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:45,148 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:45,504 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:03:45,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-16 17:03:45,504 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:45,509 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-16 17:03:45,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-16 17:03:45,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-16 17:03:45,525 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2019-09-16 17:03:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:45,610 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2019-09-16 17:03:45,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-16 17:03:45,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-09-16 17:03:45,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:45,624 INFO L225 Difference]: With dead ends: 31 [2019-09-16 17:03:45,624 INFO L226 Difference]: Without dead ends: 21 [2019-09-16 17:03:45,630 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-16 17:03:45,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-16 17:03:45,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-09-16 17:03:45,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-16 17:03:45,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-09-16 17:03:45,665 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2019-09-16 17:03:45,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:45,665 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-09-16 17:03:45,665 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-16 17:03:45,666 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-09-16 17:03:45,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-16 17:03:45,666 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:45,667 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:45,667 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:45,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:45,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1182240945, now seen corresponding path program 1 times [2019-09-16 17:03:45,668 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:45,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:45,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:45,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:45,671 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:45,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:45,863 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:45,864 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2019-09-16 17:03:45,866 INFO L207 CegarAbsIntRunner]: [0], [4], [6], [9], [12], [16], [19], [22], [25], [26], [31], [32], [36], [37], [38] [2019-09-16 17:03:45,912 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-16 17:03:45,912 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-16 17:03:45,982 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-16 17:03:45,984 INFO L272 AbstractInterpreter]: Visited 2 different actions 2 times. Never merged. Never widened. Performed 21 root evaluator evaluations with a maximum evaluation depth of 0. Performed 21 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 32 variables. [2019-09-16 17:03:45,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:45,988 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-16 17:03:46,020 INFO L219 lantSequenceWeakener]: Could never weaken! [2019-09-16 17:03:46,020 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-16 17:03:46,022 INFO L420 sIntCurrentIteration]: We unified 16 AI predicates to 16 [2019-09-16 17:03:46,022 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-16 17:03:46,023 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-16 17:03:46,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2019-09-16 17:03:46,023 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:46,025 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 17:03:46,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 17:03:46,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 17:03:46,026 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 2 states. [2019-09-16 17:03:46,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:46,026 INFO L93 Difference]: Finished difference Result 2 states and 1 transitions. [2019-09-16 17:03:46,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 17:03:46,027 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-09-16 17:03:46,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:46,027 INFO L225 Difference]: With dead ends: 2 [2019-09-16 17:03:46,027 INFO L226 Difference]: Without dead ends: 0 [2019-09-16 17:03:46,028 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 17:03:46,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-16 17:03:46,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-16 17:03:46,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-16 17:03:46,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-16 17:03:46,029 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2019-09-16 17:03:46,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:46,029 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-16 17:03:46,030 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 17:03:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-16 17:03:46,030 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-16 17:03:46,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 05:03:46 BoogieIcfgContainer [2019-09-16 17:03:46,035 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-16 17:03:46,038 INFO L168 Benchmark]: Toolchain (without parser) took 2632.08 ms. Allocated memory was 134.7 MB in the beginning and 229.6 MB in the end (delta: 94.9 MB). Free memory was 89.7 MB in the beginning and 153.3 MB in the end (delta: -63.7 MB). Peak memory consumption was 31.2 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:46,039 INFO L168 Benchmark]: CDTParser took 1.12 ms. Allocated memory is still 134.7 MB. Free memory was 108.5 MB in the beginning and 108.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-16 17:03:46,040 INFO L168 Benchmark]: CACSL2BoogieTranslator took 606.99 ms. Allocated memory was 134.7 MB in the beginning and 202.4 MB in the end (delta: 67.6 MB). Free memory was 89.5 MB in the beginning and 172.4 MB in the end (delta: -82.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:46,041 INFO L168 Benchmark]: Boogie Preprocessor took 92.98 ms. Allocated memory is still 202.4 MB. Free memory was 172.4 MB in the beginning and 168.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:46,042 INFO L168 Benchmark]: RCFGBuilder took 866.37 ms. Allocated memory is still 202.4 MB. Free memory was 168.2 MB in the beginning and 96.2 MB in the end (delta: 72.0 MB). Peak memory consumption was 72.0 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:46,043 INFO L168 Benchmark]: TraceAbstraction took 1056.72 ms. Allocated memory was 202.4 MB in the beginning and 229.6 MB in the end (delta: 27.3 MB). Free memory was 95.6 MB in the beginning and 153.3 MB in the end (delta: -57.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-16 17:03:46,047 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.12 ms. Allocated memory is still 134.7 MB. Free memory was 108.5 MB in the beginning and 108.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 606.99 ms. Allocated memory was 134.7 MB in the beginning and 202.4 MB in the end (delta: 67.6 MB). Free memory was 89.5 MB in the beginning and 172.4 MB in the end (delta: -82.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 92.98 ms. Allocated memory is still 202.4 MB. Free memory was 172.4 MB in the beginning and 168.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 866.37 ms. Allocated memory is still 202.4 MB. Free memory was 168.2 MB in the beginning and 96.2 MB in the end (delta: 72.0 MB). Peak memory consumption was 72.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1056.72 ms. Allocated memory was 202.4 MB in the beginning and 229.6 MB in the end (delta: 27.3 MB). Free memory was 95.6 MB in the beginning and 153.3 MB in the end (delta: -57.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 219]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. SAFE Result, 0.9s OverallTime, 2 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 20 SDtfs, 19 SDslu, 30 SDs, 0 SdLazy, 12 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 1.0 AbsIntWeakeningRatio, 11.625 AbsIntAvgWeakeningVarsNumRemoved, 0.0 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 29 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 1019 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...