/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/verifythis/tree_del_iter_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:35:07,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:35:07,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:35:07,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 21:35:07,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 21:35:07,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 21:35:07,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 21:35:07,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 21:35:07,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 21:35:07,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 21:35:07,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 21:35:07,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 21:35:07,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:35:07,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:35:07,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:35:07,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:35:07,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:35:07,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:35:07,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:35:07,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:35:07,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:35:07,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:35:07,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:35:07,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:35:07,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:35:07,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-21 21:35:07,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-21 21:35:07,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-21 21:35:07,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-21 21:35:07,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-21 21:35:07,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-21 21:35:07,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-21 21:35:07,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-21 21:35:07,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:35:07,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:35:07,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:35:07,499 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:35:07,511 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:35:07,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:35:07,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:35:07,514 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:35:07,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:35:07,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:35:07,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:35:07,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:35:07,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:35:07,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:35:07,516 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:35:07,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:35:07,517 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:35:07,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:35:07,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:35:07,518 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:35:07,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:35:07,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:35:07,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:35:07,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:35:07,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:35:07,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:35:07,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:35:07,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:35:07,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:35:07,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:35:07,944 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:35:07,945 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:35:07,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2021-02-21 21:35:08,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c72e0d187/f911714c016e4519896ff9702cb60d6f/FLAGe4f87ab4a [2021-02-21 21:35:08,680 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:35:08,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2021-02-21 21:35:08,688 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c72e0d187/f911714c016e4519896ff9702cb60d6f/FLAGe4f87ab4a [2021-02-21 21:35:09,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c72e0d187/f911714c016e4519896ff9702cb60d6f [2021-02-21 21:35:09,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:35:09,024 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:35:09,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:35:09,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:35:09,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:35:09,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:35:09" (1/1) ... [2021-02-21 21:35:09,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a19bcf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:09, skipping insertion in model container [2021-02-21 21:35:09,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:35:09" (1/1) ... [2021-02-21 21:35:09,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:35:09,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:35:09,235 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c[619,632] [2021-02-21 21:35:09,256 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-21 21:35:09,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:35:09,298 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:35:09,313 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c[619,632] [2021-02-21 21:35:09,322 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-21 21:35:09,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:35:09,355 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:35:09,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:09 WrapperNode [2021-02-21 21:35:09,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:35:09,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:35:09,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:35:09,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:35:09,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:09" (1/1) ... [2021-02-21 21:35:09,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:09" (1/1) ... [2021-02-21 21:35:09,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:09" (1/1) ... [2021-02-21 21:35:09,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:09" (1/1) ... [2021-02-21 21:35:09,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:09" (1/1) ... [2021-02-21 21:35:09,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:09" (1/1) ... [2021-02-21 21:35:09,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:09" (1/1) ... [2021-02-21 21:35:09,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:35:09,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:35:09,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:35:09,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:35:09,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:35:09,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:35:09,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:35:09,518 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:35:09,519 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:35:09,519 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:35:09,519 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-02-21 21:35:09,519 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-02-21 21:35:09,520 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-02-21 21:35:09,520 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-02-21 21:35:09,520 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-02-21 21:35:09,521 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-02-21 21:35:09,521 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:35:09,521 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-02-21 21:35:09,522 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-21 21:35:09,522 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-21 21:35:09,522 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-21 21:35:09,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 21:35:09,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-21 21:35:09,526 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:35:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:35:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:35:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:35:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:35:09,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:35:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-02-21 21:35:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-21 21:35:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:35:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-21 21:35:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-02-21 21:35:09,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-21 21:35:09,529 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-02-21 21:35:09,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:35:09,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:35:09,529 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-02-21 21:35:09,530 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-02-21 21:35:09,530 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-02-21 21:35:09,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-02-21 21:35:09,530 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:35:09,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:35:09,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:35:09,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:35:10,261 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:35:10,261 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-21 21:35:10,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:35:10 BoogieIcfgContainer [2021-02-21 21:35:10,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:35:10,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:35:10,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:35:10,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:35:10,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:35:09" (1/3) ... [2021-02-21 21:35:10,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53cb39a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:35:10, skipping insertion in model container [2021-02-21 21:35:10,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:09" (2/3) ... [2021-02-21 21:35:10,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53cb39a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:35:10, skipping insertion in model container [2021-02-21 21:35:10,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:35:10" (3/3) ... [2021-02-21 21:35:10,280 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2021-02-21 21:35:10,287 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:35:10,292 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:35:10,313 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:35:10,351 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:35:10,351 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:35:10,352 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:35:10,352 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:35:10,352 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:35:10,352 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:35:10,352 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:35:10,352 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:35:10,381 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states. [2021-02-21 21:35:10,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-21 21:35:10,405 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:35:10,406 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] [2021-02-21 21:35:10,406 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:35:10,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:35:10,415 INFO L82 PathProgramCache]: Analyzing trace with hash 752127615, now seen corresponding path program 1 times [2021-02-21 21:35:10,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:35:10,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839345156] [2021-02-21 21:35:10,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:35:10,519 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:35:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:10,790 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,791 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:10,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:10,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,806 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:10,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:10,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:35:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:10,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:10,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 21:35:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:10,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:10,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-21 21:35:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:10,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,910 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:10,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-21 21:35:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:10,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:10,922 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:10,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-02-21 21:35:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:10,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:10,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:35:10,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-02-21 21:35:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:10,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:11,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-02-21 21:35:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:11,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:11,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:35:11,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839345156] [2021-02-21 21:35:11,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:35:11,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 21:35:11,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710079] [2021-02-21 21:35:11,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 21:35:11,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:35:11,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 21:35:11,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-21 21:35:11,053 INFO L87 Difference]: Start difference. First operand 205 states. Second operand 11 states. [2021-02-21 21:35:12,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:35:12,293 INFO L93 Difference]: Finished difference Result 363 states and 421 transitions. [2021-02-21 21:35:12,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-21 21:35:12,300 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2021-02-21 21:35:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:35:12,325 INFO L225 Difference]: With dead ends: 363 [2021-02-21 21:35:12,326 INFO L226 Difference]: Without dead ends: 210 [2021-02-21 21:35:12,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-02-21 21:35:12,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-02-21 21:35:12,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 196. [2021-02-21 21:35:12,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2021-02-21 21:35:12,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 219 transitions. [2021-02-21 21:35:12,423 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 219 transitions. Word has length 65 [2021-02-21 21:35:12,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:35:12,423 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 219 transitions. [2021-02-21 21:35:12,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 21:35:12,424 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 219 transitions. [2021-02-21 21:35:12,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-02-21 21:35:12,429 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:35:12,429 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:35:12,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:35:12,430 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:35:12,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:35:12,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1691521273, now seen corresponding path program 1 times [2021-02-21 21:35:12,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:35:12,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805391848] [2021-02-21 21:35:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:35:12,435 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:35:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:12,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:12,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:12,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:12,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:12,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:12,552 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:12,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:12,562 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:12,573 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:12,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:12,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:35:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:12,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:12,634 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:12,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 21:35:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:12,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:12,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:12,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:12,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:35:12,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-21 21:35:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:12,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:12,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:12,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-21 21:35:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:12,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:12,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:12,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:12,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:35:12,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 21:35:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:12,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:12,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:12,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 21:35:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:12,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:12,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:12,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-21 21:35:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:12,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:12,881 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:12,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-02-21 21:35:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:12,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:12,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:12,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-02-21 21:35:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:12,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:12,936 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-21 21:35:12,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805391848] [2021-02-21 21:35:12,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:35:12,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 21:35:12,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506929829] [2021-02-21 21:35:12,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 21:35:12,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:35:12,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 21:35:12,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-02-21 21:35:12,963 INFO L87 Difference]: Start difference. First operand 196 states and 219 transitions. Second operand 12 states. [2021-02-21 21:35:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:35:14,263 INFO L93 Difference]: Finished difference Result 354 states and 399 transitions. [2021-02-21 21:35:14,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 21:35:14,264 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2021-02-21 21:35:14,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:35:14,267 INFO L225 Difference]: With dead ends: 354 [2021-02-21 21:35:14,267 INFO L226 Difference]: Without dead ends: 209 [2021-02-21 21:35:14,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-02-21 21:35:14,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-02-21 21:35:14,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 198. [2021-02-21 21:35:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-02-21 21:35:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 222 transitions. [2021-02-21 21:35:14,312 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 222 transitions. Word has length 85 [2021-02-21 21:35:14,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:35:14,313 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 222 transitions. [2021-02-21 21:35:14,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 21:35:14,313 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 222 transitions. [2021-02-21 21:35:14,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-02-21 21:35:14,317 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:35:14,318 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:35:14,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:35:14,318 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:35:14,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:35:14,319 INFO L82 PathProgramCache]: Analyzing trace with hash -232363503, now seen corresponding path program 1 times [2021-02-21 21:35:14,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:35:14,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523267715] [2021-02-21 21:35:14,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:35:14,322 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:35:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:14,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:14,367 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:35:14,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:35:14,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:35:14,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:14,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:35:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:14,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:14,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 21:35:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:14,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:14,449 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-21 21:35:14,450 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-21 21:35:14,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:35:14,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:35:14,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-21 21:35:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:14,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:14,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 21:35:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:14,505 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,505 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:14,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-21 21:35:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:14,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:14,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:14,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-02-21 21:35:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:14,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:14,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 21:35:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:14,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:14,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 21:35:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:14,550 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,551 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:14,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-02-21 21:35:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:14,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,556 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:14,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-02-21 21:35:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:14,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:14,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-21 21:35:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:14,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:14,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-02-21 21:35:14,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523267715] [2021-02-21 21:35:14,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:35:14,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-21 21:35:14,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877650199] [2021-02-21 21:35:14,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-21 21:35:14,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:35:14,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-21 21:35:14,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-02-21 21:35:14,640 INFO L87 Difference]: Start difference. First operand 198 states and 222 transitions. Second operand 14 states. [2021-02-21 21:35:15,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:35:15,802 INFO L93 Difference]: Finished difference Result 353 states and 398 transitions. [2021-02-21 21:35:15,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-21 21:35:15,802 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 106 [2021-02-21 21:35:15,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:35:15,808 INFO L225 Difference]: With dead ends: 353 [2021-02-21 21:35:15,809 INFO L226 Difference]: Without dead ends: 211 [2021-02-21 21:35:15,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-02-21 21:35:15,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-02-21 21:35:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 200. [2021-02-21 21:35:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2021-02-21 21:35:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 225 transitions. [2021-02-21 21:35:15,870 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 225 transitions. Word has length 106 [2021-02-21 21:35:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:35:15,871 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 225 transitions. [2021-02-21 21:35:15,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-21 21:35:15,871 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 225 transitions. [2021-02-21 21:35:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-02-21 21:35:15,878 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:35:15,878 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:35:15,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:35:15,879 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:35:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:35:15,880 INFO L82 PathProgramCache]: Analyzing trace with hash 951206536, now seen corresponding path program 1 times [2021-02-21 21:35:15,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:35:15,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285059149] [2021-02-21 21:35:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:35:15,884 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:35:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:15,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:15,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:15,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:15,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:15,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:15,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:15,978 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:15,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:15,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:15,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:35:15,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:15,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:35:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 21:35:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:16,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:16,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:16,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-21 21:35:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 21:35:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,153 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,153 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-21 21:35:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,175 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:16,190 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,191 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:35:16,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 21:35:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 21:35:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,215 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-21 21:35:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 21:35:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 21:35:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-02-21 21:35:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-02-21 21:35:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-02-21 21:35:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:16,291 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,292 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-02-21 21:35:16,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285059149] [2021-02-21 21:35:16,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:35:16,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-21 21:35:16,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122822139] [2021-02-21 21:35:16,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-21 21:35:16,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:35:16,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-21 21:35:16,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-02-21 21:35:16,335 INFO L87 Difference]: Start difference. First operand 200 states and 225 transitions. Second operand 17 states. [2021-02-21 21:35:17,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:35:17,951 INFO L93 Difference]: Finished difference Result 336 states and 377 transitions. [2021-02-21 21:35:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-21 21:35:17,951 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 129 [2021-02-21 21:35:17,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:35:17,954 INFO L225 Difference]: With dead ends: 336 [2021-02-21 21:35:17,954 INFO L226 Difference]: Without dead ends: 211 [2021-02-21 21:35:17,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-02-21 21:35:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-02-21 21:35:17,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2021-02-21 21:35:17,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2021-02-21 21:35:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 229 transitions. [2021-02-21 21:35:17,993 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 229 transitions. Word has length 129 [2021-02-21 21:35:17,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:35:17,994 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 229 transitions. [2021-02-21 21:35:17,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-21 21:35:17,994 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 229 transitions. [2021-02-21 21:35:17,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-02-21 21:35:17,997 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:35:17,997 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:35:17,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:35:17,997 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:35:17,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:35:17,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1631364703, now seen corresponding path program 1 times [2021-02-21 21:35:17,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:35:17,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251877898] [2021-02-21 21:35:17,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:35:18,001 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:35:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:35:18,040 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:35:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:35:18,077 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:35:18,136 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 21:35:18,137 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 21:35:18,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:35:18,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:35:18 BoogieIcfgContainer [2021-02-21 21:35:18,160 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:35:18,167 INFO L168 Benchmark]: Toolchain (without parser) took 9151.27 ms. Allocated memory was 156.2 MB in the beginning and 289.4 MB in the end (delta: 133.2 MB). Free memory was 131.9 MB in the beginning and 169.0 MB in the end (delta: -37.1 MB). Peak memory consumption was 97.5 MB. Max. memory is 8.0 GB. [2021-02-21 21:35:18,168 INFO L168 Benchmark]: CDTParser took 1.13 ms. Allocated memory is still 156.2 MB. Free memory is still 129.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:35:18,169 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.26 ms. Allocated memory is still 156.2 MB. Free memory was 130.7 MB in the beginning and 118.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-21 21:35:18,171 INFO L168 Benchmark]: Boogie Preprocessor took 53.50 ms. Allocated memory is still 156.2 MB. Free memory was 118.9 MB in the beginning and 116.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 21:35:18,171 INFO L168 Benchmark]: RCFGBuilder took 855.05 ms. Allocated memory is still 156.2 MB. Free memory was 116.5 MB in the beginning and 109.2 MB in the end (delta: 7.3 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. [2021-02-21 21:35:18,172 INFO L168 Benchmark]: TraceAbstraction took 7891.73 ms. Allocated memory was 156.2 MB in the beginning and 289.4 MB in the end (delta: 133.2 MB). Free memory was 108.7 MB in the beginning and 169.0 MB in the end (delta: -60.3 MB). Peak memory consumption was 74.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:35:18,181 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.13 ms. Allocated memory is still 156.2 MB. Free memory is still 129.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 326.26 ms. Allocated memory is still 156.2 MB. Free memory was 130.7 MB in the beginning and 118.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.50 ms. Allocated memory is still 156.2 MB. Free memory was 118.9 MB in the beginning and 116.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 855.05 ms. Allocated memory is still 156.2 MB. Free memory was 116.5 MB in the beginning and 109.2 MB in the end (delta: 7.3 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7891.73 ms. Allocated memory was 156.2 MB in the beginning and 289.4 MB in the end (delta: 133.2 MB). Free memory was 108.7 MB in the beginning and 169.0 MB in the end (delta: -60.3 MB). Peak memory consumption was 74.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L105] CALL, EXPR nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L30] RET, EXPR nondet_tree() [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; [L31] RET, EXPR nondet_tree() [L31] n->right = nondet_tree() [L32] return n; [L105] RET, EXPR nondet_tree() [L105] CALL task(nondet_tree()) [L83] CALL, EXPR min(t) [L37] COND FALSE !(!n) [L40] EXPR n->left [L40] CALL, EXPR min(n->left) [L37] COND TRUE !n [L38] return 2147483647; [L40] RET, EXPR min(n->left) [L40] int a = min(n->left); [L41] EXPR n->right [L41] CALL, EXPR min(n->right) [L37] COND TRUE !n [L38] return 2147483647; [L41] RET, EXPR min(n->right) [L41] int b = min(n->right); [L42] COND TRUE a <= b [L42] return a; [L83] RET, EXPR min(t) [L83] int a = min(t); [L84] int b; [L86] CALL, EXPR size(t) [L78] COND FALSE !(!t) [L79] EXPR t->left [L79] CALL, EXPR size(t->left) [L78] COND TRUE !t [L78] return 0; [L79] RET, EXPR size(t->left) [L79] EXPR t->right [L79] CALL, EXPR size(t->right) [L78] COND TRUE !t [L78] return 0; [L79] RET, EXPR size(t->right) [L79] return size(t->left) + size(t->right) + 1; [L86] RET, EXPR size(t) [L86] int n = size(t); [L87] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) [L87] RET assume_abort_if_not(n != 0) [L88] EXPR, FCALL calloc(n, sizeof(int)) [L88] int *x = calloc(n, sizeof(int)); [L89] CALL tree_inorder(t, x, n) [L67] COND FALSE !(!t) [L70] EXPR t->left [L70] CALL, EXPR tree_inorder(t->left, a, i) [L67] COND TRUE !t [L68] return i; [L70] RET, EXPR tree_inorder(t->left, a, i) [L70] i = tree_inorder(t->left, a, i) [L71] EXPR i++ [L71] EXPR t->data [L71] a[i++] = t->data [L72] EXPR t->right [L72] CALL, EXPR tree_inorder(t->right, a, i) [L67] COND TRUE !t [L68] return i; [L72] RET, EXPR tree_inorder(t->right, a, i) [L72] i = tree_inorder(t->right, a, i) [L73] return i; [L89] RET tree_inorder(t, x, n) [L90] EXPR x[0] [L90] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 208 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.7s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 714 SDtfs, 1676 SDslu, 2278 SDs, 0 SdLazy, 4923 SolverSat, 573 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=205occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 4 MinimizatonAttempts, 45 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...