/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 0.2.1-dev-b7b32d2 [2021-02-21 20:30:39,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:30:39,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:30:39,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:30:39,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:30:39,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:30:39,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:30:39,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:30:39,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:30:39,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:30:39,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:30:39,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:30:39,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:30:39,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:30:39,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:30:39,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:30:39,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:30:39,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:30:39,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:30:39,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:30:39,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:30:39,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:30:39,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:30:39,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:30:40,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:30:40,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:30:40,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:30:40,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:30:40,038 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:30:40,066 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:30:40,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:30:40,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:30:40,071 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:30:40,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:30:40,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:30:40,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:30:40,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:30:40,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:30:40,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:30:40,073 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:30:40,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:30:40,074 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:30:40,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:30:40,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:30:40,075 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:30:40,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:30:40,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:30:40,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:30:40,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:30:40,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:30:40,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:30:40,076 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:30:40,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:30:40,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:30:40,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:30:40,623 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:30:40,623 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:30:40,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec.c [2021-02-21 20:30:40,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128850fe3/17284cabb17f4e8081c99bf542cb08b8/FLAG26d35bddb [2021-02-21 20:30:41,454 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:30:41,454 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c [2021-02-21 20:30:41,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128850fe3/17284cabb17f4e8081c99bf542cb08b8/FLAG26d35bddb [2021-02-21 20:30:41,833 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128850fe3/17284cabb17f4e8081c99bf542cb08b8 [2021-02-21 20:30:41,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:30:41,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:30:41,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:30:41,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:30:41,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:30:41,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:30:41" (1/1) ... [2021-02-21 20:30:41,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@704c1ee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:30:41, skipping insertion in model container [2021-02-21 20:30:41,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:30:41" (1/1) ... [2021-02-21 20:30:41,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:30:41,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:30:42,142 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_rec.c[585,598] [2021-02-21 20:30:42,165 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-21 20:30:42,166 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-21 20:30:42,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:30:42,233 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:30:42,252 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_rec.c[585,598] [2021-02-21 20:30:42,265 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-21 20:30:42,266 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-21 20:30:42,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:30:42,298 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:30:42,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:30:42 WrapperNode [2021-02-21 20:30:42,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:30:42,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:30:42,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:30:42,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:30:42,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:30:42" (1/1) ... [2021-02-21 20:30:42,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:30:42" (1/1) ... [2021-02-21 20:30:42,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:30:42" (1/1) ... [2021-02-21 20:30:42,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:30:42" (1/1) ... [2021-02-21 20:30:42,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:30:42" (1/1) ... [2021-02-21 20:30:42,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:30:42" (1/1) ... [2021-02-21 20:30:42,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:30:42" (1/1) ... [2021-02-21 20:30:42,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:30:42,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:30:42,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:30:42,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:30:42,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:30:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:30:42,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:30:42,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:30:42,462 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2021-02-21 20:30:42,463 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:30:42,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 20:30:42,463 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-02-21 20:30:42,463 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-02-21 20:30:42,463 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-02-21 20:30:42,464 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-02-21 20:30:42,464 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-02-21 20:30:42,464 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-02-21 20:30:42,464 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:30:42,464 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-02-21 20:30:42,465 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-21 20:30:42,465 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-21 20:30:42,465 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-21 20:30:42,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 20:30:42,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-21 20:30:42,466 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2021-02-21 20:30:42,466 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:30:42,466 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:30:42,466 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:30:42,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:30:42,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 20:30:42,467 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-02-21 20:30:42,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-21 20:30:42,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:30:42,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-21 20:30:42,467 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-02-21 20:30:42,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:30:42,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-21 20:30:42,468 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-02-21 20:30:42,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:30:42,468 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-02-21 20:30:42,468 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-02-21 20:30:42,469 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-02-21 20:30:42,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-02-21 20:30:42,469 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:30:42,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:30:42,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:30:42,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:30:43,123 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:30:43,124 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-21 20:30:43,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:30:43 BoogieIcfgContainer [2021-02-21 20:30:43,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:30:43,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:30:43,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:30:43,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:30:43,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:30:41" (1/3) ... [2021-02-21 20:30:43,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f1bccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:30:43, skipping insertion in model container [2021-02-21 20:30:43,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:30:42" (2/3) ... [2021-02-21 20:30:43,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f1bccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:30:43, skipping insertion in model container [2021-02-21 20:30:43,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:30:43" (3/3) ... [2021-02-21 20:30:43,137 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2021-02-21 20:30:43,145 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:30:43,151 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:30:43,172 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:30:43,197 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:30:43,198 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:30:43,198 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:30:43,198 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:30:43,198 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:30:43,198 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:30:43,199 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:30:43,199 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:30:43,220 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states. [2021-02-21 20:30:43,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-21 20:30:43,238 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:30:43,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:30:43,239 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:30:43,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:30:43,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1130694089, now seen corresponding path program 1 times [2021-02-21 20:30:43,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:30:43,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931394118] [2021-02-21 20:30:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:30:43,350 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:30:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:43,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:43,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:43,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:43,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:43,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:43,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:43,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:43,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:43,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:30:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:43,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:43,900 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:43,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 20:30:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:43,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:43,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:43,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-21 20:30:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:43,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:43,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:43,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-21 20:30:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:43,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:43,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:43,990 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:43,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:43,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-02-21 20:30:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:44,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:44,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:44,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:44,019 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:30:44,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-02-21 20:30:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:44,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:44,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:44,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-02-21 20:30:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:44,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:44,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:30:44,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931394118] [2021-02-21 20:30:44,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:30:44,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 20:30:44,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322226945] [2021-02-21 20:30:44,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 20:30:44,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:30:44,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 20:30:44,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-21 20:30:44,114 INFO L87 Difference]: Start difference. First operand 196 states. Second operand 11 states. [2021-02-21 20:30:45,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:30:45,390 INFO L93 Difference]: Finished difference Result 339 states and 397 transitions. [2021-02-21 20:30:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-21 20:30:45,392 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2021-02-21 20:30:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:30:45,408 INFO L225 Difference]: With dead ends: 339 [2021-02-21 20:30:45,409 INFO L226 Difference]: Without dead ends: 198 [2021-02-21 20:30:45,415 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 [2021-02-21 20:30:45,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-02-21 20:30:45,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 185. [2021-02-21 20:30:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-02-21 20:30:45,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 209 transitions. [2021-02-21 20:30:45,501 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 209 transitions. Word has length 65 [2021-02-21 20:30:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:30:45,502 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 209 transitions. [2021-02-21 20:30:45,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 20:30:45,503 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 209 transitions. [2021-02-21 20:30:45,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-02-21 20:30:45,508 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:30:45,508 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:30:45,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:30:45,509 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:30:45,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:30:45,510 INFO L82 PathProgramCache]: Analyzing trace with hash 130793923, now seen corresponding path program 1 times [2021-02-21 20:30:45,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:30:45,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988199263] [2021-02-21 20:30:45,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:30:45,514 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:30:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:45,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:45,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:45,585 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:45,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:30:45,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:45,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:30:45,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:45,602 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:30:45,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:45,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:45,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:30:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:45,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:45,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:45,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 20:30:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:45,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:45,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:45,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:45,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 20:30:45,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-21 20:30:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:45,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:45,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:45,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-21 20:30:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:45,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:45,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:30:45,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:45,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:30:45,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:30:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:45,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:45,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:45,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 20:30:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:45,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:45,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:45,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-21 20:30:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:45,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:45,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:45,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-02-21 20:30:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:45,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:45,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:45,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-02-21 20:30:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:45,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:45,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-21 20:30:45,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988199263] [2021-02-21 20:30:45,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:30:45,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 20:30:45,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203787276] [2021-02-21 20:30:45,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 20:30:45,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:30:45,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 20:30:45,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-02-21 20:30:45,833 INFO L87 Difference]: Start difference. First operand 185 states and 209 transitions. Second operand 12 states. [2021-02-21 20:30:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:30:47,365 INFO L93 Difference]: Finished difference Result 326 states and 372 transitions. [2021-02-21 20:30:47,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 20:30:47,366 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2021-02-21 20:30:47,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:30:47,370 INFO L225 Difference]: With dead ends: 326 [2021-02-21 20:30:47,370 INFO L226 Difference]: Without dead ends: 197 [2021-02-21 20:30:47,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-02-21 20:30:47,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-02-21 20:30:47,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2021-02-21 20:30:47,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-02-21 20:30:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 212 transitions. [2021-02-21 20:30:47,416 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 212 transitions. Word has length 85 [2021-02-21 20:30:47,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:30:47,416 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 212 transitions. [2021-02-21 20:30:47,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 20:30:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 212 transitions. [2021-02-21 20:30:47,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-02-21 20:30:47,421 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:30:47,421 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:30:47,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:30:47,422 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:30:47,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:30:47,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1555460186, now seen corresponding path program 1 times [2021-02-21 20:30:47,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:30:47,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766305476] [2021-02-21 20:30:47,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:30:47,426 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:30:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:47,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:47,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:30:47,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:30:47,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:30:47,496 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,497 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:47,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:30:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:47,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,537 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:47,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 20:30:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:47,628 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,629 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:47,632 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-21 20:30:47,633 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-21 20:30:47,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:30:47,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:30:47,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-21 20:30:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:47,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:47,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 20:30:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:47,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:47,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-21 20:30:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:47,739 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:47,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:47,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-02-21 20:30:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:47,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:47,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:30:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:47,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:47,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 20:30:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:47,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:47,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-02-21 20:30:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:47,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:47,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-02-21 20:30:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:47,803 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:47,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-21 20:30:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:47,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:47,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-02-21 20:30:47,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766305476] [2021-02-21 20:30:47,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:30:47,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-21 20:30:47,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95981864] [2021-02-21 20:30:47,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-21 20:30:47,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:30:47,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-21 20:30:47,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-02-21 20:30:47,852 INFO L87 Difference]: Start difference. First operand 187 states and 212 transitions. Second operand 14 states. [2021-02-21 20:30:49,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:30:49,350 INFO L93 Difference]: Finished difference Result 325 states and 371 transitions. [2021-02-21 20:30:49,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-21 20:30:49,351 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 106 [2021-02-21 20:30:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:30:49,354 INFO L225 Difference]: With dead ends: 325 [2021-02-21 20:30:49,354 INFO L226 Difference]: Without dead ends: 199 [2021-02-21 20:30:49,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-02-21 20:30:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-21 20:30:49,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 189. [2021-02-21 20:30:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2021-02-21 20:30:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 215 transitions. [2021-02-21 20:30:49,398 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 215 transitions. Word has length 106 [2021-02-21 20:30:49,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:30:49,398 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 215 transitions. [2021-02-21 20:30:49,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-21 20:30:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 215 transitions. [2021-02-21 20:30:49,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-02-21 20:30:49,401 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:30:49,401 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] [2021-02-21 20:30:49,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:30:49,401 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:30:49,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:30:49,402 INFO L82 PathProgramCache]: Analyzing trace with hash 306608542, now seen corresponding path program 1 times [2021-02-21 20:30:49,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:30:49,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398378206] [2021-02-21 20:30:49,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:30:49,405 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:30:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:49,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:49,496 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:49,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:49,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:49,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:30:49,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,522 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:49,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:30:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:49,573 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:49,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 20:30:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:49,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:49,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:30:49,659 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:30:49,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:30:49,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-21 20:30:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:49,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:49,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 20:30:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:49,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:49,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-21 20:30:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:49,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:30:49,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:30:49,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 20:30:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:49,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:49,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-21 20:30:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:49,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,800 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:49,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-02-21 20:30:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:49,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:49,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:30:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:49,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:49,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 20:30:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:49,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:49,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-02-21 20:30:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:49,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:49,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-02-21 20:30:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:49,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:30:49,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-02-21 20:30:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:30:49,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:49,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:30:49,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:30:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-02-21 20:30:49,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398378206] [2021-02-21 20:30:49,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:30:49,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-21 20:30:49,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192870987] [2021-02-21 20:30:49,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-21 20:30:49,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:30:49,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-21 20:30:49,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-02-21 20:30:49,940 INFO L87 Difference]: Start difference. First operand 189 states and 215 transitions. Second operand 17 states. [2021-02-21 20:30:51,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:30:51,809 INFO L93 Difference]: Finished difference Result 308 states and 350 transitions. [2021-02-21 20:30:51,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-21 20:30:51,809 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 132 [2021-02-21 20:30:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:30:51,813 INFO L225 Difference]: With dead ends: 308 [2021-02-21 20:30:51,813 INFO L226 Difference]: Without dead ends: 199 [2021-02-21 20:30:51,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-02-21 20:30:51,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-21 20:30:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 191. [2021-02-21 20:30:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-02-21 20:30:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 218 transitions. [2021-02-21 20:30:51,857 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 218 transitions. Word has length 132 [2021-02-21 20:30:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:30:51,858 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 218 transitions. [2021-02-21 20:30:51,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-21 20:30:51,858 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 218 transitions. [2021-02-21 20:30:51,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-02-21 20:30:51,861 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:30:51,861 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] [2021-02-21 20:30:51,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:30:51,862 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:30:51,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:30:51,862 INFO L82 PathProgramCache]: Analyzing trace with hash -296143499, now seen corresponding path program 1 times [2021-02-21 20:30:51,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:30:51,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529244870] [2021-02-21 20:30:51,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:30:51,865 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:30:51,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:30:51,907 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:30:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:30:51,951 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:30:52,012 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:30:52,013 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:30:52,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 20:30:52,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:30:52 BoogieIcfgContainer [2021-02-21 20:30:52,040 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:30:52,041 INFO L168 Benchmark]: Toolchain (without parser) took 10201.20 ms. Allocated memory was 168.8 MB in the beginning and 308.3 MB in the end (delta: 139.5 MB). Free memory was 143.7 MB in the beginning and 234.5 MB in the end (delta: -90.8 MB). Peak memory consumption was 49.8 MB. Max. memory is 8.0 GB. [2021-02-21 20:30:52,041 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 168.8 MB. Free memory is still 143.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:30:52,042 INFO L168 Benchmark]: CACSL2BoogieTranslator took 443.41 ms. Allocated memory is still 168.8 MB. Free memory was 142.4 MB in the beginning and 130.8 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-02-21 20:30:52,043 INFO L168 Benchmark]: Boogie Preprocessor took 59.63 ms. Allocated memory is still 168.8 MB. Free memory was 130.8 MB in the beginning and 128.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:30:52,043 INFO L168 Benchmark]: RCFGBuilder took 765.81 ms. Allocated memory is still 168.8 MB. Free memory was 128.7 MB in the beginning and 87.3 MB in the end (delta: 41.3 MB). Peak memory consumption was 41.9 MB. Max. memory is 8.0 GB. [2021-02-21 20:30:52,044 INFO L168 Benchmark]: TraceAbstraction took 8910.84 ms. Allocated memory was 168.8 MB in the beginning and 308.3 MB in the end (delta: 139.5 MB). Free memory was 86.9 MB in the beginning and 234.5 MB in the end (delta: -147.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:30:52,046 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 168.8 MB. Free memory is still 143.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 443.41 ms. Allocated memory is still 168.8 MB. Free memory was 142.4 MB in the beginning and 130.8 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.63 ms. Allocated memory is still 168.8 MB. Free memory was 130.8 MB in the beginning and 128.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 765.81 ms. Allocated memory is still 168.8 MB. Free memory was 128.7 MB in the beginning and 87.3 MB in the end (delta: 41.3 MB). Peak memory consumption was 41.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8910.84 ms. Allocated memory was 168.8 MB in the beginning and 308.3 MB in the end (delta: 139.5 MB). Free memory was 86.9 MB in the beginning and 234.5 MB in the end (delta: -147.6 MB). There was no memory consumed. 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: [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] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 199 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.8s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 697 SDtfs, 1402 SDslu, 2494 SDs, 0 SdLazy, 4527 SolverSat, 528 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=196occurred 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: 0.1s 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...