/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:26:33,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:26:33,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:26:33,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:26:33,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:26:33,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:26:33,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:26:33,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:26:33,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:26:33,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:26:33,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:26:33,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:26:33,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:26:33,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:26:33,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:26:33,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:26:33,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:26:33,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:26:33,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:26:33,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:26:33,256 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:26:33,269 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:26:33,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:26:33,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:26:33,271 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:26:33,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:26:33,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:26:33,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:26:33,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:26:33,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:26:33,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:26:33,273 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:26:33,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:26:33,273 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:26:33,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:26:33,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:26:33,274 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:26:33,274 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:26:33,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:26:33,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:26:33,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:26:33,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:26:33,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:26:33,276 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:26:33,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:26:33,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:26:33,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:26:33,683 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:26:33,684 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:26:33,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c [2020-10-23 20:26:33,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5647879c4/12c3c536569048879959ce69229fd271/FLAG02f66760a [2020-10-23 20:26:34,457 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:26:34,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c [2020-10-23 20:26:34,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5647879c4/12c3c536569048879959ce69229fd271/FLAG02f66760a [2020-10-23 20:26:34,825 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5647879c4/12c3c536569048879959ce69229fd271 [2020-10-23 20:26:34,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:26:34,837 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:26:34,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:34,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:26:34,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:26:34,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:34" (1/1) ... [2020-10-23 20:26:34,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64976afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:34, skipping insertion in model container [2020-10-23 20:26:34,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:34" (1/1) ... [2020-10-23 20:26:34,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:26:34,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:26:35,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:35,110 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:26:35,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:35,146 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:26:35,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:35 WrapperNode [2020-10-23 20:26:35,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:35,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:26:35,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:26:35,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:26:35,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:35" (1/1) ... [2020-10-23 20:26:35,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:35" (1/1) ... [2020-10-23 20:26:35,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:35" (1/1) ... [2020-10-23 20:26:35,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:35" (1/1) ... [2020-10-23 20:26:35,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:35" (1/1) ... [2020-10-23 20:26:35,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:35" (1/1) ... [2020-10-23 20:26:35,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:35" (1/1) ... [2020-10-23 20:26:35,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:26:35,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:26:35,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:26:35,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:26:35,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:35" (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 [2020-10-23 20:26:35,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:26:35,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:26:35,266 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:26:35,267 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-10-23 20:26:35,267 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-10-23 20:26:35,267 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:26:35,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:26:35,267 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:26:35,268 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:26:35,268 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:26:35,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:26:35,269 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-10-23 20:26:35,269 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-10-23 20:26:35,269 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:26:35,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:26:35,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:26:35,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:26:35,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:26:35,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:26:35,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:26:35,818 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:26:35,819 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:26:35,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:35 BoogieIcfgContainer [2020-10-23 20:26:35,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:26:35,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:26:35,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:26:35,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:26:35,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:26:34" (1/3) ... [2020-10-23 20:26:35,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c9a339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:35, skipping insertion in model container [2020-10-23 20:26:35,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:35" (2/3) ... [2020-10-23 20:26:35,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c9a339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:35, skipping insertion in model container [2020-10-23 20:26:35,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:35" (3/3) ... [2020-10-23 20:26:35,848 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_10-2.c [2020-10-23 20:26:35,861 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:26:35,871 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:26:35,887 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:26:35,909 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:26:35,910 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:26:35,910 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:26:35,910 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:26:35,910 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:26:35,910 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:26:35,910 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:26:35,910 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:26:35,926 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-10-23 20:26:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 20:26:35,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:35,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:35,937 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:35,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:35,944 INFO L82 PathProgramCache]: Analyzing trace with hash 775886402, now seen corresponding path program 1 times [2020-10-23 20:26:35,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:35,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339092823] [2020-10-23 20:26:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:36,031 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:36,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:36,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:26:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:26:36,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339092823] [2020-10-23 20:26:36,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:36,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:26:36,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759669680] [2020-10-23 20:26:36,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:26:36,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:36,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:26:36,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:26:36,349 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 6 states. [2020-10-23 20:26:37,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:37,084 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-23 20:26:37,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:26:37,086 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-23 20:26:37,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:37,098 INFO L225 Difference]: With dead ends: 74 [2020-10-23 20:26:37,098 INFO L226 Difference]: Without dead ends: 51 [2020-10-23 20:26:37,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:26:37,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-23 20:26:37,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-23 20:26:37,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-23 20:26:37,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-23 20:26:37,181 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 25 [2020-10-23 20:26:37,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:37,182 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-23 20:26:37,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:26:37,182 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-23 20:26:37,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 20:26:37,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:37,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:37,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:26:37,195 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:37,196 INFO L82 PathProgramCache]: Analyzing trace with hash 478831265, now seen corresponding path program 1 times [2020-10-23 20:26:37,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:37,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782642042] [2020-10-23 20:26:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:37,201 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:37,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:37,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:26:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:26:37,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782642042] [2020-10-23 20:26:37,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:37,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:26:37,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585842402] [2020-10-23 20:26:37,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:26:37,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:37,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:26:37,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:26:37,410 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 6 states. [2020-10-23 20:26:38,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:38,055 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-23 20:26:38,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:26:38,057 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-23 20:26:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:38,059 INFO L225 Difference]: With dead ends: 60 [2020-10-23 20:26:38,059 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 20:26:38,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:26:38,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 20:26:38,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-10-23 20:26:38,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-23 20:26:38,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-23 20:26:38,082 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 26 [2020-10-23 20:26:38,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:38,082 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-23 20:26:38,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:26:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-23 20:26:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 20:26:38,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:38,085 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:38,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:26:38,086 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:38,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:38,087 INFO L82 PathProgramCache]: Analyzing trace with hash -708858972, now seen corresponding path program 1 times [2020-10-23 20:26:38,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:38,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373641532] [2020-10-23 20:26:38,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:38,091 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:38,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:38,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:26:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:38,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:26:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:38,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 20:26:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 20:26:38,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373641532] [2020-10-23 20:26:38,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:38,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:26:38,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360386114] [2020-10-23 20:26:38,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:26:38,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:38,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:26:38,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:26:38,305 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 7 states. [2020-10-23 20:26:38,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:38,947 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-10-23 20:26:38,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:26:38,951 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-23 20:26:38,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:38,953 INFO L225 Difference]: With dead ends: 92 [2020-10-23 20:26:38,953 INFO L226 Difference]: Without dead ends: 55 [2020-10-23 20:26:38,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:26:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-23 20:26:38,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-23 20:26:38,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 20:26:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-23 20:26:38,975 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 42 [2020-10-23 20:26:38,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:38,976 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-23 20:26:38,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:26:38,976 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-23 20:26:38,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 20:26:38,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:38,978 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:38,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:26:38,979 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:38,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:38,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1629720462, now seen corresponding path program 1 times [2020-10-23 20:26:38,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:38,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506854361] [2020-10-23 20:26:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:38,984 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:39,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:39,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:26:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:39,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:26:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:39,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-23 20:26:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 20:26:39,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506854361] [2020-10-23 20:26:39,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:39,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:26:39,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271447555] [2020-10-23 20:26:39,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:26:39,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:39,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:26:39,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:26:39,239 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 8 states. [2020-10-23 20:26:40,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:40,354 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2020-10-23 20:26:40,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:26:40,356 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-23 20:26:40,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:40,358 INFO L225 Difference]: With dead ends: 84 [2020-10-23 20:26:40,359 INFO L226 Difference]: Without dead ends: 77 [2020-10-23 20:26:40,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:26:40,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-23 20:26:40,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2020-10-23 20:26:40,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-23 20:26:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-10-23 20:26:40,400 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 43 [2020-10-23 20:26:40,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:40,400 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-10-23 20:26:40,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:26:40,401 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-10-23 20:26:40,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-23 20:26:40,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:40,404 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:40,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:26:40,405 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:40,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:40,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1688308117, now seen corresponding path program 1 times [2020-10-23 20:26:40,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:40,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415576326] [2020-10-23 20:26:40,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:40,488 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.looppreprocessor.LoopPreprocessorFastUPR.preProcessLoop(LoopPreprocessorFastUPR.java:119) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:266) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:147) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-23 20:26:40,493 INFO L168 Benchmark]: Toolchain (without parser) took 5661.30 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.9 MB in the beginning and 138.7 MB in the end (delta: -10.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:40,494 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory is still 104.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:26:40,495 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.86 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 117.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:40,496 INFO L168 Benchmark]: Boogie Preprocessor took 34.08 ms. Allocated memory is still 151.0 MB. Free memory was 117.8 MB in the beginning and 116.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:40,497 INFO L168 Benchmark]: RCFGBuilder took 637.70 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 101.3 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:40,498 INFO L168 Benchmark]: TraceAbstraction took 4652.10 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 134.8 MB in the beginning and 138.7 MB in the end (delta: -3.9 MB). Peak memory consumption was 26.7 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:40,502 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory is still 104.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 302.86 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 117.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.08 ms. Allocated memory is still 151.0 MB. Free memory was 117.8 MB in the beginning and 116.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 637.70 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 101.3 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4652.10 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 134.8 MB in the beginning and 138.7 MB in the end (delta: -3.9 MB). Peak memory consumption was 26.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.looppreprocessor.LoopPreprocessorFastUPR.preProcessLoop(LoopPreprocessorFastUPR.java:119) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...