java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:04:38,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:04:38,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:04:38,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:04:38,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:04:38,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:04:38,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:04:38,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:04:38,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:04:38,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:04:38,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:04:38,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:04:38,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:04:38,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:04:38,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:04:38,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:04:38,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:04:38,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:04:38,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:04:38,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:04:38,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:04:38,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:04:38,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:04:38,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:04:38,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:04:38,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:04:38,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:04:38,237 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:04:38,238 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:04:38,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:04:38,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:04:38,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:04:38,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:04:38,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:04:38,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:04:38,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:04:38,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:04:38,256 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:04:38,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:04:38,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:04:38,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:04:38,258 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:04:38,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:04:38,259 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:04:38,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:04:38,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:04:38,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:04:38,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:04:38,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:04:38,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:04:38,260 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:04:38,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:04:38,260 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:04:38,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:04:38,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:04:38,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:04:38,261 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:04:38,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:04:38,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:04:38,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:04:38,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:04:38,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:04:38,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:04:38,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:04:38,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:04:38,263 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:04:38,537 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:04:38,551 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:04:38,555 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:04:38,556 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:04:38,557 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:04:38,558 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2019-10-15 01:04:38,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89649e160/e6f3c4ac2cf24d419ab162a2106a1cad/FLAG413f3219a [2019-10-15 01:04:39,100 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:04:39,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2019-10-15 01:04:39,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89649e160/e6f3c4ac2cf24d419ab162a2106a1cad/FLAG413f3219a [2019-10-15 01:04:39,531 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89649e160/e6f3c4ac2cf24d419ab162a2106a1cad [2019-10-15 01:04:39,541 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:04:39,543 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:04:39,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:04:39,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:04:39,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:04:39,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36c8f889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39, skipping insertion in model container [2019-10-15 01:04:39,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,558 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:04:39,572 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:04:39,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:04:39,772 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:04:39,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:04:39,796 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:04:39,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39 WrapperNode [2019-10-15 01:04:39,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:04:39,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:04:39,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:04:39,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:04:39,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:04:39,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:04:39,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:04:39,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:04:39,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:04:39,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:04:39,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:04:39,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:04:39,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:04:39,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:04:39,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:04:39,963 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:04:39,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:04:39,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:04:40,126 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:04:40,126 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:04:40,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:04:40 BoogieIcfgContainer [2019-10-15 01:04:40,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:04:40,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:04:40,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:04:40,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:04:40,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:04:39" (1/3) ... [2019-10-15 01:04:40,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1899c2bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:04:40, skipping insertion in model container [2019-10-15 01:04:40,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (2/3) ... [2019-10-15 01:04:40,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1899c2bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:04:40, skipping insertion in model container [2019-10-15 01:04:40,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:04:40" (3/3) ... [2019-10-15 01:04:40,135 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2019-10-15 01:04:40,144 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:04:40,149 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:04:40,160 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:04:40,183 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:04:40,184 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:04:40,184 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:04:40,184 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:04:40,184 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:04:40,184 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:04:40,185 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:04:40,185 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:04:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-10-15 01:04:40,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:04:40,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:40,205 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:40,207 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:40,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:40,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2019-10-15 01:04:40,219 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:40,219 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404498691] [2019-10-15 01:04:40,219 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:40,219 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:40,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:40,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404498691] [2019-10-15 01:04:40,456 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:04:40,456 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:04:40,457 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349580620] [2019-10-15 01:04:40,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:04:40,463 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:04:40,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:04:40,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:04:40,485 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2019-10-15 01:04:40,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:04:40,578 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-10-15 01:04:40,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:04:40,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-15 01:04:40,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:04:40,588 INFO L225 Difference]: With dead ends: 29 [2019-10-15 01:04:40,588 INFO L226 Difference]: Without dead ends: 12 [2019-10-15 01:04:40,592 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:04:40,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-15 01:04:40,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-15 01:04:40,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-15 01:04:40,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-15 01:04:40,644 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-15 01:04:40,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:04:40,645 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-15 01:04:40,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:04:40,645 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-15 01:04:40,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:04:40,646 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:40,646 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:40,647 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:40,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:40,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2019-10-15 01:04:40,648 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:40,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234186036] [2019-10-15 01:04:40,648 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:40,649 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:40,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:40,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234186036] [2019-10-15 01:04:40,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106197780] [2019-10-15 01:04:40,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:04:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:40,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:04:40,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:04:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:40,868 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:04:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:40,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [237852039] [2019-10-15 01:04:40,926 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 12 [2019-10-15 01:04:40,959 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:04:40,959 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:04:41,017 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-15 01:04:41,085 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:04:41,088 INFO L272 AbstractInterpreter]: Visited 11 different actions 41 times. Merged at 2 different actions 10 times. Widened at 1 different actions 3 times. Performed 74 root evaluator evaluations with a maximum evaluation depth of 6. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2019-10-15 01:04:41,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:41,093 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:04:41,093 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:04:41,094 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 6] total 9 [2019-10-15 01:04:41,094 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103315711] [2019-10-15 01:04:41,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:04:41,096 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:04:41,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:04:41,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:04:41,097 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2019-10-15 01:04:41,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:04:41,186 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-10-15 01:04:41,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:04:41,187 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2019-10-15 01:04:41,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:04:41,188 INFO L225 Difference]: With dead ends: 23 [2019-10-15 01:04:41,188 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 01:04:41,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:04:41,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 01:04:41,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 01:04:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 01:04:41,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-15 01:04:41,199 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2019-10-15 01:04:41,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:04:41,200 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-15 01:04:41,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:04:41,201 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-15 01:04:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:04:41,202 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:41,202 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:41,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:04:41,406 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:41,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:41,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 2 times [2019-10-15 01:04:41,407 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:41,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315929979] [2019-10-15 01:04:41,408 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:41,408 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:41,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:41,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315929979] [2019-10-15 01:04:41,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489891374] [2019-10-15 01:04:41,591 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:04:41,633 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:04:41,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:04:41,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-15 01:04:41,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:04:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:41,693 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:04:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:41,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1575911764] [2019-10-15 01:04:41,821 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-15 01:04:41,822 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-15 01:04:41,822 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:04:41,822 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 15 [2019-10-15 01:04:41,822 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692830927] [2019-10-15 01:04:41,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-15 01:04:41,823 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:04:41,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-15 01:04:41,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:04:41,824 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2019-10-15 01:04:42,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:04:42,356 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-10-15 01:04:42,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:04:42,357 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2019-10-15 01:04:42,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:04:42,358 INFO L225 Difference]: With dead ends: 29 [2019-10-15 01:04:42,359 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:04:42,361 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:04:42,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:04:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 01:04:42,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:04:42,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-10-15 01:04:42,372 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2019-10-15 01:04:42,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:04:42,372 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-15 01:04:42,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-15 01:04:42,373 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-10-15 01:04:42,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:04:42,374 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:42,375 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:42,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:04:42,579 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:42,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:42,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 3 times [2019-10-15 01:04:42,579 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:42,580 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806060201] [2019-10-15 01:04:42,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:42,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:42,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 01:04:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 01:04:42,636 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-15 01:04:42,637 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-15 01:04:42,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:04:42 BoogieIcfgContainer [2019-10-15 01:04:42,664 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 01:04:42,668 INFO L168 Benchmark]: Toolchain (without parser) took 3123.40 ms. Allocated memory was 138.4 MB in the beginning and 235.4 MB in the end (delta: 97.0 MB). Free memory was 103.7 MB in the beginning and 152.1 MB in the end (delta: -48.4 MB). Peak memory consumption was 48.6 MB. Max. memory is 7.1 GB. [2019-10-15 01:04:42,670 INFO L168 Benchmark]: CDTParser took 1.18 ms. Allocated memory is still 138.4 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-10-15 01:04:42,673 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.17 ms. Allocated memory is still 138.4 MB. Free memory was 103.5 MB in the beginning and 93.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-10-15 01:04:42,674 INFO L168 Benchmark]: Boogie Preprocessor took 113.83 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 93.9 MB in the beginning and 181.1 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2019-10-15 01:04:42,676 INFO L168 Benchmark]: RCFGBuilder took 216.48 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 170.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2019-10-15 01:04:42,682 INFO L168 Benchmark]: TraceAbstraction took 2535.66 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 170.0 MB in the beginning and 152.1 MB in the end (delta: 17.8 MB). Peak memory consumption was 50.9 MB. Max. memory is 7.1 GB. [2019-10-15 01:04:42,694 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.18 ms. Allocated memory is still 138.4 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.17 ms. Allocated memory is still 138.4 MB. Free memory was 103.5 MB in the beginning and 93.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.83 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 93.9 MB in the beginning and 181.1 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 216.48 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 170.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2535.66 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 170.0 MB in the beginning and 152.1 MB in the end (delta: 17.8 MB). Peak memory consumption was 50.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int x = 0; [L12] unsigned int y = 1; VAL [x=0, y=1] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=1, y=2] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=2, y=4] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=3, y=8] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=4, y=16] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=5, y=32] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=6, y=64] [L14] COND FALSE !(x < 6) VAL [x=6, y=64] [L19] CALL __VERIFIER_assert(x != 6) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Result: UNSAFE, OverallTime: 2.4s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 32 SDtfs, 13 SDslu, 145 SDs, 0 SdLazy, 123 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 76 NumberOfCodeBlocks, 76 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 3048 SizeOfPredicates, 0 NumberOfNonLiveVariables, 73 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...