/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:26:42,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:26:42,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:26:42,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:26:42,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:26:42,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:26:42,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:26:42,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:26:42,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:26:42,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:26:42,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:26:42,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:26:42,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:26:42,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:26:42,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:26:42,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:26:42,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:26:42,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:26:42,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:26:42,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:26:42,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:26:42,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:26:42,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:26:42,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:26:42,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 20:26:42,517 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 20:26:42,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 20:26:42,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 20:26:42,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 20:26:42,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 20:26:42,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 20:26:42,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 20:26:42,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 20:26:42,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 20:26:42,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 20:26:42,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 20:26:42,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 20:26:42,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 20:26:42,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:26:42,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:26:42,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:26:42,529 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 20:26:42,541 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:26:42,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:26:42,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:26:42,543 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:26:42,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:26:42,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:26:42,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:26:42,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:26:42,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:26:42,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:26:42,544 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:26:42,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:26:42,545 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:26:42,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:26:42,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:26:42,545 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:26:42,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:26:42,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:26:42,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:26:42,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:26:42,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:26:42,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:26:42,547 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:26:42,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:26:42,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:26:42,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:26:42,994 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:26:42,995 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:26:42,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_25-1.c [2020-10-23 20:26:43,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/741aaa056/dcabc1135cab4cbfa0d3a7f21f3844b0/FLAG7e829529c [2020-10-23 20:26:43,799 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:26:43,800 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_25-1.c [2020-10-23 20:26:43,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/741aaa056/dcabc1135cab4cbfa0d3a7f21f3844b0/FLAG7e829529c [2020-10-23 20:26:44,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/741aaa056/dcabc1135cab4cbfa0d3a7f21f3844b0 [2020-10-23 20:26:44,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:26:44,183 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:26:44,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:44,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:26:44,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:26:44,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:44" (1/1) ... [2020-10-23 20:26:44,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1290a604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:44, skipping insertion in model container [2020-10-23 20:26:44,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:44" (1/1) ... [2020-10-23 20:26:44,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:26:44,225 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:26:44,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:44,399 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:26:44,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:44,437 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:26:44,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:44 WrapperNode [2020-10-23 20:26:44,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:44,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:26:44,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:26:44,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:26:44,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:44" (1/1) ... [2020-10-23 20:26:44,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:44" (1/1) ... [2020-10-23 20:26:44,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:44" (1/1) ... [2020-10-23 20:26:44,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:44" (1/1) ... [2020-10-23 20:26:44,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:44" (1/1) ... [2020-10-23 20:26:44,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:44" (1/1) ... [2020-10-23 20:26:44,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:44" (1/1) ... [2020-10-23 20:26:44,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:26:44,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:26:44,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:26:44,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:26:44,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:44" (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 20:26:44,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:26:44,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:26:44,573 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:26:44,573 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-10-23 20:26:44,574 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-10-23 20:26:44,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:26:44,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:26:44,574 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:26:44,574 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:26:44,575 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:26:44,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:26:44,575 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-10-23 20:26:44,576 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-10-23 20:26:44,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:26:44,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:26:44,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:26:44,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:26:44,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:26:44,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:26:44,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:26:45,185 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:26:45,185 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:26:45,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:45 BoogieIcfgContainer [2020-10-23 20:26:45,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:26:45,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:26:45,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:26:45,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:26:45,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:26:44" (1/3) ... [2020-10-23 20:26:45,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ee2370 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:45, skipping insertion in model container [2020-10-23 20:26:45,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:44" (2/3) ... [2020-10-23 20:26:45,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ee2370 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:45, skipping insertion in model container [2020-10-23 20:26:45,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:45" (3/3) ... [2020-10-23 20:26:45,205 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_25-1.c [2020-10-23 20:26:45,219 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:26:45,227 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:26:45,245 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:26:45,283 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:26:45,283 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:26:45,283 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:26:45,283 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:26:45,284 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:26:45,284 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:26:45,284 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:26:45,284 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:26:45,306 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-10-23 20:26:45,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 20:26:45,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:45,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:45,324 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:45,336 INFO L82 PathProgramCache]: Analyzing trace with hash 775886402, now seen corresponding path program 1 times [2020-10-23 20:26:45,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:45,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421259616] [2020-10-23 20:26:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:45,424 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:45,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:45,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:26:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:45,773 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 20:26:45,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421259616] [2020-10-23 20:26:45,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:45,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:26:45,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159389039] [2020-10-23 20:26:45,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:26:45,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:45,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:26:45,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:26:45,800 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 6 states. [2020-10-23 20:26:46,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:46,343 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2020-10-23 20:26:46,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:26:46,345 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-23 20:26:46,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:46,356 INFO L225 Difference]: With dead ends: 74 [2020-10-23 20:26:46,356 INFO L226 Difference]: Without dead ends: 51 [2020-10-23 20:26:46,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:26:46,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-23 20:26:46,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-23 20:26:46,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-23 20:26:46,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-23 20:26:46,418 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 25 [2020-10-23 20:26:46,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:46,419 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-23 20:26:46,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:26:46,420 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-23 20:26:46,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 20:26:46,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:46,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:46,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:26:46,423 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:46,424 INFO L82 PathProgramCache]: Analyzing trace with hash 478831265, now seen corresponding path program 1 times [2020-10-23 20:26:46,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:46,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286807968] [2020-10-23 20:26:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:46,428 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:46,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:46,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:26:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:46,574 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 20:26:46,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286807968] [2020-10-23 20:26:46,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:46,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:26:46,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217292040] [2020-10-23 20:26:46,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:26:46,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:46,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:26:46,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:26:46,583 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 6 states. [2020-10-23 20:26:47,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:47,001 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-23 20:26:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:26:47,002 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-23 20:26:47,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:47,004 INFO L225 Difference]: With dead ends: 60 [2020-10-23 20:26:47,004 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 20:26:47,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:26:47,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 20:26:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-10-23 20:26:47,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-23 20:26:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-23 20:26:47,025 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 26 [2020-10-23 20:26:47,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:47,026 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-23 20:26:47,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:26:47,026 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-23 20:26:47,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 20:26:47,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:47,028 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:47,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:26:47,029 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:47,029 INFO L82 PathProgramCache]: Analyzing trace with hash -708858972, now seen corresponding path program 1 times [2020-10-23 20:26:47,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:47,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986919319] [2020-10-23 20:26:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:47,033 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:47,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:47,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:26:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:47,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:26:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:47,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 20:26:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 20:26:47,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986919319] [2020-10-23 20:26:47,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:47,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:26:47,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71821318] [2020-10-23 20:26:47,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:26:47,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:47,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:26:47,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:26:47,222 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 7 states. [2020-10-23 20:26:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:47,644 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-10-23 20:26:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:26:47,645 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-23 20:26:47,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:47,648 INFO L225 Difference]: With dead ends: 92 [2020-10-23 20:26:47,648 INFO L226 Difference]: Without dead ends: 55 [2020-10-23 20:26:47,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-23 20:26:47,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-23 20:26:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-23 20:26:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 20:26:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-23 20:26:47,669 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 42 [2020-10-23 20:26:47,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:47,670 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-23 20:26:47,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:26:47,670 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-23 20:26:47,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 20:26:47,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:47,673 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:47,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:26:47,673 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:47,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:47,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1629720462, now seen corresponding path program 1 times [2020-10-23 20:26:47,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:47,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813185931] [2020-10-23 20:26:47,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:47,678 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:47,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:47,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 20:26:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:47,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:26:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:47,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-23 20:26:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 20:26:47,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813185931] [2020-10-23 20:26:47,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:47,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:26:47,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818238630] [2020-10-23 20:26:47,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:26:47,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:47,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:26:47,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:26:47,928 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 8 states. [2020-10-23 20:26:48,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:48,705 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2020-10-23 20:26:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:26:48,706 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-23 20:26:48,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:48,713 INFO L225 Difference]: With dead ends: 84 [2020-10-23 20:26:48,713 INFO L226 Difference]: Without dead ends: 77 [2020-10-23 20:26:48,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:26:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-23 20:26:48,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2020-10-23 20:26:48,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-23 20:26:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-10-23 20:26:48,752 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 43 [2020-10-23 20:26:48,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:48,752 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-10-23 20:26:48,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:26:48,753 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-10-23 20:26:48,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-23 20:26:48,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:48,757 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:48,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:26:48,757 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:48,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:48,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1688308117, now seen corresponding path program 1 times [2020-10-23 20:26:48,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:48,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284995357] [2020-10-23 20:26:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:48,828 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 20:26:48,834 INFO L168 Benchmark]: Toolchain (without parser) took 4654.82 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 134.3 MB in the beginning and 141.8 MB in the end (delta: -7.5 MB). Peak memory consumption was 25.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:48,835 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 101.5 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:26:48,837 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.52 ms. Allocated memory is still 157.3 MB. Free memory was 133.8 MB in the beginning and 124.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:48,837 INFO L168 Benchmark]: Boogie Preprocessor took 38.31 ms. Allocated memory is still 157.3 MB. Free memory was 124.4 MB in the beginning and 122.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:48,838 INFO L168 Benchmark]: RCFGBuilder took 713.28 ms. Allocated memory is still 157.3 MB. Free memory was 122.5 MB in the beginning and 139.7 MB in the end (delta: -17.2 MB). Peak memory consumption was 18.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:48,840 INFO L168 Benchmark]: TraceAbstraction took 3635.26 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 139.5 MB in the beginning and 141.8 MB in the end (delta: -2.3 MB). Peak memory consumption was 29.7 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:48,844 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 101.5 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.52 ms. Allocated memory is still 157.3 MB. Free memory was 133.8 MB in the beginning and 124.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.31 ms. Allocated memory is still 157.3 MB. Free memory was 124.4 MB in the beginning and 122.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 713.28 ms. Allocated memory is still 157.3 MB. Free memory was 122.5 MB in the beginning and 139.7 MB in the end (delta: -17.2 MB). Peak memory consumption was 18.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3635.26 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 139.5 MB in the beginning and 141.8 MB in the end (delta: -2.3 MB). Peak memory consumption was 29.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.looppreprocessor.LoopPreprocessorFastUPR.preProcessLoop(LoopPreprocessorFastUPR.java:119) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...