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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/array-crafted/zero_sum4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:52:53,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:52:53,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:52:53,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:52:53,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:52:53,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:52:53,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:52:53,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:52:53,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:52:53,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:52:53,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:52:53,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:52:53,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:52:53,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:52:53,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:52:53,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:52:53,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:52:53,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:52:53,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:52:53,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:52:53,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:52:53,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:52:53,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:52:53,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:52:53,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:52:53,228 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:52:53,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:52:53,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:52:53,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:52:53,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:52:53,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:52:53,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:52:53,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:52:53,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:52:53,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:52:53,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:52:53,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:52:53,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:52:53,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:52:53,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:52:53,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:52:53,240 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 19:52:53,274 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:52:53,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:52:53,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:52:53,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:52:53,276 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:52:53,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:52:53,277 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:52:53,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:52:53,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:52:53,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:52:53,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:52:53,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:52:53,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:52:53,278 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:52:53,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:52:53,278 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:52:53,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:52:53,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:52:53,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:52:53,279 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:52:53,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:52:53,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:52:53,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:52:53,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:52:53,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:52:53,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:52:53,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:52:53,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:52:53,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 19:52:53,558 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:52:53,570 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:52:53,573 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:52:53,574 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:52:53,575 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:52:53,575 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum4.c [2019-10-13 19:52:53,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d205cddc/686dbbfa65f84b9286d0d38ad0dc24cc/FLAGc4e366777 [2019-10-13 19:52:54,046 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:52:54,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum4.c [2019-10-13 19:52:54,054 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d205cddc/686dbbfa65f84b9286d0d38ad0dc24cc/FLAGc4e366777 [2019-10-13 19:52:54,469 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d205cddc/686dbbfa65f84b9286d0d38ad0dc24cc [2019-10-13 19:52:54,478 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:52:54,479 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:52:54,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:52:54,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:52:54,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:52:54,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:52:54" (1/1) ... [2019-10-13 19:52:54,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@580da5e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:54, skipping insertion in model container [2019-10-13 19:52:54,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:52:54" (1/1) ... [2019-10-13 19:52:54,495 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:52:54,518 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:52:54,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:52:54,767 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:52:54,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:52:54,841 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:52:54,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:54 WrapperNode [2019-10-13 19:52:54,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:52:54,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:52:54,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:52:54,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:52:54,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:54" (1/1) ... [2019-10-13 19:52:54,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:54" (1/1) ... [2019-10-13 19:52:54,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:54" (1/1) ... [2019-10-13 19:52:54,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:54" (1/1) ... [2019-10-13 19:52:54,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:54" (1/1) ... [2019-10-13 19:52:54,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:54" (1/1) ... [2019-10-13 19:52:54,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:54" (1/1) ... [2019-10-13 19:52:54,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:52:54,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:52:54,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:52:54,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:52:54,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:54" (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 [2019-10-13 19:52:55,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:52:55,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:52:55,022 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:52:55,022 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:52:55,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:52:55,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:52:55,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:52:55,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2019-10-13 19:52:55,023 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:52:55,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:52:55,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:52:55,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:52:55,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:52:55,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:52:55,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:52:55,350 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:52:55,351 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-13 19:52:55,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:52:55 BoogieIcfgContainer [2019-10-13 19:52:55,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:52:55,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:52:55,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:52:55,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:52:55,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:52:54" (1/3) ... [2019-10-13 19:52:55,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6318acd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:52:55, skipping insertion in model container [2019-10-13 19:52:55,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:54" (2/3) ... [2019-10-13 19:52:55,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6318acd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:52:55, skipping insertion in model container [2019-10-13 19:52:55,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:52:55" (3/3) ... [2019-10-13 19:52:55,360 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum4.c [2019-10-13 19:52:55,369 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:52:55,374 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:52:55,385 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:52:55,410 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:52:55,410 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:52:55,410 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:52:55,410 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:52:55,411 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:52:55,411 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:52:55,411 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:52:55,411 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:52:55,429 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2019-10-13 19:52:55,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 19:52:55,435 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:52:55,435 INFO L380 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] [2019-10-13 19:52:55,437 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:52:55,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:52:55,442 INFO L82 PathProgramCache]: Analyzing trace with hash -2099146995, now seen corresponding path program 1 times [2019-10-13 19:52:55,449 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:52:55,449 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372006282] [2019-10-13 19:52:55,449 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:55,449 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:55,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:52:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:52:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:52:55,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372006282] [2019-10-13 19:52:55,598 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:52:55,599 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 19:52:55,599 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991515015] [2019-10-13 19:52:55,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 19:52:55,605 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:52:55,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 19:52:55,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:52:55,622 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 2 states. [2019-10-13 19:52:55,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:52:55,646 INFO L93 Difference]: Finished difference Result 83 states and 119 transitions. [2019-10-13 19:52:55,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 19:52:55,647 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 28 [2019-10-13 19:52:55,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:52:55,653 INFO L225 Difference]: With dead ends: 83 [2019-10-13 19:52:55,654 INFO L226 Difference]: Without dead ends: 38 [2019-10-13 19:52:55,657 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:52:55,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-13 19:52:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-13 19:52:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-13 19:52:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-10-13 19:52:55,693 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2019-10-13 19:52:55,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:52:55,694 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-10-13 19:52:55,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 19:52:55,694 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-10-13 19:52:55,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 19:52:55,696 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:52:55,696 INFO L380 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] [2019-10-13 19:52:55,696 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:52:55,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:52:55,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2130853259, now seen corresponding path program 1 times [2019-10-13 19:52:55,697 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:52:55,697 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964667852] [2019-10-13 19:52:55,698 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:55,698 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:55,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:52:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:52:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:52:55,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964667852] [2019-10-13 19:52:55,841 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:52:55,841 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:52:55,842 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268947580] [2019-10-13 19:52:55,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:52:55,844 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:52:55,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:52:55,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:52:55,845 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 5 states. [2019-10-13 19:52:55,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:52:55,946 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2019-10-13 19:52:55,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:52:55,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-10-13 19:52:55,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:52:55,949 INFO L225 Difference]: With dead ends: 58 [2019-10-13 19:52:55,949 INFO L226 Difference]: Without dead ends: 53 [2019-10-13 19:52:55,951 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:52:55,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-13 19:52:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-13 19:52:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-13 19:52:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2019-10-13 19:52:55,965 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 28 [2019-10-13 19:52:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:52:55,965 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2019-10-13 19:52:55,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:52:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2019-10-13 19:52:55,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 19:52:55,969 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:52:55,970 INFO L380 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] [2019-10-13 19:52:55,970 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:52:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:52:55,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1966572211, now seen corresponding path program 1 times [2019-10-13 19:52:55,971 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:52:55,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598377789] [2019-10-13 19:52:55,972 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:55,972 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:55,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:52:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:52:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:52:56,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598377789] [2019-10-13 19:52:56,066 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:52:56,066 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:52:56,067 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536858475] [2019-10-13 19:52:56,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:52:56,068 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:52:56,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:52:56,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:52:56,069 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand 3 states. [2019-10-13 19:52:56,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:52:56,123 INFO L93 Difference]: Finished difference Result 99 states and 129 transitions. [2019-10-13 19:52:56,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:52:56,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2019-10-13 19:52:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:52:56,125 INFO L225 Difference]: With dead ends: 99 [2019-10-13 19:52:56,125 INFO L226 Difference]: Without dead ends: 55 [2019-10-13 19:52:56,126 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:52:56,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-13 19:52:56,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-10-13 19:52:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-13 19:52:56,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2019-10-13 19:52:56,135 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 30 [2019-10-13 19:52:56,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:52:56,135 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2019-10-13 19:52:56,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:52:56,135 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2019-10-13 19:52:56,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 19:52:56,136 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:52:56,137 INFO L380 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] [2019-10-13 19:52:56,137 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:52:56,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:52:56,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1207168369, now seen corresponding path program 1 times [2019-10-13 19:52:56,138 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:52:56,138 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126993209] [2019-10-13 19:52:56,138 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:56,138 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:56,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:52:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:52:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:52:56,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126993209] [2019-10-13 19:52:56,233 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:52:56,234 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:52:56,234 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864897666] [2019-10-13 19:52:56,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:52:56,235 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:52:56,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:52:56,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:52:56,236 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 4 states. [2019-10-13 19:52:56,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:52:56,361 INFO L93 Difference]: Finished difference Result 94 states and 122 transitions. [2019-10-13 19:52:56,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:52:56,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-13 19:52:56,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:52:56,363 INFO L225 Difference]: With dead ends: 94 [2019-10-13 19:52:56,363 INFO L226 Difference]: Without dead ends: 55 [2019-10-13 19:52:56,364 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:52:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-13 19:52:56,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2019-10-13 19:52:56,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 19:52:56,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-10-13 19:52:56,372 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2019-10-13 19:52:56,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:52:56,373 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-10-13 19:52:56,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:52:56,373 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-10-13 19:52:56,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 19:52:56,375 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:52:56,375 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:52:56,375 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:52:56,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:52:56,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1413365853, now seen corresponding path program 1 times [2019-10-13 19:52:56,376 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:52:56,376 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516697614] [2019-10-13 19:52:56,376 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:56,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:56,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:52:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:52:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 19:52:56,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516697614] [2019-10-13 19:52:56,494 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802443258] [2019-10-13 19:52:56,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:52:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:52:56,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 19:52:56,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:52:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 19:52:56,620 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 19:52:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 19:52:56,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [80294936] [2019-10-13 19:52:56,669 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 47 [2019-10-13 19:52:56,709 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 19:52:56,709 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 19:52:56,782 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 19:52:56,783 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 21 root evaluator evaluations with a maximum evaluation depth of 2. Performed 21 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Never found a fixpoint. Largest state had 38 variables. [2019-10-13 19:52:56,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:52:56,788 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 19:52:56,830 INFO L227 lantSequenceWeakener]: Weakened 5 states. On average, predicates are now at 96.67% of their original sizes. [2019-10-13 19:52:56,831 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 19:52:56,837 INFO L553 sIntCurrentIteration]: We unified 45 AI predicates to 45 [2019-10-13 19:52:56,837 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 19:52:56,838 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 19:52:56,838 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4] total 8 [2019-10-13 19:52:56,838 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166161456] [2019-10-13 19:52:56,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:52:56,840 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 19:52:56,840 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 19:52:56,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:52:56,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:52:56,841 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 3 states. [2019-10-13 19:52:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:52:56,844 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2019-10-13 19:52:56,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:52:56,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2019-10-13 19:52:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:52:56,845 INFO L225 Difference]: With dead ends: 47 [2019-10-13 19:52:56,845 INFO L226 Difference]: Without dead ends: 0 [2019-10-13 19:52:56,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:52:56,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-13 19:52:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-13 19:52:56,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-13 19:52:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-13 19:52:56,849 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2019-10-13 19:52:56,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:52:56,849 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-13 19:52:56,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:52:56,850 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-13 19:52:56,850 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-13 19:52:57,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:52:57,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-13 19:52:57,148 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-13 19:52:57,149 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-13 19:52:57,149 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-13 19:52:57,149 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-13 19:52:57,149 INFO L439 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: (and (<= 0 (+ ~SIZE~0 32768)) (<= ~SIZE~0 32767)) [2019-10-13 19:52:57,149 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-13 19:52:57,150 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-13 19:52:57,150 INFO L443 ceAbstractionStarter]: For program point L27-2(lines 27 30) no Hoare annotation was computed. [2019-10-13 19:52:57,150 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 8 64) no Hoare annotation was computed. [2019-10-13 19:52:57,152 INFO L439 ceAbstractionStarter]: At program point L27-3(lines 27 30) the Hoare annotation is: (or (not (<= 0 (+ |old(~SIZE~0)| 32768))) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,152 INFO L443 ceAbstractionStarter]: For program point L27-4(lines 27 30) no Hoare annotation was computed. [2019-10-13 19:52:57,152 INFO L443 ceAbstractionStarter]: For program point L52-2(lines 52 55) no Hoare annotation was computed. [2019-10-13 19:52:57,152 INFO L439 ceAbstractionStarter]: At program point L52-3(lines 52 55) the Hoare annotation is: (or (not (<= 0 (+ |old(~SIZE~0)| 32768))) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,153 INFO L443 ceAbstractionStarter]: For program point L52-4(lines 52 55) no Hoare annotation was computed. [2019-10-13 19:52:57,153 INFO L443 ceAbstractionStarter]: For program point L11(lines 11 62) no Hoare annotation was computed. [2019-10-13 19:52:57,153 INFO L443 ceAbstractionStarter]: For program point L11-2(lines 11 62) no Hoare annotation was computed. [2019-10-13 19:52:57,154 INFO L443 ceAbstractionStarter]: For program point L61(line 61) no Hoare annotation was computed. [2019-10-13 19:52:57,154 INFO L443 ceAbstractionStarter]: For program point L37-2(lines 37 40) no Hoare annotation was computed. [2019-10-13 19:52:57,154 INFO L439 ceAbstractionStarter]: At program point L37-3(lines 37 40) the Hoare annotation is: (or (not (<= 0 (+ |old(~SIZE~0)| 32768))) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,155 INFO L443 ceAbstractionStarter]: For program point L37-4(lines 37 40) no Hoare annotation was computed. [2019-10-13 19:52:57,155 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 8 64) no Hoare annotation was computed. [2019-10-13 19:52:57,155 INFO L439 ceAbstractionStarter]: At program point mainENTRY(lines 8 64) the Hoare annotation is: (or (not (<= 0 (+ |old(~SIZE~0)| 32768))) (and (<= 0 (+ ~SIZE~0 32768)) (<= ~SIZE~0 32767)) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,155 INFO L443 ceAbstractionStarter]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2019-10-13 19:52:57,155 INFO L439 ceAbstractionStarter]: At program point L22-3(lines 22 25) the Hoare annotation is: (or (not (<= 0 (+ |old(~SIZE~0)| 32768))) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,155 INFO L443 ceAbstractionStarter]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2019-10-13 19:52:57,156 INFO L443 ceAbstractionStarter]: For program point L47-2(lines 47 50) no Hoare annotation was computed. [2019-10-13 19:52:57,156 INFO L439 ceAbstractionStarter]: At program point L47-3(lines 47 50) the Hoare annotation is: (or (not (<= 0 (+ |old(~SIZE~0)| 32768))) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,156 INFO L443 ceAbstractionStarter]: For program point L47-4(lines 47 50) no Hoare annotation was computed. [2019-10-13 19:52:57,156 INFO L443 ceAbstractionStarter]: For program point L32-2(lines 32 35) no Hoare annotation was computed. [2019-10-13 19:52:57,156 INFO L439 ceAbstractionStarter]: At program point L32-3(lines 32 35) the Hoare annotation is: (or (not (<= 0 (+ |old(~SIZE~0)| 32768))) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,156 INFO L443 ceAbstractionStarter]: For program point L32-4(lines 32 35) no Hoare annotation was computed. [2019-10-13 19:52:57,157 INFO L443 ceAbstractionStarter]: For program point L57-2(lines 57 60) no Hoare annotation was computed. [2019-10-13 19:52:57,157 INFO L439 ceAbstractionStarter]: At program point L57-3(lines 57 60) the Hoare annotation is: (or (not (<= 0 (+ |old(~SIZE~0)| 32768))) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,157 INFO L439 ceAbstractionStarter]: At program point L57-4(lines 57 60) the Hoare annotation is: (or (= main_~sum~0 0) (not (<= 0 (+ |old(~SIZE~0)| 32768))) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,157 INFO L443 ceAbstractionStarter]: For program point L17-2(lines 17 20) no Hoare annotation was computed. [2019-10-13 19:52:57,157 INFO L439 ceAbstractionStarter]: At program point L17-3(lines 17 20) the Hoare annotation is: (or (not (<= 0 (+ |old(~SIZE~0)| 32768))) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,157 INFO L443 ceAbstractionStarter]: For program point L17-4(lines 17 20) no Hoare annotation was computed. [2019-10-13 19:52:57,157 INFO L443 ceAbstractionStarter]: For program point L42-2(lines 42 45) no Hoare annotation was computed. [2019-10-13 19:52:57,158 INFO L439 ceAbstractionStarter]: At program point L42-3(lines 42 45) the Hoare annotation is: (or (not (<= 0 (+ |old(~SIZE~0)| 32768))) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,158 INFO L443 ceAbstractionStarter]: For program point L42-4(lines 42 45) no Hoare annotation was computed. [2019-10-13 19:52:57,158 INFO L443 ceAbstractionStarter]: For program point L3-3(line 3) no Hoare annotation was computed. [2019-10-13 19:52:57,158 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(line 3) the Hoare annotation is: true [2019-10-13 19:52:57,158 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(line 3) no Hoare annotation was computed. [2019-10-13 19:52:57,158 INFO L443 ceAbstractionStarter]: For program point L3(line 3) no Hoare annotation was computed. [2019-10-13 19:52:57,159 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2019-10-13 19:52:57,159 INFO L443 ceAbstractionStarter]: For program point L3-1(line 3) no Hoare annotation was computed. [2019-10-13 19:52:57,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:52:57 BoogieIcfgContainer [2019-10-13 19:52:57,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 19:52:57,177 INFO L168 Benchmark]: Toolchain (without parser) took 2695.77 ms. Allocated memory was 137.9 MB in the beginning and 233.8 MB in the end (delta: 95.9 MB). Free memory was 102.7 MB in the beginning and 149.4 MB in the end (delta: -46.7 MB). Peak memory consumption was 49.3 MB. Max. memory is 7.1 GB. [2019-10-13 19:52:57,178 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 19:52:57,178 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.72 ms. Allocated memory is still 137.9 MB. Free memory was 102.5 MB in the beginning and 91.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2019-10-13 19:52:57,179 INFO L168 Benchmark]: Boogie Preprocessor took 117.52 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.7 MB in the beginning and 179.7 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2019-10-13 19:52:57,180 INFO L168 Benchmark]: RCFGBuilder took 392.60 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 158.9 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2019-10-13 19:52:57,181 INFO L168 Benchmark]: TraceAbstraction took 1820.10 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 158.9 MB in the beginning and 149.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 41.5 MB. Max. memory is 7.1 GB. [2019-10-13 19:52:57,185 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 361.72 ms. Allocated memory is still 137.9 MB. Free memory was 102.5 MB in the beginning and 91.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.52 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.7 MB in the beginning and 179.7 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 392.60 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 158.9 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1820.10 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 158.9 MB in the beginning and 149.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 41.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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 - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: !(0 <= \old(SIZE) + 32768) || !(\old(SIZE) <= 32767) - InvariantResult [Line: 52]: Loop Invariant Derived loop invariant: !(0 <= \old(SIZE) + 32768) || !(\old(SIZE) <= 32767) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: !(0 <= \old(SIZE) + 32768) || !(\old(SIZE) <= 32767) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: !(0 <= \old(SIZE) + 32768) || !(\old(SIZE) <= 32767) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: !(0 <= \old(SIZE) + 32768) || !(\old(SIZE) <= 32767) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: !(0 <= \old(SIZE) + 32768) || !(\old(SIZE) <= 32767) - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: !(0 <= \old(SIZE) + 32768) || !(\old(SIZE) <= 32767) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: !(0 <= \old(SIZE) + 32768) || !(\old(SIZE) <= 32767) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: !(0 <= \old(SIZE) + 32768) || !(\old(SIZE) <= 32767) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 46 locations, 1 error locations. Result: SAFE, OverallTime: 1.7s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 162 SDtfs, 59 SDslu, 137 SDs, 0 SdLazy, 117 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=3, 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, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 19 PreInvPairs, 20 NumberOfFragments, 145 HoareAnnotationTreeSize, 19 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 15 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 210 NumberOfCodeBlocks, 210 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 249 ConstructedInterpolants, 0 QuantifiedInterpolants, 13147 SizeOfPredicates, 3 NumberOfNonLiveVariables, 134 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 27/30 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 119, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.9777777777777777, AVG_VARS_REMOVED_DURING_WEAKENING: 0.8, AVG_WEAKENED_CONJUNCTS: 0.35555555555555557, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...