/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_7-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:26:57,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:26:57,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:26:57,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:26:57,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:26:57,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:26:57,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:26:57,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:26:57,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:26:57,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:26:57,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:26:57,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:26:57,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:26:57,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:26:57,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:26:57,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:26:57,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:26:57,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:26:57,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:26:57,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:26:57,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:26:57,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:26:57,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:26:57,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:26:57,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:26:57,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:26:57,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:26:57,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:26:57,288 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 20:26:57,311 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:26:57,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:26:57,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:26:57,318 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:26:57,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:26:57,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:26:57,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:26:57,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:26:57,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:26:57,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:26:57,320 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:26:57,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:26:57,321 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:26:57,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:26:57,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:26:57,322 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:26:57,322 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:26:57,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:26:57,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:26:57,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:26:57,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:26:57,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:26:57,323 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:26:57,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:26:57,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:26:57,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:26:57,783 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:26:57,784 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:26:57,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-2.c [2020-10-23 20:26:57,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d96788e2/cbb9aed28dba4ac19305824abb27f230/FLAGa806ff22e [2020-10-23 20:26:58,572 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:26:58,573 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-2.c [2020-10-23 20:26:58,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d96788e2/cbb9aed28dba4ac19305824abb27f230/FLAGa806ff22e [2020-10-23 20:26:58,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d96788e2/cbb9aed28dba4ac19305824abb27f230 [2020-10-23 20:26:58,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:26:58,959 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:26:58,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:58,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:26:58,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:26:58,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:58" (1/1) ... [2020-10-23 20:26:58,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@345ac4f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:58, skipping insertion in model container [2020-10-23 20:26:58,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:58" (1/1) ... [2020-10-23 20:26:58,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:26:58,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:26:59,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:59,182 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:26:59,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:59,222 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:26:59,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:59 WrapperNode [2020-10-23 20:26:59,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:59,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:26:59,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:26:59,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:26:59,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:59" (1/1) ... [2020-10-23 20:26:59,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:59" (1/1) ... [2020-10-23 20:26:59,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:59" (1/1) ... [2020-10-23 20:26:59,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:59" (1/1) ... [2020-10-23 20:26:59,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:59" (1/1) ... [2020-10-23 20:26:59,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:59" (1/1) ... [2020-10-23 20:26:59,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:59" (1/1) ... [2020-10-23 20:26:59,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:26:59,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:26:59,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:26:59,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:26:59,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:59" (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 20:26:59,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:26:59,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:26:59,367 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:26:59,368 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-10-23 20:26:59,368 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:26:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:26:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:26:59,368 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:26:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:26:59,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:26:59,370 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-10-23 20:26:59,370 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:26:59,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:26:59,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:26:59,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:26:59,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:26:59,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:26:59,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:26:59,661 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:26:59,661 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:26:59,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:59 BoogieIcfgContainer [2020-10-23 20:26:59,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:26:59,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:26:59,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:26:59,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:26:59,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:26:58" (1/3) ... [2020-10-23 20:26:59,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288e9214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:59, skipping insertion in model container [2020-10-23 20:26:59,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:59" (2/3) ... [2020-10-23 20:26:59,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288e9214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:59, skipping insertion in model container [2020-10-23 20:26:59,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:59" (3/3) ... [2020-10-23 20:26:59,673 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_7-2.c [2020-10-23 20:26:59,687 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:26:59,694 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:26:59,716 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:26:59,787 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:26:59,787 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:26:59,787 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:26:59,788 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:26:59,788 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:26:59,788 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:26:59,788 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:26:59,788 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:26:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-23 20:26:59,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 20:26:59,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:59,821 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 20:26:59,821 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:59,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:59,828 INFO L82 PathProgramCache]: Analyzing trace with hash -32329728, now seen corresponding path program 1 times [2020-10-23 20:26:59,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:59,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521318622] [2020-10-23 20:26:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:59,925 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:00,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:00,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:00,390 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 20:27:00,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521318622] [2020-10-23 20:27:00,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:00,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:27:00,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682637294] [2020-10-23 20:27:00,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:27:00,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:00,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:27:00,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:27:00,432 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 6 states. [2020-10-23 20:27:00,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:00,950 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-10-23 20:27:00,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:27:00,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-23 20:27:00,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:00,963 INFO L225 Difference]: With dead ends: 60 [2020-10-23 20:27:00,963 INFO L226 Difference]: Without dead ends: 37 [2020-10-23 20:27:00,967 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 20:27:00,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-23 20:27:01,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-23 20:27:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-23 20:27:01,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-23 20:27:01,025 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 25 [2020-10-23 20:27:01,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:01,026 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-23 20:27:01,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:27:01,026 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-23 20:27:01,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 20:27:01,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:01,029 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 20:27:01,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:27:01,030 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:01,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:01,031 INFO L82 PathProgramCache]: Analyzing trace with hash 950139466, now seen corresponding path program 1 times [2020-10-23 20:27:01,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:01,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331110869] [2020-10-23 20:27:01,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:01,035 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:01,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:01,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:01,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:01,191 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 20:27:01,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331110869] [2020-10-23 20:27:01,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:01,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:27:01,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120099619] [2020-10-23 20:27:01,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:27:01,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:01,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:27:01,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:27:01,196 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 6 states. [2020-10-23 20:27:01,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:01,496 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-10-23 20:27:01,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:27:01,497 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-23 20:27:01,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:01,499 INFO L225 Difference]: With dead ends: 46 [2020-10-23 20:27:01,499 INFO L226 Difference]: Without dead ends: 39 [2020-10-23 20:27:01,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:27:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-23 20:27:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-23 20:27:01,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-23 20:27:01,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-23 20:27:01,515 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 26 [2020-10-23 20:27:01,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:01,515 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-23 20:27:01,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:27:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-23 20:27:01,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 20:27:01,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:01,518 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-23 20:27:01,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:27:01,519 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:01,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:01,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1810718643, now seen corresponding path program 1 times [2020-10-23 20:27:01,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:01,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872016480] [2020-10-23 20:27:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:01,523 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:01,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:01,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:01,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:27:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:01,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 20:27:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 20:27:01,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872016480] [2020-10-23 20:27:01,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:01,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:27:01,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805051145] [2020-10-23 20:27:01,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:27:01,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:01,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:27:01,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:27:01,656 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2020-10-23 20:27:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:01,913 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-10-23 20:27:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:27:01,914 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-23 20:27:01,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:01,916 INFO L225 Difference]: With dead ends: 62 [2020-10-23 20:27:01,916 INFO L226 Difference]: Without dead ends: 39 [2020-10-23 20:27:01,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:27:01,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-23 20:27:01,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-23 20:27:01,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 20:27:01,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-23 20:27:01,930 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 42 [2020-10-23 20:27:01,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:01,931 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-23 20:27:01,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:27:01,931 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-23 20:27:01,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 20:27:01,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:01,933 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-23 20:27:01,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:27:01,934 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:01,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:01,934 INFO L82 PathProgramCache]: Analyzing trace with hash 195045207, now seen corresponding path program 1 times [2020-10-23 20:27:01,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:01,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914689799] [2020-10-23 20:27:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:01,938 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:01,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:02,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:27:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:02,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:27:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:02,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-23 20:27:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-23 20:27:02,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914689799] [2020-10-23 20:27:02,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:02,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:27:02,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422168047] [2020-10-23 20:27:02,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:27:02,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:02,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:27:02,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:27:02,069 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 7 states. [2020-10-23 20:27:02,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:02,393 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2020-10-23 20:27:02,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 20:27:02,394 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-23 20:27:02,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:02,396 INFO L225 Difference]: With dead ends: 66 [2020-10-23 20:27:02,396 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 20:27:02,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:27:02,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 20:27:02,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-23 20:27:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 20:27:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2020-10-23 20:27:02,418 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 43 [2020-10-23 20:27:02,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:02,418 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2020-10-23 20:27:02,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:27:02,419 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2020-10-23 20:27:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-23 20:27:02,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:02,422 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-23 20:27:02,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:27:02,422 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:02,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:02,423 INFO L82 PathProgramCache]: Analyzing trace with hash -396245802, now seen corresponding path program 2 times [2020-10-23 20:27:02,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:02,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119416303] [2020-10-23 20:27:02,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:02,427 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 20:27:02,432 INFO L168 Benchmark]: Toolchain (without parser) took 3476.63 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 102.7 MB in the beginning and 55.5 MB in the end (delta: 47.3 MB). Peak memory consumption was 72.9 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:02,433 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 125.8 MB. Free memory is still 87.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:27:02,433 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.13 ms. Allocated memory is still 125.8 MB. Free memory was 102.0 MB in the beginning and 93.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:02,434 INFO L168 Benchmark]: Boogie Preprocessor took 52.35 ms. Allocated memory is still 125.8 MB. Free memory was 93.0 MB in the beginning and 91.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:02,435 INFO L168 Benchmark]: RCFGBuilder took 384.74 ms. Allocated memory is still 125.8 MB. Free memory was 91.5 MB in the beginning and 78.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:02,436 INFO L168 Benchmark]: TraceAbstraction took 2764.06 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 77.6 MB in the beginning and 55.5 MB in the end (delta: 22.1 MB). Peak memory consumption was 47.8 MB. Max. memory is 8.0 GB. [2020-10-23 20:27:02,441 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 125.8 MB. Free memory is still 87.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 263.13 ms. Allocated memory is still 125.8 MB. Free memory was 102.0 MB in the beginning and 93.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 52.35 ms. Allocated memory is still 125.8 MB. Free memory was 93.0 MB in the beginning and 91.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 384.74 ms. Allocated memory is still 125.8 MB. Free memory was 91.5 MB in the beginning and 78.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2764.06 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 77.6 MB in the beginning and 55.5 MB in the end (delta: 22.1 MB). Peak memory consumption was 47.8 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...