/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:25:00,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:25:00,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:25:00,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-22 02:25:00,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-22 02:25:00,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-22 02:25:00,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-22 02:25:00,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-22 02:25:00,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-22 02:25:00,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-22 02:25:00,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-22 02:25:00,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-22 02:25:00,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:25:00,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:25:00,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:25:00,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:25:00,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:25:00,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:25:00,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:25:00,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:25:00,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:25:00,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:25:00,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:25:00,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:25:00,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-22 02:25:00,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-22 02:25:00,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-22 02:25:00,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-22 02:25:00,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-22 02:25:00,445 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-22 02:25:00,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-22 02:25:00,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-22 02:25:00,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-22 02:25:00,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-22 02:25:00,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-22 02:25:00,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-22 02:25:00,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-22 02:25:00,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-22 02:25:00,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:25:00,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:25:00,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:25:00,467 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:25:00,494 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:25:00,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:25:00,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:25:00,498 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:25:00,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:25:00,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:25:00,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:25:00,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:25:00,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:25:00,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:25:00,500 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:25:00,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:25:00,501 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:25:00,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:25:00,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:25:00,501 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:25:00,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:25:00,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:25:00,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:25:00,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:25:00,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:25:00,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:25:00,504 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:25:00,504 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:25:01,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:25:01,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:25:01,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:25:01,068 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:25:01,070 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:25:01,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter.c [2021-02-22 02:25:01,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a444eb9a/081a8658b62745658448ec17ffa85b4e/FLAG89f2818cd [2021-02-22 02:25:02,194 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:25:02,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter.c [2021-02-22 02:25:02,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a444eb9a/081a8658b62745658448ec17ffa85b4e/FLAG89f2818cd [2021-02-22 02:25:02,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a444eb9a/081a8658b62745658448ec17ffa85b4e [2021-02-22 02:25:02,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:25:02,459 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:25:02,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:25:02,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:25:02,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:25:02,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:25:02" (1/1) ... [2021-02-22 02:25:02,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a0b8e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:02, skipping insertion in model container [2021-02-22 02:25:02,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:25:02" (1/1) ... [2021-02-22 02:25:02,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:25:02,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:25:02,817 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.c[586,599] [2021-02-22 02:25:02,875 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-22 02:25:02,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:25:02,967 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:25:03,003 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.c[586,599] [2021-02-22 02:25:03,047 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-22 02:25:03,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:25:03,156 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:25:03,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:03 WrapperNode [2021-02-22 02:25:03,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:25:03,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:25:03,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:25:03,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:25:03,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:03" (1/1) ... [2021-02-22 02:25:03,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:03" (1/1) ... [2021-02-22 02:25:03,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:03" (1/1) ... [2021-02-22 02:25:03,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:03" (1/1) ... [2021-02-22 02:25:03,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:03" (1/1) ... [2021-02-22 02:25:03,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:03" (1/1) ... [2021-02-22 02:25:03,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:03" (1/1) ... [2021-02-22 02:25:03,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:25:03,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:25:03,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:25:03,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:25:03,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:03" (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 [2021-02-22 02:25:03,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:25:03,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:25:03,515 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2021-02-22 02:25:03,515 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:25:03,515 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:25:03,516 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-02-22 02:25:03,516 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-02-22 02:25:03,516 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-02-22 02:25:03,516 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-02-22 02:25:03,516 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-02-22 02:25:03,517 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-02-22 02:25:03,517 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:25:03,517 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-02-22 02:25:03,517 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-22 02:25:03,517 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-22 02:25:03,518 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-22 02:25:03,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:25:03,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-22 02:25:03,518 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2021-02-22 02:25:03,518 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:25:03,519 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:25:03,519 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:25:03,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:25:03,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:25:03,519 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-02-22 02:25:03,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-22 02:25:03,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:25:03,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-22 02:25:03,520 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-02-22 02:25:03,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:25:03,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-22 02:25:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-02-22 02:25:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:25:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-02-22 02:25:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-02-22 02:25:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-02-22 02:25:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-02-22 02:25:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:25:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:25:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:25:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:25:05,016 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:25:05,017 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-22 02:25:05,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:25:05 BoogieIcfgContainer [2021-02-22 02:25:05,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:25:05,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:25:05,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:25:05,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:25:05,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:25:02" (1/3) ... [2021-02-22 02:25:05,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54411740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:25:05, skipping insertion in model container [2021-02-22 02:25:05,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:03" (2/3) ... [2021-02-22 02:25:05,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54411740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:25:05, skipping insertion in model container [2021-02-22 02:25:05,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:25:05" (3/3) ... [2021-02-22 02:25:05,035 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2021-02-22 02:25:05,044 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:25:05,053 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:25:05,080 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:25:05,114 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:25:05,114 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:25:05,114 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:25:05,114 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:25:05,115 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:25:05,115 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:25:05,115 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:25:05,115 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:25:05,146 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states. [2021-02-22 02:25:05,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-22 02:25:05,168 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:25:05,169 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] [2021-02-22 02:25:05,170 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:25:05,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:25:05,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1920344426, now seen corresponding path program 1 times [2021-02-22 02:25:05,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:25:05,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640689915] [2021-02-22 02:25:05,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:25:05,300 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:25:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:05,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:05,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:05,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:05,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:25:05,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:05,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:25:05,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:05,730 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:05,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:25:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:05,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:05,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:05,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-22 02:25:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:05,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:05,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:05,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-22 02:25:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:05,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:05,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:05,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-22 02:25:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:05,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:05,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:05,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:05,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:25:05,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-02-22 02:25:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:05,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:05,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:25:05,900 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:05,900 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:25:05,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-02-22 02:25:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:05,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:05,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:05,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-02-22 02:25:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:05,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:05,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:25:06,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640689915] [2021-02-22 02:25:06,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:25:06,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-22 02:25:06,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6494220] [2021-02-22 02:25:06,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-22 02:25:06,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:25:06,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-22 02:25:06,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-22 02:25:06,040 INFO L87 Difference]: Start difference. First operand 212 states. Second operand 11 states. [2021-02-22 02:25:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:25:08,333 INFO L93 Difference]: Finished difference Result 372 states and 433 transitions. [2021-02-22 02:25:08,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-22 02:25:08,336 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2021-02-22 02:25:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:25:08,360 INFO L225 Difference]: With dead ends: 372 [2021-02-22 02:25:08,360 INFO L226 Difference]: Without dead ends: 215 [2021-02-22 02:25:08,370 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 [2021-02-22 02:25:08,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-02-22 02:25:08,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 201. [2021-02-22 02:25:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2021-02-22 02:25:08,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 225 transitions. [2021-02-22 02:25:08,511 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 225 transitions. Word has length 65 [2021-02-22 02:25:08,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:25:08,512 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 225 transitions. [2021-02-22 02:25:08,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-22 02:25:08,512 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 225 transitions. [2021-02-22 02:25:08,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-02-22 02:25:08,519 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:25:08,519 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] [2021-02-22 02:25:08,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:25:08,520 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:25:08,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:25:08,522 INFO L82 PathProgramCache]: Analyzing trace with hash -643807836, now seen corresponding path program 1 times [2021-02-22 02:25:08,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:25:08,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652271110] [2021-02-22 02:25:08,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:25:08,528 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:25:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:08,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:08,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:08,717 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:08,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:25:08,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:08,730 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:25:08,739 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:08,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:25:08,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:08,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:08,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:25:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:08,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:08,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:08,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-22 02:25:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:08,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:08,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:08,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:08,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:25:08,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-22 02:25:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:08,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:08,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:08,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-22 02:25:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:08,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:08,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:25:08,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:08,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 02:25:08,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 02:25:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:08,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:08,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:08,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-22 02:25:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:09,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:09,019 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:09,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-22 02:25:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:09,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:09,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:09,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-02-22 02:25:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:09,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:09,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:09,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-02-22 02:25:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:09,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:09,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-22 02:25:09,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652271110] [2021-02-22 02:25:09,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:25:09,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-22 02:25:09,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136015236] [2021-02-22 02:25:09,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-22 02:25:09,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:25:09,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-22 02:25:09,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-02-22 02:25:09,113 INFO L87 Difference]: Start difference. First operand 201 states and 225 transitions. Second operand 12 states. [2021-02-22 02:25:11,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:25:11,294 INFO L93 Difference]: Finished difference Result 359 states and 405 transitions. [2021-02-22 02:25:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-22 02:25:11,295 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2021-02-22 02:25:11,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:25:11,301 INFO L225 Difference]: With dead ends: 359 [2021-02-22 02:25:11,301 INFO L226 Difference]: Without dead ends: 214 [2021-02-22 02:25:11,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-02-22 02:25:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-02-22 02:25:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 203. [2021-02-22 02:25:11,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2021-02-22 02:25:11,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 228 transitions. [2021-02-22 02:25:11,365 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 228 transitions. Word has length 85 [2021-02-22 02:25:11,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:25:11,366 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 228 transitions. [2021-02-22 02:25:11,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-22 02:25:11,366 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 228 transitions. [2021-02-22 02:25:11,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-02-22 02:25:11,372 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:25:11,373 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] [2021-02-22 02:25:11,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:25:11,373 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:25:11,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:25:11,374 INFO L82 PathProgramCache]: Analyzing trace with hash -89407090, now seen corresponding path program 1 times [2021-02-22 02:25:11,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:25:11,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797859113] [2021-02-22 02:25:11,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:25:11,383 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:25:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:11,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:11,557 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:25:11,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,566 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:25:11,573 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:25:11,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,582 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:11,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:25:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:11,635 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:11,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-22 02:25:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:11,713 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,714 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:11,718 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-22 02:25:11,719 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-22 02:25:11,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 02:25:11,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 02:25:11,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-22 02:25:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:11,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:11,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-22 02:25:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:11,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:11,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-22 02:25:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:11,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,835 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:25:11,854 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:25:11,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-02-22 02:25:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:11,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:11,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 02:25:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:11,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:11,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-22 02:25:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:11,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,905 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:11,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-02-22 02:25:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:11,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:11,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-02-22 02:25:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:11,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:11,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-22 02:25:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:11,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:11,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-02-22 02:25:11,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797859113] [2021-02-22 02:25:11,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:25:11,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-22 02:25:11,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398823373] [2021-02-22 02:25:11,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-22 02:25:12,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:25:12,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-22 02:25:12,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-02-22 02:25:12,001 INFO L87 Difference]: Start difference. First operand 203 states and 228 transitions. Second operand 14 states. [2021-02-22 02:25:14,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:25:14,133 INFO L93 Difference]: Finished difference Result 358 states and 404 transitions. [2021-02-22 02:25:14,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-22 02:25:14,134 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 106 [2021-02-22 02:25:14,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:25:14,149 INFO L225 Difference]: With dead ends: 358 [2021-02-22 02:25:14,149 INFO L226 Difference]: Without dead ends: 216 [2021-02-22 02:25:14,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-02-22 02:25:14,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-02-22 02:25:14,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 205. [2021-02-22 02:25:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2021-02-22 02:25:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 231 transitions. [2021-02-22 02:25:14,256 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 231 transitions. Word has length 106 [2021-02-22 02:25:14,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:25:14,257 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 231 transitions. [2021-02-22 02:25:14,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-22 02:25:14,257 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 231 transitions. [2021-02-22 02:25:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-02-22 02:25:14,262 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:25:14,263 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] [2021-02-22 02:25:14,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 02:25:14,264 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:25:14,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:25:14,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1296382630, now seen corresponding path program 1 times [2021-02-22 02:25:14,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:25:14,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512722917] [2021-02-22 02:25:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:25:14,273 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:25:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:14,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:14,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:25:14,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:25:14,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:25:14,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:25:14,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,493 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:14,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:25:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:14,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:14,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-22 02:25:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:14,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,585 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:14,587 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,588 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:25:14,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:25:14,628 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:25:14,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-22 02:25:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:14,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:14,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-22 02:25:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:14,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:14,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-22 02:25:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:14,697 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,698 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:25:14,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 02:25:14,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-22 02:25:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:14,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,745 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:14,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:25:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:14,750 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:14,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-02-22 02:25:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:14,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:14,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 02:25:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:14,774 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:14,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-22 02:25:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:14,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,781 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:14,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-02-22 02:25:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:14,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:14,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-02-22 02:25:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:14,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:14,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-02-22 02:25:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:14,854 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,855 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:25:14,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:14,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:25:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-02-22 02:25:14,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512722917] [2021-02-22 02:25:14,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:25:14,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-22 02:25:14,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604216942] [2021-02-22 02:25:14,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-22 02:25:14,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:25:14,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-22 02:25:14,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-02-22 02:25:14,953 INFO L87 Difference]: Start difference. First operand 205 states and 231 transitions. Second operand 17 states. [2021-02-22 02:25:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:25:17,735 INFO L93 Difference]: Finished difference Result 341 states and 383 transitions. [2021-02-22 02:25:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-22 02:25:17,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 132 [2021-02-22 02:25:17,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:25:17,741 INFO L225 Difference]: With dead ends: 341 [2021-02-22 02:25:17,741 INFO L226 Difference]: Without dead ends: 216 [2021-02-22 02:25:17,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-02-22 02:25:17,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-02-22 02:25:17,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 207. [2021-02-22 02:25:17,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-02-22 02:25:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 235 transitions. [2021-02-22 02:25:17,798 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 235 transitions. Word has length 132 [2021-02-22 02:25:17,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:25:17,799 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 235 transitions. [2021-02-22 02:25:17,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-22 02:25:17,799 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 235 transitions. [2021-02-22 02:25:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-02-22 02:25:17,804 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:25:17,805 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] [2021-02-22 02:25:17,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 02:25:17,806 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:25:17,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:25:17,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1254504573, now seen corresponding path program 1 times [2021-02-22 02:25:17,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:25:17,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238784975] [2021-02-22 02:25:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:25:17,811 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:25:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:25:17,876 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:25:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:25:17,944 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:25:18,093 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:25:18,093 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:25:18,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-22 02:25:18,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:25:18 BoogieIcfgContainer [2021-02-22 02:25:18,159 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:25:18,170 INFO L168 Benchmark]: Toolchain (without parser) took 15719.31 ms. Allocated memory was 151.0 MB in the beginning and 267.4 MB in the end (delta: 116.4 MB). Free memory was 127.3 MB in the beginning and 155.7 MB in the end (delta: -28.5 MB). Peak memory consumption was 89.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:25:18,173 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:25:18,174 INFO L168 Benchmark]: CACSL2BoogieTranslator took 692.19 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 114.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-22 02:25:18,175 INFO L168 Benchmark]: Boogie Preprocessor took 191.69 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 112.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:25:18,179 INFO L168 Benchmark]: RCFGBuilder took 1668.02 ms. Allocated memory is still 151.0 MB. Free memory was 111.9 MB in the beginning and 99.2 MB in the end (delta: 12.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 8.0 GB. [2021-02-22 02:25:18,179 INFO L168 Benchmark]: TraceAbstraction took 13135.65 ms. Allocated memory was 151.0 MB in the beginning and 267.4 MB in the end (delta: 116.4 MB). Free memory was 98.7 MB in the beginning and 155.7 MB in the end (delta: -57.0 MB). Peak memory consumption was 61.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:25:18,186 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 692.19 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 114.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 191.69 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 112.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1668.02 ms. Allocated memory is still 151.0 MB. Free memory was 111.9 MB in the beginning and 99.2 MB in the end (delta: 12.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13135.65 ms. Allocated memory was 151.0 MB in the beginning and 267.4 MB in the end (delta: 116.4 MB). Free memory was 98.7 MB in the beginning and 155.7 MB in the end (delta: -57.0 MB). Peak memory consumption was 61.0 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: [L110] 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; [L110] RET, EXPR nondet_tree() [L110] CALL task(nondet_tree()) [L86] 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; [L86] RET, EXPR min(t) [L86] int a = min(t); [L87] int b; [L89] CALL, EXPR size(t) [L81] COND FALSE !(!t) [L82] EXPR t->left [L82] CALL, EXPR size(t->left) [L81] COND TRUE !t [L81] return 0; [L82] RET, EXPR size(t->left) [L82] EXPR t->right [L82] CALL, EXPR size(t->right) [L81] COND TRUE !t [L81] return 0; [L82] RET, EXPR size(t->right) [L82] return size(t->left) + size(t->right) + 1; [L89] RET, EXPR size(t) [L89] int n = size(t); [L90] CALL assume_cycle_if_not(n != 0) [L9] COND FALSE !(!cond) [L90] RET assume_cycle_if_not(n != 0) [L91] EXPR, FCALL calloc(n, sizeof(int)) [L91] int *x = calloc(n, sizeof(int)); [L92] CALL tree_inorder(t, x, n) [L70] COND FALSE !(!t) [L73] EXPR t->left [L73] CALL, EXPR tree_inorder(t->left, a, i) [L70] COND TRUE !t [L71] return i; [L73] RET, EXPR tree_inorder(t->left, a, i) [L73] i = tree_inorder(t->left, a, i) [L74] EXPR i++ [L74] EXPR t->data [L74] a[i++] = t->data [L75] EXPR t->right [L75] CALL, EXPR tree_inorder(t->right, a, i) [L70] COND TRUE !t [L71] return i; [L75] RET, EXPR tree_inorder(t->right, a, i) [L75] i = tree_inorder(t->right, a, i) [L76] return i; [L92] RET tree_inorder(t, x, n) [L93] EXPR x[0] [L93] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 215 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.9s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 9.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 737 SDtfs, 1770 SDslu, 2298 SDs, 0 SdLazy, 5098 SolverSat, 573 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred 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: 0.3s 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...