java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:25:35,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:25:35,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:25:35,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:25:35,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:25:35,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:25:35,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:25:35,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:25:35,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:25:35,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:25:35,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:25:35,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:25:35,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:25:35,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:25:35,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:25:35,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:25:35,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:25:35,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:25:35,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:25:35,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:25:35,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:25:35,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:25:35,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:25:35,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:25:35,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 13:25:35,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 13:25:35,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 13:25:35,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 13:25:35,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 13:25:35,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 13:25:35,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:25:35,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:25:35,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:25:35,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:25:35,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:25:35,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:25:35,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:25:35,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:25:35,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:25:35,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:25:35,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:25:35,239 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 [2019-09-20 13:25:35,253 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:25:35,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:25:35,253 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:25:35,254 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:25:35,254 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:25:35,255 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:25:35,255 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:25:35,255 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:25:35,255 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:25:35,255 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:25:35,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:25:35,256 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:25:35,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:25:35,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:25:35,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:25:35,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:25:35,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:25:35,257 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:25:35,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:25:35,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:25:35,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:25:35,258 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:25:35,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:25:35,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:25:35,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:25:35,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:25:35,259 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:25:35,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:25:35,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:25:35,260 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:25:35,287 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:25:35,299 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:25:35,302 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:25:35,304 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:25:35,304 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:25:35,305 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2019-09-20 13:25:35,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bea987aa7/c24f7bd2131e488586e8151af32df598/FLAGf59841e3c [2019-09-20 13:25:35,768 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:25:35,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2019-09-20 13:25:35,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bea987aa7/c24f7bd2131e488586e8151af32df598/FLAGf59841e3c [2019-09-20 13:25:36,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bea987aa7/c24f7bd2131e488586e8151af32df598 [2019-09-20 13:25:36,194 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:25:36,195 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:25:36,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:36,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:25:36,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:25:36,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:36" (1/1) ... [2019-09-20 13:25:36,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c830a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:36, skipping insertion in model container [2019-09-20 13:25:36,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:36" (1/1) ... [2019-09-20 13:25:36,213 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:25:36,232 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:25:36,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:36,431 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:25:36,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:36,465 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:25:36,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:36 WrapperNode [2019-09-20 13:25:36,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:36,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:25:36,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:25:36,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:25:36,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:36" (1/1) ... [2019-09-20 13:25:36,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:36" (1/1) ... [2019-09-20 13:25:36,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:36" (1/1) ... [2019-09-20 13:25:36,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:36" (1/1) ... [2019-09-20 13:25:36,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:36" (1/1) ... [2019-09-20 13:25:36,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:36" (1/1) ... [2019-09-20 13:25:36,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:36" (1/1) ... [2019-09-20 13:25:36,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:25:36,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:25:36,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:25:36,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:25:36,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:36" (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 [2019-09-20 13:25:36,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:25:36,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:25:36,653 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:25:36,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:25:36,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:25:36,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 13:25:36,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:25:36,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:25:36,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:25:36,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:25:36,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:25:36,938 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:25:36,939 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-20 13:25:36,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:36 BoogieIcfgContainer [2019-09-20 13:25:36,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:25:36,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:25:36,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:25:36,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:25:36,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:25:36" (1/3) ... [2019-09-20 13:25:36,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557d23ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:36, skipping insertion in model container [2019-09-20 13:25:36,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:36" (2/3) ... [2019-09-20 13:25:36,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557d23ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:36, skipping insertion in model container [2019-09-20 13:25:36,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:36" (3/3) ... [2019-09-20 13:25:36,955 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2019-09-20 13:25:36,966 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:25:36,973 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:25:36,990 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:25:37,010 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:25:37,010 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:25:37,010 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:25:37,010 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:25:37,011 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:25:37,011 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:25:37,011 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:25:37,011 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:25:37,026 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2019-09-20 13:25:37,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-20 13:25:37,035 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:37,036 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:37,039 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:37,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:37,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2074932940, now seen corresponding path program 1 times [2019-09-20 13:25:37,049 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:37,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:37,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:37,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:37,091 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:37,148 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:37,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:25:37,149 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:37,153 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:25:37,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:25:37,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:25:37,167 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2019-09-20 13:25:37,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:37,191 INFO L93 Difference]: Finished difference Result 47 states and 69 transitions. [2019-09-20 13:25:37,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:25:37,193 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-09-20 13:25:37,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:37,203 INFO L225 Difference]: With dead ends: 47 [2019-09-20 13:25:37,203 INFO L226 Difference]: Without dead ends: 42 [2019-09-20 13:25:37,205 INFO L636 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 [2019-09-20 13:25:37,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-20 13:25:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-20 13:25:37,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-20 13:25:37,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2019-09-20 13:25:37,272 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 12 [2019-09-20 13:25:37,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:37,273 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2019-09-20 13:25:37,273 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:25:37,274 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2019-09-20 13:25:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-20 13:25:37,276 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:37,277 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:37,278 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:37,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:37,281 INFO L82 PathProgramCache]: Analyzing trace with hash -132543993, now seen corresponding path program 1 times [2019-09-20 13:25:37,281 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:37,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:37,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:37,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:37,288 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:37,463 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:37,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:25:37,463 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:37,467 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:25:37,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:25:37,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:25:37,468 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 5 states. [2019-09-20 13:25:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:37,687 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2019-09-20 13:25:37,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:25:37,688 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-20 13:25:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:37,690 INFO L225 Difference]: With dead ends: 46 [2019-09-20 13:25:37,690 INFO L226 Difference]: Without dead ends: 46 [2019-09-20 13:25:37,691 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:25:37,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-20 13:25:37,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-09-20 13:25:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-20 13:25:37,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2019-09-20 13:25:37,702 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 13 [2019-09-20 13:25:37,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:37,703 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2019-09-20 13:25:37,703 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:25:37,703 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2019-09-20 13:25:37,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-20 13:25:37,704 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:37,705 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:37,705 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:37,706 INFO L82 PathProgramCache]: Analyzing trace with hash -811261734, now seen corresponding path program 1 times [2019-09-20 13:25:37,706 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:37,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:37,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:37,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:37,708 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:37,763 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:37,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:25:37,763 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:37,764 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:25:37,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:25:37,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:25:37,765 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 5 states. [2019-09-20 13:25:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:37,841 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2019-09-20 13:25:37,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:25:37,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-09-20 13:25:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:37,843 INFO L225 Difference]: With dead ends: 50 [2019-09-20 13:25:37,843 INFO L226 Difference]: Without dead ends: 40 [2019-09-20 13:25:37,844 INFO L636 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 [2019-09-20 13:25:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-20 13:25:37,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-09-20 13:25:37,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-20 13:25:37,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2019-09-20 13:25:37,850 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 18 [2019-09-20 13:25:37,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:37,851 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2019-09-20 13:25:37,851 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:25:37,851 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2019-09-20 13:25:37,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-20 13:25:37,852 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:37,852 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:37,853 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:37,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:37,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1679618026, now seen corresponding path program 1 times [2019-09-20 13:25:37,853 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:37,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:37,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:37,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:37,856 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:37,932 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:37,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:25:37,932 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:37,932 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:25:37,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:25:37,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:25:37,933 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 6 states. [2019-09-20 13:25:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:38,042 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2019-09-20 13:25:38,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:25:38,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-09-20 13:25:38,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:38,044 INFO L225 Difference]: With dead ends: 53 [2019-09-20 13:25:38,044 INFO L226 Difference]: Without dead ends: 53 [2019-09-20 13:25:38,044 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:25:38,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-20 13:25:38,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2019-09-20 13:25:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-20 13:25:38,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2019-09-20 13:25:38,053 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 19 [2019-09-20 13:25:38,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:38,053 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2019-09-20 13:25:38,053 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:25:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2019-09-20 13:25:38,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-20 13:25:38,056 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:38,056 INFO L407 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:38,058 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:38,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:38,059 INFO L82 PathProgramCache]: Analyzing trace with hash 2122625936, now seen corresponding path program 1 times [2019-09-20 13:25:38,059 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:38,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:38,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:38,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:38,069 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-09-20 13:25:38,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:38,249 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:25:38,250 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 34 with the following transitions: [2019-09-20 13:25:38,252 INFO L207 CegarAbsIntRunner]: [0], [4], [7], [11], [20], [27], [32], [35], [96], [99], [101], [104], [106], [107], [108], [109], [115], [116], [117], [118] [2019-09-20 13:25:38,295 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:25:38,295 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:25:38,549 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-20 13:25:38,552 INFO L272 AbstractInterpreter]: Visited 20 different actions 133 times. Merged at 6 different actions 36 times. Widened at 1 different actions 2 times. Performed 184 root evaluator evaluations with a maximum evaluation depth of 5. Performed 184 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2019-09-20 13:25:38,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:38,557 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-20 13:25:38,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:38,557 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:25:38,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:38,577 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-20 13:25:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:38,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-20 13:25:38,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:25:38,738 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:25:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-20 13:25:38,777 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:25:38,822 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:25:38,845 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:25:38,846 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:25:38,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:25:38,905 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:25:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-20 13:25:38,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-20 13:25:38,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 17 [2019-09-20 13:25:38,922 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:25:38,922 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-20 13:25:38,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-20 13:25:38,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2019-09-20 13:25:38,923 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 14 states. [2019-09-20 13:25:39,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:39,148 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2019-09-20 13:25:39,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 13:25:39,151 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2019-09-20 13:25:39,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:39,151 INFO L225 Difference]: With dead ends: 49 [2019-09-20 13:25:39,151 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:25:39,152 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2019-09-20 13:25:39,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:25:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:25:39,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:25:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:25:39,153 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2019-09-20 13:25:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:39,154 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:25:39,154 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-20 13:25:39,155 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:25:39,155 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:25:39,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:25:39 BoogieIcfgContainer [2019-09-20 13:25:39,163 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:25:39,168 INFO L168 Benchmark]: Toolchain (without parser) took 2969.99 ms. Allocated memory was 131.6 MB in the beginning and 220.2 MB in the end (delta: 88.6 MB). Free memory was 85.6 MB in the beginning and 107.2 MB in the end (delta: -21.6 MB). Peak memory consumption was 67.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:39,169 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 131.6 MB. Free memory was 104.3 MB in the beginning and 104.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:25:39,170 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.25 ms. Allocated memory is still 131.6 MB. Free memory was 85.4 MB in the beginning and 75.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:39,171 INFO L168 Benchmark]: Boogie Preprocessor took 131.10 ms. Allocated memory was 131.6 MB in the beginning and 198.7 MB in the end (delta: 67.1 MB). Free memory was 75.6 MB in the beginning and 175.0 MB in the end (delta: -99.4 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:39,172 INFO L168 Benchmark]: RCFGBuilder took 346.09 ms. Allocated memory is still 198.7 MB. Free memory was 174.4 MB in the beginning and 158.6 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:39,173 INFO L168 Benchmark]: TraceAbstraction took 2215.56 ms. Allocated memory was 198.7 MB in the beginning and 220.2 MB in the end (delta: 21.5 MB). Free memory was 158.6 MB in the beginning and 107.2 MB in the end (delta: 51.4 MB). Peak memory consumption was 72.9 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:39,177 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 131.6 MB. Free memory was 104.3 MB in the beginning and 104.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 269.25 ms. Allocated memory is still 131.6 MB. Free memory was 85.4 MB in the beginning and 75.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.10 ms. Allocated memory was 131.6 MB in the beginning and 198.7 MB in the end (delta: 67.1 MB). Free memory was 75.6 MB in the beginning and 175.0 MB in the end (delta: -99.4 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 346.09 ms. Allocated memory is still 198.7 MB. Free memory was 174.4 MB in the beginning and 158.6 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2215.56 ms. Allocated memory was 198.7 MB in the beginning and 220.2 MB in the end (delta: 21.5 MB). Free memory was 158.6 MB in the beginning and 107.2 MB in the end (delta: 51.4 MB). Peak memory consumption was 72.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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, 47 locations, 1 error locations. SAFE Result, 2.1s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 245 SDtfs, 85 SDslu, 517 SDs, 0 SdLazy, 266 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 11020 SizeOfPredicates, 4 NumberOfNonLiveVariables, 69 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 46/73 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...