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/array-crafted/zero_sum_const4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 05:35:23,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 05:35:23,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 05:35:23,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 05:35:23,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 05:35:23,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 05:35:23,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 05:35:23,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 05:35:23,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 05:35:23,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 05:35:23,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 05:35:23,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 05:35:23,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 05:35:23,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 05:35:23,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 05:35:23,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 05:35:23,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 05:35:23,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 05:35:23,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 05:35:23,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 05:35:23,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 05:35:23,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 05:35:23,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 05:35:23,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 05:35:23,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 05:35:23,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 05:35:23,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 05:35:23,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 05:35:23,214 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 05:35:23,214 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 05:35:23,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 05:35:23,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 05:35:23,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 05:35:23,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 05:35:23,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 05:35:23,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 05:35:23,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 05:35:23,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 05:35:23,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 05:35:23,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 05:35:23,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 05:35:23,222 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 [2019-09-09 05:35:23,236 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 05:35:23,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 05:35:23,236 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 05:35:23,237 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 05:35:23,237 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 05:35:23,238 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 05:35:23,238 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 05:35:23,238 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 05:35:23,238 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 05:35:23,238 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 05:35:23,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 05:35:23,239 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 05:35:23,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 05:35:23,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 05:35:23,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 05:35:23,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 05:35:23,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 05:35:23,240 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 05:35:23,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 05:35:23,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 05:35:23,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 05:35:23,241 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 05:35:23,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 05:35:23,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 05:35:23,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 05:35:23,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 05:35:23,242 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 05:35:23,243 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 05:35:23,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 05:35:23,243 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 05:35:23,271 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 05:35:23,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 05:35:23,287 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 05:35:23,288 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 05:35:23,289 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 05:35:23,290 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2019-09-09 05:35:23,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c5f1cae5/cf62672d688840168adcf32c4c1e64ae/FLAG296f9e8e3 [2019-09-09 05:35:23,808 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 05:35:23,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2019-09-09 05:35:23,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c5f1cae5/cf62672d688840168adcf32c4c1e64ae/FLAG296f9e8e3 [2019-09-09 05:35:24,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c5f1cae5/cf62672d688840168adcf32c4c1e64ae [2019-09-09 05:35:24,240 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 05:35:24,242 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 05:35:24,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 05:35:24,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 05:35:24,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 05:35:24,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:35:24" (1/1) ... [2019-09-09 05:35:24,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e607a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:24, skipping insertion in model container [2019-09-09 05:35:24,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:35:24" (1/1) ... [2019-09-09 05:35:24,261 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 05:35:24,284 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 05:35:24,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 05:35:24,517 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 05:35:24,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 05:35:24,643 INFO L192 MainTranslator]: Completed translation [2019-09-09 05:35:24,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:24 WrapperNode [2019-09-09 05:35:24,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 05:35:24,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 05:35:24,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 05:35:24,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 05:35:24,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:24" (1/1) ... [2019-09-09 05:35:24,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:24" (1/1) ... [2019-09-09 05:35:24,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:24" (1/1) ... [2019-09-09 05:35:24,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:24" (1/1) ... [2019-09-09 05:35:24,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:24" (1/1) ... [2019-09-09 05:35:24,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:24" (1/1) ... [2019-09-09 05:35:24,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:24" (1/1) ... [2019-09-09 05:35:24,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 05:35:24,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 05:35:24,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 05:35:24,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 05:35:24,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:24" (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 [2019-09-09 05:35:24,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 05:35:24,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 05:35:24,749 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-09 05:35:24,749 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 05:35:24,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 05:35:24,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-09 05:35:24,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-09 05:35:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-09-09 05:35:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-09 05:35:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 05:35:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-09 05:35:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-09 05:35:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-09 05:35:24,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 05:35:24,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 05:35:24,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-09 05:35:25,062 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 05:35:25,062 INFO L283 CfgBuilder]: Removed 9 assume(true) statements. [2019-09-09 05:35:25,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:35:25 BoogieIcfgContainer [2019-09-09 05:35:25,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 05:35:25,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 05:35:25,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 05:35:25,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 05:35:25,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:35:24" (1/3) ... [2019-09-09 05:35:25,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f35731f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:35:25, skipping insertion in model container [2019-09-09 05:35:25,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:24" (2/3) ... [2019-09-09 05:35:25,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f35731f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:35:25, skipping insertion in model container [2019-09-09 05:35:25,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:35:25" (3/3) ... [2019-09-09 05:35:25,071 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2019-09-09 05:35:25,081 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 05:35:25,088 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 05:35:25,105 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 05:35:25,149 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 05:35:25,149 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 05:35:25,149 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 05:35:25,150 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 05:35:25,150 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 05:35:25,150 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 05:35:25,150 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 05:35:25,150 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 05:35:25,166 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-09-09 05:35:25,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-09 05:35:25,176 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 05:35:25,176 INFO L399 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] [2019-09-09 05:35:25,178 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 05:35:25,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:35:25,183 INFO L82 PathProgramCache]: Analyzing trace with hash 299774862, now seen corresponding path program 1 times [2019-09-09 05:35:25,185 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 05:35:25,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:25,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 05:35:25,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:25,225 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 05:35:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 05:35:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 05:35:25,331 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 05:35:25,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-09 05:35:25,331 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 05:35:25,336 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-09 05:35:25,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-09 05:35:25,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-09 05:35:25,350 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2019-09-09 05:35:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 05:35:25,367 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2019-09-09 05:35:25,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-09 05:35:25,369 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 28 [2019-09-09 05:35:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 05:35:25,377 INFO L225 Difference]: With dead ends: 45 [2019-09-09 05:35:25,377 INFO L226 Difference]: Without dead ends: 38 [2019-09-09 05:35:25,379 INFO L628 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 [2019-09-09 05:35:25,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-09 05:35:25,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-09 05:35:25,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-09 05:35:25,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-09-09 05:35:25,413 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2019-09-09 05:35:25,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 05:35:25,414 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-09-09 05:35:25,414 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-09 05:35:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-09-09 05:35:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-09 05:35:25,415 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 05:35:25,416 INFO L399 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] [2019-09-09 05:35:25,416 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 05:35:25,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:35:25,417 INFO L82 PathProgramCache]: Analyzing trace with hash 268068598, now seen corresponding path program 1 times [2019-09-09 05:35:25,417 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 05:35:25,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:25,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 05:35:25,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:25,420 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 05:35:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 05:35:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 05:35:25,585 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 05:35:25,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 05:35:25,585 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 05:35:25,587 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 05:35:25,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 05:35:25,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 05:35:25,588 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 5 states. [2019-09-09 05:35:25,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 05:35:25,686 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2019-09-09 05:35:25,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-09 05:35:25,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-09-09 05:35:25,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 05:35:25,688 INFO L225 Difference]: With dead ends: 56 [2019-09-09 05:35:25,689 INFO L226 Difference]: Without dead ends: 53 [2019-09-09 05:35:25,691 INFO L628 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 [2019-09-09 05:35:25,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-09 05:35:25,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-09-09 05:35:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-09 05:35:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2019-09-09 05:35:25,704 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 28 [2019-09-09 05:35:25,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 05:35:25,705 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2019-09-09 05:35:25,705 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 05:35:25,705 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2019-09-09 05:35:25,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-09 05:35:25,707 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 05:35:25,707 INFO L399 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] [2019-09-09 05:35:25,707 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 05:35:25,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:35:25,708 INFO L82 PathProgramCache]: Analyzing trace with hash 962591476, now seen corresponding path program 1 times [2019-09-09 05:35:25,708 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 05:35:25,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:25,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 05:35:25,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:25,710 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 05:35:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 05:35:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-09 05:35:25,769 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 05:35:25,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 05:35:25,769 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 05:35:25,770 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 05:35:25,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 05:35:25,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 05:35:25,772 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand 3 states. [2019-09-09 05:35:25,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 05:35:25,867 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2019-09-09 05:35:25,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 05:35:25,868 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2019-09-09 05:35:25,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 05:35:25,869 INFO L225 Difference]: With dead ends: 55 [2019-09-09 05:35:25,870 INFO L226 Difference]: Without dead ends: 55 [2019-09-09 05:35:25,870 INFO L628 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 [2019-09-09 05:35:25,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-09 05:35:25,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-09-09 05:35:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-09 05:35:25,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2019-09-09 05:35:25,877 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 30 [2019-09-09 05:35:25,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 05:35:25,878 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2019-09-09 05:35:25,878 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 05:35:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2019-09-09 05:35:25,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-09 05:35:25,880 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 05:35:25,881 INFO L399 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] [2019-09-09 05:35:25,881 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 05:35:25,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:35:25,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1516091022, now seen corresponding path program 1 times [2019-09-09 05:35:25,882 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 05:35:25,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:25,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 05:35:25,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:25,883 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 05:35:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 05:35:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-09 05:35:25,955 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 05:35:25,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 05:35:25,956 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 05:35:25,956 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 05:35:25,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 05:35:25,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 05:35:25,957 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 4 states. [2019-09-09 05:35:26,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 05:35:26,089 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2019-09-09 05:35:26,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 05:35:26,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-09-09 05:35:26,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 05:35:26,091 INFO L225 Difference]: With dead ends: 56 [2019-09-09 05:35:26,091 INFO L226 Difference]: Without dead ends: 56 [2019-09-09 05:35:26,091 INFO L628 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 [2019-09-09 05:35:26,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-09 05:35:26,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-09-09 05:35:26,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-09 05:35:26,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-09-09 05:35:26,098 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2019-09-09 05:35:26,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 05:35:26,098 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-09-09 05:35:26,098 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 05:35:26,098 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-09-09 05:35:26,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-09 05:35:26,100 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 05:35:26,100 INFO L399 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] [2019-09-09 05:35:26,101 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 05:35:26,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:35:26,101 INFO L82 PathProgramCache]: Analyzing trace with hash 94574052, now seen corresponding path program 1 times [2019-09-09 05:35:26,101 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 05:35:26,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:26,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 05:35:26,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:26,103 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 05:35:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 05:35:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-09 05:35:26,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 05:35:26,241 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 05:35:26,242 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 47 with the following transitions: [2019-09-09 05:35:26,247 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [8], [14], [16], [18], [22], [28], [30], [32], [36], [42], [44], [46], [50], [56], [58], [60], [64], [70], [72], [74], [78], [84], [86], [88], [92], [98], [100], [102], [106], [112], [114], [116], [120], [126], [128], [130], [140], [143], [145], [151], [152], [153], [155] [2019-09-09 05:35:26,283 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 05:35:26,284 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 05:35:26,369 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 05:35:26,371 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 24 root evaluator evaluations with a maximum evaluation depth of 3. Performed 24 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 40 variables. [2019-09-09 05:35:26,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:35:26,375 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 05:35:26,429 INFO L227 lantSequenceWeakener]: Weakened 5 states. On average, predicates are now at 77.5% of their original sizes. [2019-09-09 05:35:26,429 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 05:35:26,438 INFO L420 sIntCurrentIteration]: We unified 45 AI predicates to 45 [2019-09-09 05:35:26,438 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 05:35:26,439 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 05:35:26,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2019-09-09 05:35:26,439 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 05:35:26,440 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 05:35:26,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 05:35:26,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 05:35:26,441 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 4 states. [2019-09-09 05:35:26,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 05:35:26,443 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2019-09-09 05:35:26,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 05:35:26,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-09-09 05:35:26,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 05:35:26,444 INFO L225 Difference]: With dead ends: 7 [2019-09-09 05:35:26,444 INFO L226 Difference]: Without dead ends: 0 [2019-09-09 05:35:26,444 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 05:35:26,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-09 05:35:26,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-09 05:35:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-09 05:35:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-09 05:35:26,445 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2019-09-09 05:35:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 05:35:26,446 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-09 05:35:26,446 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 05:35:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-09 05:35:26,446 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-09 05:35:26,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.09 05:35:26 BoogieIcfgContainer [2019-09-09 05:35:26,452 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-09 05:35:26,454 INFO L168 Benchmark]: Toolchain (without parser) took 2211.26 ms. Allocated memory was 134.7 MB in the beginning and 227.5 MB in the end (delta: 92.8 MB). Free memory was 90.4 MB in the beginning and 180.3 MB in the end (delta: -89.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2019-09-09 05:35:26,455 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 134.7 MB. Free memory was 109.1 MB in the beginning and 108.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-09 05:35:26,457 INFO L168 Benchmark]: CACSL2BoogieTranslator took 399.83 ms. Allocated memory was 134.7 MB in the beginning and 199.2 MB in the end (delta: 64.5 MB). Free memory was 90.2 MB in the beginning and 175.3 MB in the end (delta: -85.1 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. [2019-09-09 05:35:26,458 INFO L168 Benchmark]: Boogie Preprocessor took 45.29 ms. Allocated memory is still 199.2 MB. Free memory was 175.3 MB in the beginning and 173.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-09-09 05:35:26,458 INFO L168 Benchmark]: RCFGBuilder took 373.65 ms. Allocated memory is still 199.2 MB. Free memory was 173.5 MB in the beginning and 153.4 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2019-09-09 05:35:26,459 INFO L168 Benchmark]: TraceAbstraction took 1386.97 ms. Allocated memory was 199.2 MB in the beginning and 227.5 MB in the end (delta: 28.3 MB). Free memory was 153.4 MB in the beginning and 180.3 MB in the end (delta: -26.9 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-09-09 05:35:26,464 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 134.7 MB. Free memory was 109.1 MB in the beginning and 108.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 399.83 ms. Allocated memory was 134.7 MB in the beginning and 199.2 MB in the end (delta: 64.5 MB). Free memory was 90.2 MB in the beginning and 175.3 MB in the end (delta: -85.1 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.29 ms. Allocated memory is still 199.2 MB. Free memory was 175.3 MB in the beginning and 173.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 373.65 ms. Allocated memory is still 199.2 MB. Free memory was 173.5 MB in the beginning and 153.4 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1386.97 ms. Allocated memory was 199.2 MB in the beginning and 227.5 MB in the end (delta: 28.3 MB). Free memory was 153.4 MB in the beginning and 180.3 MB in the end (delta: -26.9 MB). Peak memory consumption was 1.4 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 45 locations, 1 error locations. SAFE Result, 1.3s OverallTime, 5 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 160 SDtfs, 61 SDslu, 121 SDs, 0 SdLazy, 134 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s 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, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9805555555555555 AbsIntWeakeningRatio, 0.8444444444444444 AbsIntAvgWeakeningVarsNumRemoved, 0.4888888888888889 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 164 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 159 ConstructedInterpolants, 0 QuantifiedInterpolants, 7747 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 11/12 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...