/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/bitvector/s3_clnt_3.BV.c.cil-2a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:25:44,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:25:44,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:25:44,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:25:44,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:25:44,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:25:44,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:25:44,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:25:44,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:25:44,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:25:44,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:25:44,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:25:44,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:25:44,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:25:44,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:25:44,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:25:44,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:25:44,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:25:44,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:25:44,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:25:44,565 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 20:25:44,593 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:25:44,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:25:44,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:25:44,599 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:25:44,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:25:44,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:25:44,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:25:44,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:25:44,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:25:44,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:25:44,601 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:25:44,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:25:44,602 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:25:44,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:25:44,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:25:44,602 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:25:44,602 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:25:44,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:25:44,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:25:44,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:25:44,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:25:44,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:25:44,604 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:25:45,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:25:45,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:25:45,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:25:45,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:25:45,103 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:25:45,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/s3_clnt_3.BV.c.cil-2a.c [2020-10-23 20:25:45,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0045c1e11/f2e91d640262444bb145e3d4479f86d8/FLAG8d4fdfc2d [2020-10-23 20:25:46,022 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:25:46,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/s3_clnt_3.BV.c.cil-2a.c [2020-10-23 20:25:46,040 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0045c1e11/f2e91d640262444bb145e3d4479f86d8/FLAG8d4fdfc2d [2020-10-23 20:25:46,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0045c1e11/f2e91d640262444bb145e3d4479f86d8 [2020-10-23 20:25:46,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:25:46,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:25:46,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:25:46,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:25:46,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:25:46,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:46" (1/1) ... [2020-10-23 20:25:46,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17d3f98d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:46, skipping insertion in model container [2020-10-23 20:25:46,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:25:46" (1/1) ... [2020-10-23 20:25:46,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:25:46,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:25:46,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:25:46,632 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:25:46,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:25:46,707 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:25:46,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:46 WrapperNode [2020-10-23 20:25:46,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:25:46,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:25:46,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:25:46,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:25:46,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:46" (1/1) ... [2020-10-23 20:25:46,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:46" (1/1) ... [2020-10-23 20:25:46,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:46" (1/1) ... [2020-10-23 20:25:46,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:46" (1/1) ... [2020-10-23 20:25:46,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:46" (1/1) ... [2020-10-23 20:25:46,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:46" (1/1) ... [2020-10-23 20:25:46,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:46" (1/1) ... [2020-10-23 20:25:46,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:25:46,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:25:46,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:25:46,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:25:46,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:46" (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 20:25:46,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:25:46,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:25:46,875 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:25:46,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_connect [2020-10-23 20:25:46,875 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:25:46,875 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:25:46,875 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:25:46,875 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:25:46,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:25:46,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:25:46,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 20:25:46,876 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_connect [2020-10-23 20:25:46,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:25:46,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:25:46,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:25:46,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:25:46,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:25:46,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:25:46,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:25:47,218 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-10-23 20:25:47,883 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##87: assume false; [2020-10-23 20:25:47,883 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##88: assume !false; [2020-10-23 20:25:47,904 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:25:47,904 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 20:25:47,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:25:47 BoogieIcfgContainer [2020-10-23 20:25:47,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:25:47,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:25:47,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:25:47,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:25:47,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:25:46" (1/3) ... [2020-10-23 20:25:47,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dfe52a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:25:47, skipping insertion in model container [2020-10-23 20:25:47,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:25:46" (2/3) ... [2020-10-23 20:25:47,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dfe52a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:25:47, skipping insertion in model container [2020-10-23 20:25:47,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:25:47" (3/3) ... [2020-10-23 20:25:47,917 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_3.BV.c.cil-2a.c [2020-10-23 20:25:47,930 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:25:47,936 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:25:47,951 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:25:47,977 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:25:47,977 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:25:47,978 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:25:47,978 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:25:47,978 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:25:47,978 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:25:47,978 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:25:47,978 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:25:48,007 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states. [2020-10-23 20:25:48,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-23 20:25:48,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:48,031 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:25:48,032 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:48,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:48,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1178185491, now seen corresponding path program 1 times [2020-10-23 20:25:48,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:48,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644872156] [2020-10-23 20:25:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:48,161 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:48,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:25:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:48,570 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 20:25:48,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644872156] [2020-10-23 20:25:48,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:25:48,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:25:48,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459755419] [2020-10-23 20:25:48,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:25:48,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:25:48,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:25:48,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:25:48,605 INFO L87 Difference]: Start difference. First operand 362 states. Second operand 4 states. [2020-10-23 20:25:49,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:25:49,711 INFO L93 Difference]: Finished difference Result 590 states and 767 transitions. [2020-10-23 20:25:49,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:25:49,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-10-23 20:25:49,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:25:49,729 INFO L225 Difference]: With dead ends: 590 [2020-10-23 20:25:49,729 INFO L226 Difference]: Without dead ends: 326 [2020-10-23 20:25:49,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:25:49,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-23 20:25:49,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2020-10-23 20:25:49,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-23 20:25:49,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 384 transitions. [2020-10-23 20:25:49,867 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 384 transitions. Word has length 151 [2020-10-23 20:25:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:25:49,870 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 384 transitions. [2020-10-23 20:25:49,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:25:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 384 transitions. [2020-10-23 20:25:49,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-23 20:25:49,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:49,877 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:25:49,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:25:49,880 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:49,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:49,881 INFO L82 PathProgramCache]: Analyzing trace with hash -841787580, now seen corresponding path program 1 times [2020-10-23 20:25:49,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:49,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350633162] [2020-10-23 20:25:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:51,888 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 110 DAG size of output: 104 [2020-10-23 20:25:53,898 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 110 DAG size of output: 104 [2020-10-23 20:25:55,962 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 110 DAG size of output: 104 [2020-10-23 20:25:55,979 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:25:55,982 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:25:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:56,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:25:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:25:56,282 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 20:25:56,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350633162] [2020-10-23 20:25:56,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:25:56,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 20:25:56,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618601438] [2020-10-23 20:25:56,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 20:25:56,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:25:56,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 20:25:56,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 20:25:56,291 INFO L87 Difference]: Start difference. First operand 326 states and 384 transitions. Second operand 4 states. [2020-10-23 20:25:57,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:25:57,368 INFO L93 Difference]: Finished difference Result 544 states and 667 transitions. [2020-10-23 20:25:57,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 20:25:57,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2020-10-23 20:25:57,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:25:57,375 INFO L225 Difference]: With dead ends: 544 [2020-10-23 20:25:57,375 INFO L226 Difference]: Without dead ends: 354 [2020-10-23 20:25:57,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 20:25:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-23 20:25:57,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 344. [2020-10-23 20:25:57,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-23 20:25:57,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 407 transitions. [2020-10-23 20:25:57,500 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 407 transitions. Word has length 169 [2020-10-23 20:25:57,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:25:57,503 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 407 transitions. [2020-10-23 20:25:57,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 20:25:57,503 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 407 transitions. [2020-10-23 20:25:57,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-23 20:25:57,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:25:57,541 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:25:57,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:25:57,541 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:25:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:25:57,543 INFO L82 PathProgramCache]: Analyzing trace with hash 327300708, now seen corresponding path program 1 times [2020-10-23 20:25:57,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:25:57,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026411240] [2020-10-23 20:25:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:25:57,698 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-23 20:26:00,194 WARN L193 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 115 DAG size of output: 106 [2020-10-23 20:26:00,390 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-23 20:26:02,935 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 115 DAG size of output: 109 [2020-10-23 20:26:05,722 WARN L193 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 118 DAG size of output: 109 [2020-10-23 20:26:06,326 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:06,902 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:07,424 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:07,975 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:08,581 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:09,149 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:09,766 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:10,322 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:10,886 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:11,487 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:12,022 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:12,614 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:13,230 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:13,772 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:14,332 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:14,964 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:15,523 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:16,081 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:16,634 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:17,288 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:17,871 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:18,423 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:18,996 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:19,571 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:20,169 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:20,716 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:21,289 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:21,836 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:22,379 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:22,973 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:23,534 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:24,139 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:24,755 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:25,356 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:25,885 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:26,425 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:26,974 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:27,517 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:28,029 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:28,563 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:29,114 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:29,665 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:30,221 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:30,757 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:31,308 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:31,851 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:32,368 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:32,899 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:33,413 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:33,944 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:34,485 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:34,993 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:35,549 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:36,056 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:36,585 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:37,145 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:37,741 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:38,279 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:38,797 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:39,324 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:39,828 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:40,356 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:40,921 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:41,522 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-10-23 20:26:42,081 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:42,620 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:43,204 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:43,735 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:44,273 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:44,811 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:45,345 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 164 [2020-10-23 20:26:45,930 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 163 [2020-10-23 20:26:45,950 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 20:26:45,951 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:26:45,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:26:45,969 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.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:448) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:328) 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 20:26:45,974 INFO L168 Benchmark]: Toolchain (without parser) took 59684.41 ms. Allocated memory was 155.2 MB in the beginning and 324.0 MB in the end (delta: 168.8 MB). Free memory was 131.4 MB in the beginning and 168.9 MB in the end (delta: -37.5 MB). Peak memory consumption was 132.3 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:45,975 INFO L168 Benchmark]: CDTParser took 0.93 ms. Allocated memory is still 155.2 MB. Free memory was 129.6 MB in the beginning and 129.6 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:26:45,976 INFO L168 Benchmark]: CACSL2BoogieTranslator took 411.96 ms. Allocated memory is still 155.2 MB. Free memory was 130.8 MB in the beginning and 116.4 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:45,977 INFO L168 Benchmark]: Boogie Preprocessor took 66.42 ms. Allocated memory is still 155.2 MB. Free memory was 116.4 MB in the beginning and 114.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:45,977 INFO L168 Benchmark]: RCFGBuilder took 1129.21 ms. Allocated memory is still 155.2 MB. Free memory was 114.1 MB in the beginning and 84.0 MB in the end (delta: 30.0 MB). Peak memory consumption was 29.5 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:45,978 INFO L168 Benchmark]: TraceAbstraction took 58063.48 ms. Allocated memory was 155.2 MB in the beginning and 324.0 MB in the end (delta: 168.8 MB). Free memory was 83.5 MB in the beginning and 168.9 MB in the end (delta: -85.4 MB). Peak memory consumption was 83.9 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:45,982 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.93 ms. Allocated memory is still 155.2 MB. Free memory was 129.6 MB in the beginning and 129.6 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 411.96 ms. Allocated memory is still 155.2 MB. Free memory was 130.8 MB in the beginning and 116.4 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.42 ms. Allocated memory is still 155.2 MB. Free memory was 116.4 MB in the beginning and 114.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1129.21 ms. Allocated memory is still 155.2 MB. Free memory was 114.1 MB in the beginning and 84.0 MB in the end (delta: 30.0 MB). Peak memory consumption was 29.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 58063.48 ms. Allocated memory was 155.2 MB in the beginning and 324.0 MB in the end (delta: 168.8 MB). Free memory was 83.5 MB in the beginning and 168.9 MB in the end (delta: -85.4 MB). Peak memory consumption was 83.9 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.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:448) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...