/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/Fibonacci03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:26:07,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:26:07,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:26:07,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:26:07,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:26:07,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:26:07,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:26:07,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:26:07,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:26:07,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:26:07,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:26:07,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:26:07,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:26:07,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:26:07,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:26:07,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:26:07,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:26:07,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:26:07,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:26:07,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:26:07,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:26:07,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:26:07,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:26:07,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:26:07,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:26:07,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:26:07,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:26:07,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:26:07,743 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 20:26:07,766 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:26:07,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:26:07,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:26:07,771 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:26:07,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:26:07,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:26:07,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:26:07,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:26:07,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:26:07,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:26:07,773 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:26:07,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:26:07,774 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:26:07,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:26:07,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:26:07,775 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:26:07,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:26:07,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:26:07,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:26:07,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:26:07,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:26:07,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:26:07,776 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:26:08,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:26:08,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:26:08,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:26:08,199 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:26:08,200 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:26:08,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci03.c [2020-10-23 20:26:08,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/454a8580f/95770eafb90c492389395c89ed69ff54/FLAG15127b8ab [2020-10-23 20:26:08,927 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:26:08,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci03.c [2020-10-23 20:26:08,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/454a8580f/95770eafb90c492389395c89ed69ff54/FLAG15127b8ab [2020-10-23 20:26:09,294 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/454a8580f/95770eafb90c492389395c89ed69ff54 [2020-10-23 20:26:09,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:26:09,306 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:26:09,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:09,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:26:09,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:26:09,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:09" (1/1) ... [2020-10-23 20:26:09,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a9638e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:09, skipping insertion in model container [2020-10-23 20:26:09,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:09" (1/1) ... [2020-10-23 20:26:09,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:26:09,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:26:09,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:09,552 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:26:09,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:09,587 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:26:09,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:09 WrapperNode [2020-10-23 20:26:09,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:09,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:26:09,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:26:09,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:26:09,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:09" (1/1) ... [2020-10-23 20:26:09,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:09" (1/1) ... [2020-10-23 20:26:09,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:09" (1/1) ... [2020-10-23 20:26:09,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:09" (1/1) ... [2020-10-23 20:26:09,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:09" (1/1) ... [2020-10-23 20:26:09,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:09" (1/1) ... [2020-10-23 20:26:09,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:09" (1/1) ... [2020-10-23 20:26:09,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:26:09,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:26:09,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:26:09,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:26:09,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:09" (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 20:26:09,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:26:09,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:26:09,714 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:26:09,715 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-10-23 20:26:09,715 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:26:09,715 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:26:09,715 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:26:09,715 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:26:09,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:26:09,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:26:09,716 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-10-23 20:26:09,716 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:26:09,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:26:09,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:26:09,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:26:09,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:26:09,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:26:09,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:26:10,152 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:26:10,155 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:26:10,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:10 BoogieIcfgContainer [2020-10-23 20:26:10,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:26:10,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:26:10,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:26:10,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:26:10,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:26:09" (1/3) ... [2020-10-23 20:26:10,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b314d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:10, skipping insertion in model container [2020-10-23 20:26:10,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:09" (2/3) ... [2020-10-23 20:26:10,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b314d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:10, skipping insertion in model container [2020-10-23 20:26:10,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:10" (3/3) ... [2020-10-23 20:26:10,197 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci03.c [2020-10-23 20:26:10,218 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:26:10,224 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:26:10,240 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:26:10,278 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:26:10,280 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:26:10,280 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:26:10,280 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:26:10,281 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:26:10,281 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:26:10,281 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:26:10,281 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:26:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-23 20:26:10,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 20:26:10,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:10,321 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, 1, 1] [2020-10-23 20:26:10,321 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:10,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:10,333 INFO L82 PathProgramCache]: Analyzing trace with hash 274389233, now seen corresponding path program 1 times [2020-10-23 20:26:10,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:10,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967435390] [2020-10-23 20:26:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:10,434 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:10,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:10,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:10,914 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 20:26:10,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967435390] [2020-10-23 20:26:10,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:10,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:26:10,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943499040] [2020-10-23 20:26:10,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:26:10,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:10,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:26:10,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:26:10,941 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 6 states. [2020-10-23 20:26:11,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:11,322 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-10-23 20:26:11,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 20:26:11,325 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-23 20:26:11,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:11,335 INFO L225 Difference]: With dead ends: 63 [2020-10-23 20:26:11,336 INFO L226 Difference]: Without dead ends: 40 [2020-10-23 20:26:11,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:26:11,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-23 20:26:11,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-23 20:26:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 20:26:11,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-23 20:26:11,399 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 28 [2020-10-23 20:26:11,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:11,399 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-23 20:26:11,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:26:11,400 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-23 20:26:11,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 20:26:11,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:11,402 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, 1, 1, 1] [2020-10-23 20:26:11,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:26:11,403 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:11,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:11,404 INFO L82 PathProgramCache]: Analyzing trace with hash -393682023, now seen corresponding path program 1 times [2020-10-23 20:26:11,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:11,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021472928] [2020-10-23 20:26:11,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:11,407 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:11,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:11,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:11,524 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 20:26:11,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021472928] [2020-10-23 20:26:11,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:11,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:26:11,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034757050] [2020-10-23 20:26:11,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:26:11,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:11,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:26:11,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:26:11,528 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2020-10-23 20:26:11,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:11,799 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-23 20:26:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 20:26:11,800 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-23 20:26:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:11,802 INFO L225 Difference]: With dead ends: 49 [2020-10-23 20:26:11,802 INFO L226 Difference]: Without dead ends: 42 [2020-10-23 20:26:11,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:26:11,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-23 20:26:11,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-23 20:26:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 20:26:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-23 20:26:11,821 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 29 [2020-10-23 20:26:11,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:11,821 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-23 20:26:11,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:26:11,822 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-23 20:26:11,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 20:26:11,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:11,824 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, 1, 1, 1] [2020-10-23 20:26:11,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:26:11,825 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:11,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:11,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1206167652, now seen corresponding path program 1 times [2020-10-23 20:26:11,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:11,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326566319] [2020-10-23 20:26:11,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:11,829 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:11,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:11,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:11,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:26:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:11,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 20:26:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:11,970 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 20:26:11,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326566319] [2020-10-23 20:26:11,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:11,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:26:11,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562575547] [2020-10-23 20:26:11,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:26:11,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:11,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:26:11,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:26:11,973 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 7 states. [2020-10-23 20:26:12,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:12,239 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-10-23 20:26:12,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:26:12,240 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-10-23 20:26:12,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:12,241 INFO L225 Difference]: With dead ends: 65 [2020-10-23 20:26:12,242 INFO L226 Difference]: Without dead ends: 42 [2020-10-23 20:26:12,243 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 20:26:12,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-23 20:26:12,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-23 20:26:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-23 20:26:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-23 20:26:12,257 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 45 [2020-10-23 20:26:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:12,258 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-23 20:26:12,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:26:12,258 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-23 20:26:12,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-23 20:26:12,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:12,260 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, 1, 1, 1] [2020-10-23 20:26:12,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:26:12,260 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:12,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:12,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1636516106, now seen corresponding path program 1 times [2020-10-23 20:26:12,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:12,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689484596] [2020-10-23 20:26:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:12,264 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:12,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:12,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:12,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:26:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:12,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-23 20:26:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:12,400 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 20:26:12,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689484596] [2020-10-23 20:26:12,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:12,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:26:12,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684114557] [2020-10-23 20:26:12,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:26:12,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:12,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:26:12,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:26:12,403 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 7 states. [2020-10-23 20:26:12,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:12,796 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2020-10-23 20:26:12,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 20:26:12,797 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-10-23 20:26:12,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:12,799 INFO L225 Difference]: With dead ends: 69 [2020-10-23 20:26:12,799 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 20:26:12,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:26:12,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 20:26:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-23 20:26:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-23 20:26:12,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2020-10-23 20:26:12,821 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 46 [2020-10-23 20:26:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:12,821 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2020-10-23 20:26:12,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:26:12,821 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2020-10-23 20:26:12,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-23 20:26:12,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:12,825 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, 1, 1, 1] [2020-10-23 20:26:12,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:26:12,825 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:12,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1280637961, now seen corresponding path program 2 times [2020-10-23 20:26:12,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:12,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599274633] [2020-10-23 20:26:12,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:12,829 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 20:26:12,839 INFO L168 Benchmark]: Toolchain (without parser) took 3533.74 ms. Allocated memory was 151.0 MB in the beginning and 196.1 MB in the end (delta: 45.1 MB). Free memory was 128.5 MB in the beginning and 144.4 MB in the end (delta: -15.9 MB). Peak memory consumption was 30.2 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:12,842 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 124.7 MB in the end (delta: 237.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:26:12,844 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.24 ms. Allocated memory is still 151.0 MB. Free memory was 127.8 MB in the beginning and 118.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:12,845 INFO L168 Benchmark]: Boogie Preprocessor took 34.28 ms. Allocated memory is still 151.0 MB. Free memory was 118.5 MB in the beginning and 117.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:12,848 INFO L168 Benchmark]: RCFGBuilder took 532.94 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 134.6 MB in the end (delta: -17.4 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:12,851 INFO L168 Benchmark]: TraceAbstraction took 2673.17 ms. Allocated memory was 151.0 MB in the beginning and 196.1 MB in the end (delta: 45.1 MB). Free memory was 134.2 MB in the beginning and 144.4 MB in the end (delta: -10.2 MB). Peak memory consumption was 35.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:12,854 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 124.7 MB in the end (delta: 237.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 276.24 ms. Allocated memory is still 151.0 MB. Free memory was 127.8 MB in the beginning and 118.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.28 ms. Allocated memory is still 151.0 MB. Free memory was 118.5 MB in the beginning and 117.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 532.94 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 134.6 MB in the end (delta: -17.4 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2673.17 ms. Allocated memory was 151.0 MB in the beginning and 196.1 MB in the end (delta: 45.1 MB). Free memory was 134.2 MB in the beginning and 144.4 MB in the end (delta: -10.2 MB). Peak memory consumption was 35.1 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...