/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/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:26:03,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:26:03,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:26:03,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:26:03,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:26:03,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:26:03,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:26:03,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:26:03,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:26:03,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:26:03,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:26:03,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:26:03,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:26:03,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:26:03,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:26:03,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:26:03,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:26:03,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:26:03,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:26:03,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:26:03,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:26:03,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:26:03,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:26:03,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:26:03,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:26:03,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:26:03,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:26:03,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:26:03,223 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 20:26:03,243 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:26:03,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:26:03,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:26:03,245 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:26:03,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:26:03,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:26:03,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:26:03,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:26:03,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:26:03,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:26:03,247 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:26:03,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:26:03,247 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:26:03,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:26:03,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:26:03,248 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:26:03,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:26:03,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:26:03,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:26:03,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:26:03,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:26:03,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:26:03,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:26:03,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:26:03,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:26:03,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:26:03,680 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:26:03,681 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:26:03,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-10-23 20:26:03,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd6cf319f/9ea1774ce9b7498491fd0209f8db232a/FLAG35acced09 [2020-10-23 20:26:04,454 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:26:04,455 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-10-23 20:26:04,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd6cf319f/9ea1774ce9b7498491fd0209f8db232a/FLAG35acced09 [2020-10-23 20:26:04,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd6cf319f/9ea1774ce9b7498491fd0209f8db232a [2020-10-23 20:26:04,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:26:04,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:26:04,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:04,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:26:04,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:26:04,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:04" (1/1) ... [2020-10-23 20:26:04,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e97308f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:04, skipping insertion in model container [2020-10-23 20:26:04,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:04" (1/1) ... [2020-10-23 20:26:04,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:26:04,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:26:05,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:05,054 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:26:05,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:05,089 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:26:05,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:05 WrapperNode [2020-10-23 20:26:05,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:05,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:26:05,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:26:05,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:26:05,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:05" (1/1) ... [2020-10-23 20:26:05,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:05" (1/1) ... [2020-10-23 20:26:05,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:05" (1/1) ... [2020-10-23 20:26:05,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:05" (1/1) ... [2020-10-23 20:26:05,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:05" (1/1) ... [2020-10-23 20:26:05,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:05" (1/1) ... [2020-10-23 20:26:05,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:05" (1/1) ... [2020-10-23 20:26:05,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:26:05,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:26:05,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:26:05,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:26:05,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:05" (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 20:26:05,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:26:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:26:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:26:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-10-23 20:26:05,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:26:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:26:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:26:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:26:05,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:26:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:26:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-10-23 20:26:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:26:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:26:05,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:26:05,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:26:05,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:26:05,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:26:05,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:26:05,539 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:26:05,540 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:26:05,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:05 BoogieIcfgContainer [2020-10-23 20:26:05,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:26:05,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:26:05,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:26:05,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:26:05,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:26:04" (1/3) ... [2020-10-23 20:26:05,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d751e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:05, skipping insertion in model container [2020-10-23 20:26:05,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:05" (2/3) ... [2020-10-23 20:26:05,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d751e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:05, skipping insertion in model container [2020-10-23 20:26:05,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:05" (3/3) ... [2020-10-23 20:26:05,553 INFO L111 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-10-23 20:26:05,569 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:26:05,576 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:26:05,592 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:26:05,668 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:26:05,668 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:26:05,668 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:26:05,669 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:26:05,669 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:26:05,669 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:26:05,669 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:26:05,669 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:26:05,712 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-23 20:26:05,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-23 20:26:05,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:05,745 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-10-23 20:26:05,746 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:05,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:05,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1097920735, now seen corresponding path program 1 times [2020-10-23 20:26:05,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:05,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204599403] [2020-10-23 20:26:05,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:05,908 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:06,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:06,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 20:26:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:06,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-23 20:26:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 20:26:06,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204599403] [2020-10-23 20:26:06,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:06,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:26:06,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906089607] [2020-10-23 20:26:06,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:26:06,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:06,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:26:06,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:26:06,405 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 7 states. [2020-10-23 20:26:06,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:06,873 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-10-23 20:26:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:26:06,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-23 20:26:06,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:06,886 INFO L225 Difference]: With dead ends: 73 [2020-10-23 20:26:06,886 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 20:26:06,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:26:06,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 20:26:06,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-23 20:26:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 20:26:06,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-23 20:26:06,953 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 38 [2020-10-23 20:26:06,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:06,954 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-23 20:26:06,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:26:06,954 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-23 20:26:06,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-23 20:26:06,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:06,958 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1] [2020-10-23 20:26:06,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:26:06,958 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:06,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:06,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1483482559, now seen corresponding path program 1 times [2020-10-23 20:26:06,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:06,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755843558] [2020-10-23 20:26:06,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:06,963 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 20:26:06,969 INFO L168 Benchmark]: Toolchain (without parser) took 2140.91 ms. Allocated memory is still 151.0 MB. Free memory was 127.3 MB in the beginning and 94.2 MB in the end (delta: 33.2 MB). Peak memory consumption was 34.3 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:06,970 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 125.8 MB. Free memory was 98.0 MB in the beginning and 97.9 MB in the end (delta: 68.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:26:06,972 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.31 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:06,973 INFO L168 Benchmark]: Boogie Preprocessor took 37.99 ms. Allocated memory is still 151.0 MB. Free memory was 117.7 MB in the beginning and 116.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:06,974 INFO L168 Benchmark]: RCFGBuilder took 412.30 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 128.9 MB in the end (delta: -12.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:06,975 INFO L168 Benchmark]: TraceAbstraction took 1422.45 ms. Allocated memory is still 151.0 MB. Free memory was 128.6 MB in the beginning and 94.2 MB in the end (delta: 34.4 MB). Peak memory consumption was 35.3 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:06,980 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 125.8 MB. Free memory was 98.0 MB in the beginning and 97.9 MB in the end (delta: 68.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.31 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 117.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.99 ms. Allocated memory is still 151.0 MB. Free memory was 117.7 MB in the beginning and 116.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 412.30 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 128.9 MB in the end (delta: -12.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1422.45 ms. Allocated memory is still 151.0 MB. Free memory was 128.6 MB in the beginning and 94.2 MB in the end (delta: 34.4 MB). Peak memory consumption was 35.3 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...