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_const_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 05:35:29,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 05:35:29,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 05:35:29,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 05:35:29,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 05:35:29,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 05:35:29,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 05:35:29,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 05:35:29,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 05:35:29,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 05:35:29,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 05:35:29,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 05:35:29,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 05:35:29,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 05:35:29,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 05:35:29,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 05:35:29,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 05:35:29,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 05:35:29,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 05:35:29,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 05:35:29,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 05:35:29,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 05:35:29,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 05:35:29,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 05:35:29,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 05:35:29,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 05:35:29,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 05:35:29,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 05:35:29,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 05:35:29,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 05:35:29,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 05:35:29,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 05:35:29,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 05:35:29,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 05:35:29,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 05:35:29,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 05:35:29,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 05:35:29,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 05:35:29,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 05:35:29,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 05:35:29,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 05:35:29,096 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 05:35:29,121 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 05:35:29,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 05:35:29,122 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 05:35:29,125 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 05:35:29,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 05:35:29,126 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 05:35:29,126 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 05:35:29,126 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 05:35:29,126 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 05:35:29,126 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 05:35:29,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 05:35:29,129 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 05:35:29,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 05:35:29,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 05:35:29,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 05:35:29,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 05:35:29,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 05:35:29,131 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 05:35:29,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 05:35:29,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 05:35:29,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 05:35:29,132 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 05:35:29,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 05:35:29,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 05:35:29,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 05:35:29,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 05:35:29,133 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 05:35:29,134 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 05:35:29,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 05:35:29,134 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 05:35:29,185 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 05:35:29,205 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 05:35:29,210 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 05:35:29,211 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 05:35:29,212 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 05:35:29,212 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m4.c [2019-09-09 05:35:29,275 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a1834931/5066cc7155cb4fef87348d2cea17fcd9/FLAGc0a1ce4af [2019-09-09 05:35:29,759 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 05:35:29,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m4.c [2019-09-09 05:35:29,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a1834931/5066cc7155cb4fef87348d2cea17fcd9/FLAGc0a1ce4af [2019-09-09 05:35:30,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a1834931/5066cc7155cb4fef87348d2cea17fcd9 [2019-09-09 05:35:30,188 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 05:35:30,190 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 05:35:30,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 05:35:30,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 05:35:30,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 05:35:30,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:35:30" (1/1) ... [2019-09-09 05:35:30,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5690e784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:30, skipping insertion in model container [2019-09-09 05:35:30,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:35:30" (1/1) ... [2019-09-09 05:35:30,209 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 05:35:30,227 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 05:35:30,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 05:35:30,425 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 05:35:30,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 05:35:30,549 INFO L192 MainTranslator]: Completed translation [2019-09-09 05:35:30,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:30 WrapperNode [2019-09-09 05:35:30,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 05:35:30,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 05:35:30,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 05:35:30,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 05:35:30,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:30" (1/1) ... [2019-09-09 05:35:30,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:30" (1/1) ... [2019-09-09 05:35:30,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:30" (1/1) ... [2019-09-09 05:35:30,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:30" (1/1) ... [2019-09-09 05:35:30,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:30" (1/1) ... [2019-09-09 05:35:30,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:30" (1/1) ... [2019-09-09 05:35:30,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:30" (1/1) ... [2019-09-09 05:35:30,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 05:35:30,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 05:35:30,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 05:35:30,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 05:35:30,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:30" (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 05:35:30,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 05:35:30,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 05:35:30,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-09 05:35:30,651 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 05:35:30,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 05:35:30,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-09 05:35:30,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-09 05:35:30,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-09-09 05:35:30,652 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-09 05:35:30,652 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 05:35:30,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-09 05:35:30,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-09 05:35:30,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-09 05:35:30,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 05:35:30,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 05:35:30,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-09 05:35:30,965 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 05:35:30,966 INFO L283 CfgBuilder]: Removed 9 assume(true) statements. [2019-09-09 05:35:30,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:35:30 BoogieIcfgContainer [2019-09-09 05:35:30,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 05:35:30,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 05:35:30,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 05:35:30,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 05:35:30,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:35:30" (1/3) ... [2019-09-09 05:35:30,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d534cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:35:30, skipping insertion in model container [2019-09-09 05:35:30,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:30" (2/3) ... [2019-09-09 05:35:30,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d534cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:35:30, skipping insertion in model container [2019-09-09 05:35:30,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:35:30" (3/3) ... [2019-09-09 05:35:30,976 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m4.c [2019-09-09 05:35:30,986 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 05:35:30,994 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 05:35:31,011 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 05:35:31,048 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 05:35:31,048 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 05:35:31,049 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 05:35:31,049 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 05:35:31,049 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 05:35:31,049 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 05:35:31,049 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 05:35:31,049 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 05:35:31,067 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-09-09 05:35:31,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-09 05:35:31,078 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 05:35:31,079 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 05:35:31,081 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 05:35:31,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:35:31,086 INFO L82 PathProgramCache]: Analyzing trace with hash 299774862, now seen corresponding path program 1 times [2019-09-09 05:35:31,088 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 05:35:31,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:31,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 05:35:31,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:31,128 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 05:35:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 05:35:31,234 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 05:35:31,237 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 05:35:31,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-09 05:35:31,238 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 05:35:31,243 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-09 05:35:31,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-09 05:35:31,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-09 05:35:31,258 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2019-09-09 05:35:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 05:35:31,277 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2019-09-09 05:35:31,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-09 05:35:31,278 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 28 [2019-09-09 05:35:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 05:35:31,286 INFO L225 Difference]: With dead ends: 45 [2019-09-09 05:35:31,286 INFO L226 Difference]: Without dead ends: 38 [2019-09-09 05:35:31,288 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 05:35:31,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-09 05:35:31,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-09 05:35:31,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-09 05:35:31,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-09-09 05:35:31,325 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2019-09-09 05:35:31,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 05:35:31,325 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-09-09 05:35:31,326 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-09 05:35:31,326 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-09-09 05:35:31,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-09 05:35:31,327 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 05:35:31,327 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 05:35:31,327 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 05:35:31,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:35:31,328 INFO L82 PathProgramCache]: Analyzing trace with hash 268068598, now seen corresponding path program 1 times [2019-09-09 05:35:31,328 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 05:35:31,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:31,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 05:35:31,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:31,330 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 05:35:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 05:35:31,450 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 05:35:31,450 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 05:35:31,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 05:35:31,451 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 05:35:31,452 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 05:35:31,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 05:35:31,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 05:35:31,453 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 5 states. [2019-09-09 05:35:31,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 05:35:31,566 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2019-09-09 05:35:31,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-09 05:35:31,567 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-09-09 05:35:31,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 05:35:31,569 INFO L225 Difference]: With dead ends: 56 [2019-09-09 05:35:31,571 INFO L226 Difference]: Without dead ends: 53 [2019-09-09 05:35:31,572 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 05:35:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-09 05:35:31,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-09-09 05:35:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-09 05:35:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2019-09-09 05:35:31,583 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 28 [2019-09-09 05:35:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 05:35:31,583 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2019-09-09 05:35:31,583 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 05:35:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2019-09-09 05:35:31,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-09 05:35:31,586 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 05:35:31,586 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 05:35:31,587 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 05:35:31,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:35:31,588 INFO L82 PathProgramCache]: Analyzing trace with hash 962591476, now seen corresponding path program 1 times [2019-09-09 05:35:31,588 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 05:35:31,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:31,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 05:35:31,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:31,592 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 05:35:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 05:35:31,684 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 05:35:31,684 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 05:35:31,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 05:35:31,685 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 05:35:31,685 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 05:35:31,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 05:35:31,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 05:35:31,686 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand 3 states. [2019-09-09 05:35:31,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 05:35:31,764 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2019-09-09 05:35:31,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 05:35:31,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2019-09-09 05:35:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 05:35:31,766 INFO L225 Difference]: With dead ends: 55 [2019-09-09 05:35:31,766 INFO L226 Difference]: Without dead ends: 55 [2019-09-09 05:35:31,767 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 05:35:31,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-09 05:35:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-09-09 05:35:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-09 05:35:31,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2019-09-09 05:35:31,774 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 30 [2019-09-09 05:35:31,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 05:35:31,775 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2019-09-09 05:35:31,775 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 05:35:31,775 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2019-09-09 05:35:31,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-09 05:35:31,776 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 05:35:31,777 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 05:35:31,777 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 05:35:31,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:35:31,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1516091022, now seen corresponding path program 1 times [2019-09-09 05:35:31,778 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 05:35:31,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:31,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 05:35:31,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:31,779 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 05:35:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 05:35:31,860 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 05:35:31,861 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 05:35:31,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 05:35:31,861 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 05:35:31,861 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 05:35:31,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 05:35:31,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 05:35:31,862 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 4 states. [2019-09-09 05:35:32,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 05:35:32,005 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2019-09-09 05:35:32,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 05:35:32,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-09-09 05:35:32,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 05:35:32,007 INFO L225 Difference]: With dead ends: 56 [2019-09-09 05:35:32,007 INFO L226 Difference]: Without dead ends: 56 [2019-09-09 05:35:32,008 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 05:35:32,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-09 05:35:32,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-09-09 05:35:32,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-09 05:35:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-09-09 05:35:32,014 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2019-09-09 05:35:32,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 05:35:32,014 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-09-09 05:35:32,014 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 05:35:32,014 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-09-09 05:35:32,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-09 05:35:32,016 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 05:35:32,016 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 05:35:32,016 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 05:35:32,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:35:32,017 INFO L82 PathProgramCache]: Analyzing trace with hash 94574052, now seen corresponding path program 1 times [2019-09-09 05:35:32,017 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 05:35:32,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:32,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 05:35:32,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:32,019 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 05:35:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 05:35:32,116 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 05:35:32,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 05:35:32,117 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 05:35:32,118 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 47 with the following transitions: [2019-09-09 05:35:32,122 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 05:35:32,178 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 05:35:32,179 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 05:35:32,264 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 05:35:32,266 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 05:35:32,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:35:32,271 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 05:35:32,318 INFO L227 lantSequenceWeakener]: Weakened 5 states. On average, predicates are now at 77.5% of their original sizes. [2019-09-09 05:35:32,318 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 05:35:32,327 INFO L420 sIntCurrentIteration]: We unified 45 AI predicates to 45 [2019-09-09 05:35:32,331 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 05:35:32,332 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 05:35:32,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2019-09-09 05:35:32,332 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 05:35:32,333 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 05:35:32,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 05:35:32,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 05:35:32,334 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 4 states. [2019-09-09 05:35:32,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 05:35:32,337 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2019-09-09 05:35:32,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 05:35:32,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-09-09 05:35:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 05:35:32,338 INFO L225 Difference]: With dead ends: 7 [2019-09-09 05:35:32,338 INFO L226 Difference]: Without dead ends: 0 [2019-09-09 05:35:32,338 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 05:35:32,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-09 05:35:32,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-09 05:35:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-09 05:35:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-09 05:35:32,339 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2019-09-09 05:35:32,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 05:35:32,340 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-09 05:35:32,340 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 05:35:32,340 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-09 05:35:32,340 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-09 05:35:32,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.09 05:35:32 BoogieIcfgContainer [2019-09-09 05:35:32,347 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-09 05:35:32,352 INFO L168 Benchmark]: Toolchain (without parser) took 2159.52 ms. Allocated memory was 132.1 MB in the beginning and 219.7 MB in the end (delta: 87.6 MB). Free memory was 87.6 MB in the beginning and 179.1 MB in the end (delta: -91.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-09 05:35:32,354 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 132.1 MB. Free memory was 106.6 MB in the beginning and 106.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-09 05:35:32,357 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.58 ms. Allocated memory was 132.1 MB in the beginning and 197.1 MB in the end (delta: 65.0 MB). Free memory was 87.4 MB in the beginning and 173.1 MB in the end (delta: -85.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. [2019-09-09 05:35:32,358 INFO L168 Benchmark]: Boogie Preprocessor took 41.65 ms. Allocated memory is still 197.1 MB. Free memory was 173.1 MB in the beginning and 171.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-09-09 05:35:32,360 INFO L168 Benchmark]: RCFGBuilder took 374.86 ms. Allocated memory is still 197.1 MB. Free memory was 171.2 MB in the beginning and 151.3 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2019-09-09 05:35:32,361 INFO L168 Benchmark]: TraceAbstraction took 1379.64 ms. Allocated memory was 197.1 MB in the beginning and 219.7 MB in the end (delta: 22.5 MB). Free memory was 150.7 MB in the beginning and 179.1 MB in the end (delta: -28.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-09 05:35:32,367 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 132.1 MB. Free memory was 106.6 MB in the beginning and 106.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 358.58 ms. Allocated memory was 132.1 MB in the beginning and 197.1 MB in the end (delta: 65.0 MB). Free memory was 87.4 MB in the beginning and 173.1 MB in the end (delta: -85.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.65 ms. Allocated memory is still 197.1 MB. Free memory was 173.1 MB in the beginning and 171.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 374.86 ms. Allocated memory is still 197.1 MB. Free memory was 171.2 MB in the beginning and 151.3 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1379.64 ms. Allocated memory was 197.1 MB in the beginning and 219.7 MB in the end (delta: 22.5 MB). Free memory was 150.7 MB in the beginning and 179.1 MB in the end (delta: -28.4 MB). There was no memory consumed. 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, 0.2s 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...