/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_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:44:29,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:44:29,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:44:29,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 00:44:29,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 00:44:29,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 00:44:29,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 00:44:29,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 00:44:29,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 00:44:29,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 00:44:29,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 00:44:29,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 00:44:29,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:44:29,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:44:29,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:44:29,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:44:29,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:44:29,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:44:29,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:44:29,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:44:29,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:44:29,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:44:29,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:44:29,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:44:29,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 00:44:29,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:44:29,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:44:29,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:44:29,410 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:44:29,436 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:44:29,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:44:29,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:44:29,442 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:44:29,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:44:29,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:44:29,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:44:29,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:44:29,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:44:29,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:44:29,445 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:44:29,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:44:29,445 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:44:29,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:44:29,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:44:29,447 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:44:29,447 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:44:29,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:44:29,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:44:29,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:44:29,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:44:29,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:44:29,448 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:44:29,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:44:29,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:44:29,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:44:29,901 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:44:29,910 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:44:29,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec.c [2020-11-07 00:44:29,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd38ffc3/65f2f1c48d874f33b9374e41a21b49a4/FLAG2eaf6cbbb [2020-11-07 00:44:30,664 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:44:30,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c [2020-11-07 00:44:30,674 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd38ffc3/65f2f1c48d874f33b9374e41a21b49a4/FLAG2eaf6cbbb [2020-11-07 00:44:30,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd38ffc3/65f2f1c48d874f33b9374e41a21b49a4 [2020-11-07 00:44:30,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:44:30,998 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:44:31,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:44:31,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:44:31,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:44:31,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:44:30" (1/1) ... [2020-11-07 00:44:31,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6821bfea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:31, skipping insertion in model container [2020-11-07 00:44:31,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:44:30" (1/1) ... [2020-11-07 00:44:31,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:44:31,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:44:31,212 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-07 00:44:31,215 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-07 00:44:31,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:44:31,249 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:44:31,276 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-07 00:44:31,277 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-07 00:44:31,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:44:31,313 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:44:31,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:31 WrapperNode [2020-11-07 00:44:31,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:44:31,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:44:31,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:44:31,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:44:31,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:31" (1/1) ... [2020-11-07 00:44:31,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:31" (1/1) ... [2020-11-07 00:44:31,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:31" (1/1) ... [2020-11-07 00:44:31,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:31" (1/1) ... [2020-11-07 00:44:31,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:31" (1/1) ... [2020-11-07 00:44:31,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:31" (1/1) ... [2020-11-07 00:44:31,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:31" (1/1) ... [2020-11-07 00:44:31,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:44:31,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:44:31,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:44:31,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:44:31,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:31" (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 [2020-11-07 00:44:31,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:44:31,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:44:31,473 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2020-11-07 00:44:31,473 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:44:31,473 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 00:44:31,473 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-11-07 00:44:31,473 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-11-07 00:44:31,474 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-11-07 00:44:31,474 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-11-07 00:44:31,474 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-11-07 00:44:31,474 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-11-07 00:44:31,474 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:44:31,475 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-11-07 00:44:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-07 00:44:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 00:44:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-07 00:44:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:44:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-07 00:44:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2020-11-07 00:44:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:44:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:44:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:44:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:44:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 00:44:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-11-07 00:44:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 00:44:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:44:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 00:44:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-11-07 00:44:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:44:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 00:44:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-11-07 00:44:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:44:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-11-07 00:44:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-11-07 00:44:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-11-07 00:44:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-11-07 00:44:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:44:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:44:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:44:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:44:32,526 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:44:32,526 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-07 00:44:32,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:44:32 BoogieIcfgContainer [2020-11-07 00:44:32,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:44:32,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:44:32,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:44:32,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:44:32,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:44:30" (1/3) ... [2020-11-07 00:44:32,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cca6b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:44:32, skipping insertion in model container [2020-11-07 00:44:32,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:44:31" (2/3) ... [2020-11-07 00:44:32,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cca6b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:44:32, skipping insertion in model container [2020-11-07 00:44:32,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:44:32" (3/3) ... [2020-11-07 00:44:32,538 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2020-11-07 00:44:32,554 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:44:32,558 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:44:32,571 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:44:32,596 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:44:32,597 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:44:32,597 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:44:32,597 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:44:32,597 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:44:32,597 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:44:32,597 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:44:32,598 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:44:32,618 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states. [2020-11-07 00:44:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-07 00:44:32,635 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:44:32,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:44:32,636 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:44:32,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:44:32,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1212435517, now seen corresponding path program 1 times [2020-11-07 00:44:32,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:44:32,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604582668] [2020-11-07 00:44:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:44:32,732 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:44:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:33,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:44:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:33,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-07 00:44:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:33,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:44:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:33,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-11-07 00:44:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:33,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-11-07 00:44:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:33,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-11-07 00:44:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:33,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-11-07 00:44:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:44:33,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604582668] [2020-11-07 00:44:33,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:44:33,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 00:44:33,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997475851] [2020-11-07 00:44:33,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 00:44:33,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:44:33,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 00:44:33,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:44:33,354 INFO L87 Difference]: Start difference. First operand 199 states. Second operand 11 states. [2020-11-07 00:44:34,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:44:34,899 INFO L93 Difference]: Finished difference Result 343 states and 402 transitions. [2020-11-07 00:44:34,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 00:44:34,901 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-11-07 00:44:34,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:44:34,919 INFO L225 Difference]: With dead ends: 343 [2020-11-07 00:44:34,919 INFO L226 Difference]: Without dead ends: 199 [2020-11-07 00:44:34,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-11-07 00:44:34,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-07 00:44:35,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 186. [2020-11-07 00:44:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-11-07 00:44:35,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 210 transitions. [2020-11-07 00:44:35,026 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 210 transitions. Word has length 66 [2020-11-07 00:44:35,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:44:35,027 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 210 transitions. [2020-11-07 00:44:35,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 00:44:35,027 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 210 transitions. [2020-11-07 00:44:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-07 00:44:35,033 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:44:35,033 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, 1] [2020-11-07 00:44:35,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:44:35,034 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:44:35,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:44:35,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1003200631, now seen corresponding path program 1 times [2020-11-07 00:44:35,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:44:35,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12080118] [2020-11-07 00:44:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:44:35,040 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:44:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:35,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:44:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:35,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-07 00:44:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:35,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:44:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:35,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-11-07 00:44:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:35,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:44:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:35,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-07 00:44:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:35,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-11-07 00:44:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:35,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-11-07 00:44:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:35,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-11-07 00:44:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 00:44:35,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12080118] [2020-11-07 00:44:35,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:44:35,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-11-07 00:44:35,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340971807] [2020-11-07 00:44:35,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-07 00:44:35,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:44:35,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-07 00:44:35,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:44:35,542 INFO L87 Difference]: Start difference. First operand 186 states and 210 transitions. Second operand 12 states. [2020-11-07 00:44:37,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:44:37,172 INFO L93 Difference]: Finished difference Result 328 states and 374 transitions. [2020-11-07 00:44:37,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 00:44:37,173 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-11-07 00:44:37,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:44:37,177 INFO L225 Difference]: With dead ends: 328 [2020-11-07 00:44:37,177 INFO L226 Difference]: Without dead ends: 198 [2020-11-07 00:44:37,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-11-07 00:44:37,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-11-07 00:44:37,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 188. [2020-11-07 00:44:37,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-11-07 00:44:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 213 transitions. [2020-11-07 00:44:37,226 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 213 transitions. Word has length 86 [2020-11-07 00:44:37,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:44:37,227 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 213 transitions. [2020-11-07 00:44:37,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-07 00:44:37,227 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 213 transitions. [2020-11-07 00:44:37,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-11-07 00:44:37,232 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:44:37,232 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, 1] [2020-11-07 00:44:37,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:44:37,232 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:44:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:44:37,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1179715517, now seen corresponding path program 1 times [2020-11-07 00:44:37,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:44:37,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019808988] [2020-11-07 00:44:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:44:37,239 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:44:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:37,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:44:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:37,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-07 00:44:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:37,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-07 00:44:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:37,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:44:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:37,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 00:44:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:37,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-07 00:44:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:37,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:44:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:37,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-07 00:44:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:37,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-11-07 00:44:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:37,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-11-07 00:44:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:37,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-11-07 00:44:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-07 00:44:37,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019808988] [2020-11-07 00:44:37,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:44:37,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 00:44:37,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077599034] [2020-11-07 00:44:37,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 00:44:37,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:44:37,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 00:44:37,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-11-07 00:44:37,601 INFO L87 Difference]: Start difference. First operand 188 states and 213 transitions. Second operand 14 states. [2020-11-07 00:44:39,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:44:39,383 INFO L93 Difference]: Finished difference Result 327 states and 373 transitions. [2020-11-07 00:44:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-07 00:44:39,386 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 107 [2020-11-07 00:44:39,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:44:39,392 INFO L225 Difference]: With dead ends: 327 [2020-11-07 00:44:39,394 INFO L226 Difference]: Without dead ends: 200 [2020-11-07 00:44:39,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-11-07 00:44:39,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-11-07 00:44:39,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 190. [2020-11-07 00:44:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-11-07 00:44:39,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 216 transitions. [2020-11-07 00:44:39,444 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 216 transitions. Word has length 107 [2020-11-07 00:44:39,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:44:39,445 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 216 transitions. [2020-11-07 00:44:39,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 00:44:39,445 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 216 transitions. [2020-11-07 00:44:39,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-11-07 00:44:39,447 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:44:39,448 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, 1, 1, 1, 1] [2020-11-07 00:44:39,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:44:39,448 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:44:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:44:39,449 INFO L82 PathProgramCache]: Analyzing trace with hash 163926763, now seen corresponding path program 1 times [2020-11-07 00:44:39,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:44:39,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871228754] [2020-11-07 00:44:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:44:39,453 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:44:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:39,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:44:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:39,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-07 00:44:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:39,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-07 00:44:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:39,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 00:44:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:39,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-07 00:44:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:39,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-07 00:44:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:39,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 00:44:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:39,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-11-07 00:44:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:39,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:44:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:39,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-07 00:44:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:39,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-11-07 00:44:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:39,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-11-07 00:44:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:39,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-11-07 00:44:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:44:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-07 00:44:39,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871228754] [2020-11-07 00:44:39,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:44:39,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-11-07 00:44:39,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376191725] [2020-11-07 00:44:39,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 00:44:39,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:44:39,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 00:44:39,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:44:39,898 INFO L87 Difference]: Start difference. First operand 190 states and 216 transitions. Second operand 17 states. [2020-11-07 00:44:42,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:44:42,222 INFO L93 Difference]: Finished difference Result 310 states and 352 transitions. [2020-11-07 00:44:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-07 00:44:42,223 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 133 [2020-11-07 00:44:42,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:44:42,226 INFO L225 Difference]: With dead ends: 310 [2020-11-07 00:44:42,226 INFO L226 Difference]: Without dead ends: 200 [2020-11-07 00:44:42,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 00:44:42,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-11-07 00:44:42,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 192. [2020-11-07 00:44:42,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-11-07 00:44:42,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 219 transitions. [2020-11-07 00:44:42,268 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 219 transitions. Word has length 133 [2020-11-07 00:44:42,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:44:42,268 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 219 transitions. [2020-11-07 00:44:42,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 00:44:42,269 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 219 transitions. [2020-11-07 00:44:42,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-07 00:44:42,271 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:44:42,272 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, 1, 1, 1, 1] [2020-11-07 00:44:42,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:44:42,272 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:44:42,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:44:42,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1253455348, now seen corresponding path program 1 times [2020-11-07 00:44:42,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:44:42,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895327158] [2020-11-07 00:44:42,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:44:42,276 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:44:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:44:42,326 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:44:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:44:42,400 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:44:42,498 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:44:42,498 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:44:42,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:44:42,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:44:42 BoogieIcfgContainer [2020-11-07 00:44:42,549 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:44:42,553 INFO L168 Benchmark]: Toolchain (without parser) took 11559.02 ms. Allocated memory was 159.4 MB in the beginning and 276.8 MB in the end (delta: 117.4 MB). Free memory was 135.2 MB in the beginning and 151.3 MB in the end (delta: -16.1 MB). Peak memory consumption was 101.5 MB. Max. memory is 8.0 GB. [2020-11-07 00:44:42,553 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 159.4 MB. Free memory is still 134.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:44:42,554 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.00 ms. Allocated memory is still 159.4 MB. Free memory was 134.6 MB in the beginning and 122.3 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-11-07 00:44:42,555 INFO L168 Benchmark]: Boogie Preprocessor took 59.35 ms. Allocated memory is still 159.4 MB. Free memory was 122.3 MB in the beginning and 120.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:44:42,556 INFO L168 Benchmark]: RCFGBuilder took 1153.37 ms. Allocated memory is still 159.4 MB. Free memory was 120.1 MB in the beginning and 111.4 MB in the end (delta: 8.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 8.0 GB. [2020-11-07 00:44:42,557 INFO L168 Benchmark]: TraceAbstraction took 10018.90 ms. Allocated memory was 159.4 MB in the beginning and 276.8 MB in the end (delta: 117.4 MB). Free memory was 111.4 MB in the beginning and 151.3 MB in the end (delta: -39.9 MB). Peak memory consumption was 77.5 MB. Max. memory is 8.0 GB. [2020-11-07 00:44:42,561 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 159.4 MB. Free memory is still 134.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 312.00 ms. Allocated memory is still 159.4 MB. Free memory was 134.6 MB in the beginning and 122.3 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.35 ms. Allocated memory is still 159.4 MB. Free memory was 122.3 MB in the beginning and 120.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1153.37 ms. Allocated memory is still 159.4 MB. Free memory was 120.1 MB in the beginning and 111.4 MB in the end (delta: 8.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10018.90 ms. Allocated memory was 159.4 MB in the beginning and 276.8 MB in the end (delta: 117.4 MB). Free memory was 111.4 MB in the beginning and 151.3 MB in the end (delta: -39.9 MB). Peak memory consumption was 77.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L102] 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; [L102] RET, EXPR nondet_tree() [L102] CALL task(nondet_tree()) [L78] CALL, EXPR min(t) [L37] COND FALSE !(!n) [L40] EXPR n->data [L40] int a = n->data; [L41] EXPR n->left [L41] CALL, EXPR min(n->left) [L37] COND TRUE !n [L38] return 2147483647; [L41] RET, EXPR min(n->left) [L41] int b = min(n->left); [L42] EXPR n->right [L42] CALL, EXPR min(n->right) [L37] COND TRUE !n [L38] return 2147483647; [L42] RET, EXPR min(n->right) [L42] int c = min(n->right); [L43] COND TRUE b <= a && b <= c [L43] return b; [L78] RET, EXPR min(t) [L78] int a = min(t); [L79] int b; [L81] CALL, EXPR size(t) [L73] COND FALSE !(!t) [L74] EXPR t->left [L74] CALL, EXPR size(t->left) [L73] COND TRUE !t [L73] return 0; [L74] RET, EXPR size(t->left) [L74] EXPR t->right [L74] CALL, EXPR size(t->right) [L73] COND TRUE !t [L73] return 0; [L74] RET, EXPR size(t->right) [L74] return size(t->left) + size(t->right) + 1; [L81] RET, EXPR size(t) [L81] int n = size(t); [L82] CALL assume_cycle_if_not(n != 0) [L9] COND FALSE !(!cond) [L82] RET assume_cycle_if_not(n != 0) [L83] EXPR, FCALL calloc(n, sizeof(int)) [L83] int *x = calloc(n, sizeof(int)); [L84] CALL tree_inorder(t, x, n) [L62] COND FALSE !(!t) [L65] EXPR t->left [L65] CALL, EXPR tree_inorder(t->left, a, i) [L62] COND TRUE !t [L63] return i; [L65] RET, EXPR tree_inorder(t->left, a, i) [L65] i = tree_inorder(t->left, a, i) [L66] EXPR i++ [L66] EXPR t->data [L66] a[i++] = t->data [L67] EXPR t->right [L67] CALL, EXPR tree_inorder(t->right, a, i) [L62] COND TRUE !t [L63] return i; [L67] RET, EXPR tree_inorder(t->right, a, i) [L67] i = tree_inorder(t->right, a, i) [L68] return i; [L84] RET tree_inorder(t, x, n) [L85] EXPR x[0] [L85] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L16] CALL reach_error() [L14] __assert_fail("0", "tree_del_rec.c", 14, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 199 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.9s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 701 SDtfs, 1668 SDslu, 2462 SDs, 0 SdLazy, 4422 SolverSat, 641 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred 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, 41 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...