/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:35:06,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:35:06,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:35:06,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 21:35:06,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 21:35:06,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 21:35:06,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 21:35:06,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 21:35:06,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 21:35:06,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 21:35:06,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 21:35:06,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 21:35:06,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:35:06,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:35:06,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:35:06,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:35:06,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:35:06,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:35:06,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:35:06,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:35:06,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:35:06,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:35:06,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:35:06,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:35:06,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:35:06,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-21 21:35:06,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-21 21:35:06,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-21 21:35:06,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-21 21:35:06,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-21 21:35:06,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-21 21:35:06,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-21 21:35:06,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-21 21:35:06,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:35:06,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:35:06,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:35:06,139 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:35:06,168 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:35:06,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:35:06,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:35:06,175 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:35:06,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:35:06,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:35:06,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:35:06,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:35:06,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:35:06,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:35:06,178 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:35:06,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:35:06,178 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:35:06,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:35:06,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:35:06,179 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:35:06,179 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:35:06,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:35:06,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:35:06,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:35:06,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:35:06,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:35:06,180 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:35:06,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:35:06,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:35:06,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:35:06,706 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:35:06,708 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:35:06,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter.c [2021-02-21 21:35:06,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7877c17ff/055462849ceb4f37b2ddeacf5c9c803c/FLAG14ab85fa7 [2021-02-21 21:35:07,689 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:35:07,690 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter.c [2021-02-21 21:35:07,705 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7877c17ff/055462849ceb4f37b2ddeacf5c9c803c/FLAG14ab85fa7 [2021-02-21 21:35:08,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7877c17ff/055462849ceb4f37b2ddeacf5c9c803c [2021-02-21 21:35:08,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:35:08,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:35:08,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:35:08,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:35:08,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:35:08,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:35:08" (1/1) ... [2021-02-21 21:35:08,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4871beea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:08, skipping insertion in model container [2021-02-21 21:35:08,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:35:08" (1/1) ... [2021-02-21 21:35:08,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:35:08,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:35:08,311 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] [2021-02-21 21:35:08,382 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-21 21:35:08,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:35:08,472 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:35:08,506 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] [2021-02-21 21:35:08,543 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-21 21:35:08,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:35:08,628 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:35:08,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:08 WrapperNode [2021-02-21 21:35:08,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:35:08,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:35:08,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:35:08,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:35:08,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:08" (1/1) ... [2021-02-21 21:35:08,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:08" (1/1) ... [2021-02-21 21:35:08,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:08" (1/1) ... [2021-02-21 21:35:08,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:08" (1/1) ... [2021-02-21 21:35:08,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:08" (1/1) ... [2021-02-21 21:35:08,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:08" (1/1) ... [2021-02-21 21:35:08,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:08" (1/1) ... [2021-02-21 21:35:08,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:35:08,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:35:08,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:35:08,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:35:08,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:35:08,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:35:08,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:35:08,882 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2021-02-21 21:35:08,882 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:35:08,882 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:35:08,882 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-02-21 21:35:08,882 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-02-21 21:35:08,883 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-02-21 21:35:08,883 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-02-21 21:35:08,883 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-02-21 21:35:08,883 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-02-21 21:35:08,883 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:35:08,884 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-02-21 21:35:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-21 21:35:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-21 21:35:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-21 21:35:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 21:35:08,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-21 21:35:08,885 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2021-02-21 21:35:08,885 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:35:08,885 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:35:08,885 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:35:08,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:35:08,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:35:08,886 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-02-21 21:35:08,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-21 21:35:08,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:35:08,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-21 21:35:08,887 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-02-21 21:35:08,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:35:08,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-21 21:35:08,887 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-02-21 21:35:08,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:35:08,887 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-02-21 21:35:08,888 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-02-21 21:35:08,888 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-02-21 21:35:08,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-02-21 21:35:08,888 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:35:08,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:35:08,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:35:08,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:35:10,081 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:35:10,082 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-21 21:35:10,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:35:10 BoogieIcfgContainer [2021-02-21 21:35:10,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:35:10,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:35:10,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:35:10,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:35:10,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:35:08" (1/3) ... [2021-02-21 21:35:10,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60212638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:35:10, skipping insertion in model container [2021-02-21 21:35:10,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:35:08" (2/3) ... [2021-02-21 21:35:10,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60212638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:35:10, skipping insertion in model container [2021-02-21 21:35:10,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:35:10" (3/3) ... [2021-02-21 21:35:10,109 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2021-02-21 21:35:10,120 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:35:10,128 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:35:10,154 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:35:10,206 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:35:10,206 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:35:10,206 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:35:10,206 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:35:10,206 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:35:10,207 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:35:10,207 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:35:10,207 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:35:10,242 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states. [2021-02-21 21:35:10,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-21 21:35:10,270 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:35:10,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:35:10,272 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:35:10,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:35:10,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1920344426, now seen corresponding path program 1 times [2021-02-21 21:35:10,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:35:10,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894690653] [2021-02-21 21:35:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:35:10,405 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:35:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:10,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:10,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:10,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:10,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:10,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:35:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:10,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:10,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 21:35:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:10,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:10,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-21 21:35:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:10,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:10,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-21 21:35:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:10,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:10,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:10,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-02-21 21:35:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:10,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:10,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:10,936 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:35:10,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-02-21 21:35:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:10,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:11,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:11,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-02-21 21:35:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:11,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:11,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:35:11,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894690653] [2021-02-21 21:35:11,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:35:11,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 21:35:11,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366931241] [2021-02-21 21:35:11,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 21:35:11,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:35:11,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 21:35:11,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-21 21:35:11,145 INFO L87 Difference]: Start difference. First operand 212 states. Second operand 11 states. [2021-02-21 21:35:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:35:12,988 INFO L93 Difference]: Finished difference Result 372 states and 433 transitions. [2021-02-21 21:35:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-21 21:35:12,990 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2021-02-21 21:35:12,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:35:13,012 INFO L225 Difference]: With dead ends: 372 [2021-02-21 21:35:13,012 INFO L226 Difference]: Without dead ends: 215 [2021-02-21 21:35:13,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-02-21 21:35:13,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-02-21 21:35:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 201. [2021-02-21 21:35:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2021-02-21 21:35:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 225 transitions. [2021-02-21 21:35:13,128 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 225 transitions. Word has length 65 [2021-02-21 21:35:13,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:35:13,129 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 225 transitions. [2021-02-21 21:35:13,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 21:35:13,129 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 225 transitions. [2021-02-21 21:35:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-02-21 21:35:13,135 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:35:13,135 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:35:13,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:35:13,136 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:35:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:35:13,137 INFO L82 PathProgramCache]: Analyzing trace with hash -643807836, now seen corresponding path program 1 times [2021-02-21 21:35:13,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:35:13,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040115772] [2021-02-21 21:35:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:35:13,143 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:35:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:13,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:13,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:13,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:13,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:13,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:13,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:13,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:13,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:13,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:13,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:13,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:35:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:13,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:13,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:13,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 21:35:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:13,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:13,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:13,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:13,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:35:13,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-21 21:35:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:13,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:13,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:13,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-21 21:35:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:13,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:13,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:13,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:13,485 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:35:13,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 21:35:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:13,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:13,519 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:13,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 21:35:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:13,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:13,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:13,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-21 21:35:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:13,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:13,556 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:13,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-02-21 21:35:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:13,578 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:13,579 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:13,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-02-21 21:35:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:13,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:13,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-21 21:35:13,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040115772] [2021-02-21 21:35:13,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:35:13,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 21:35:13,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003341350] [2021-02-21 21:35:13,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 21:35:13,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:35:13,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 21:35:13,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-02-21 21:35:13,634 INFO L87 Difference]: Start difference. First operand 201 states and 225 transitions. Second operand 12 states. [2021-02-21 21:35:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:35:15,564 INFO L93 Difference]: Finished difference Result 359 states and 405 transitions. [2021-02-21 21:35:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 21:35:15,565 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2021-02-21 21:35:15,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:35:15,571 INFO L225 Difference]: With dead ends: 359 [2021-02-21 21:35:15,572 INFO L226 Difference]: Without dead ends: 214 [2021-02-21 21:35:15,576 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 [2021-02-21 21:35:15,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-02-21 21:35:15,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 203. [2021-02-21 21:35:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2021-02-21 21:35:15,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 228 transitions. [2021-02-21 21:35:15,648 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 228 transitions. Word has length 85 [2021-02-21 21:35:15,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:35:15,649 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 228 transitions. [2021-02-21 21:35:15,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 21:35:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 228 transitions. [2021-02-21 21:35:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-02-21 21:35:15,659 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:35:15,659 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:35:15,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:35:15,664 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:35:15,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:35:15,665 INFO L82 PathProgramCache]: Analyzing trace with hash -89407090, now seen corresponding path program 1 times [2021-02-21 21:35:15,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:35:15,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804636291] [2021-02-21 21:35:15,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:35:15,672 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:35:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:15,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:15,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:15,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:15,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:35:15,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:15,820 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:35:15,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:15,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:35:15,832 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:15,833 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:15,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:35:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:15,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:15,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:15,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 21:35:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:15,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:15,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:15,953 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-21 21:35:15,955 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-21 21:35:15,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:15,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:35:15,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:15,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:35:16,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-21 21:35:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,016 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 21:35:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-21 21:35:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:16,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:16,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-02-21 21:35:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 21:35:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 21:35:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-02-21 21:35:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-02-21 21:35:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-21 21:35:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:16,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:16,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-02-21 21:35:16,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804636291] [2021-02-21 21:35:16,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:35:16,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-21 21:35:16,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645753074] [2021-02-21 21:35:16,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-21 21:35:16,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:35:16,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-21 21:35:16,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-02-21 21:35:16,181 INFO L87 Difference]: Start difference. First operand 203 states and 228 transitions. Second operand 14 states. [2021-02-21 21:35:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:35:17,945 INFO L93 Difference]: Finished difference Result 358 states and 404 transitions. [2021-02-21 21:35:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-21 21:35:17,946 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 106 [2021-02-21 21:35:17,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:35:17,950 INFO L225 Difference]: With dead ends: 358 [2021-02-21 21:35:17,951 INFO L226 Difference]: Without dead ends: 216 [2021-02-21 21:35:17,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-02-21 21:35:17,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-02-21 21:35:18,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 205. [2021-02-21 21:35:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2021-02-21 21:35:18,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 231 transitions. [2021-02-21 21:35:18,007 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 231 transitions. Word has length 106 [2021-02-21 21:35:18,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:35:18,007 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 231 transitions. [2021-02-21 21:35:18,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-21 21:35:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 231 transitions. [2021-02-21 21:35:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-02-21 21:35:18,010 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:35:18,010 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 21:35:18,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:35:18,011 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:35:18,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:35:18,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1296382630, now seen corresponding path program 1 times [2021-02-21 21:35:18,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:35:18,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096436691] [2021-02-21 21:35:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:35:18,016 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:35:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:18,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,148 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:18,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:18,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:18,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:18,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:35:18,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:18,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:35:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:18,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:18,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-21 21:35:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:18,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:18,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:18,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:18,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:18,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-21 21:35:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:18,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:18,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 21:35:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:18,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:18,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-21 21:35:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:18,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:18,420 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:35:18,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 21:35:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:18,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:18,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-21 21:35:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:18,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:18,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-02-21 21:35:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:18,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,467 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:18,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 21:35:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:18,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:18,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 21:35:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:18,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:18,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-02-21 21:35:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:18,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,485 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:18,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-02-21 21:35:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:18,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:18,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-02-21 21:35:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:18,573 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:18,591 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:18,592 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-02-21 21:35:18,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096436691] [2021-02-21 21:35:18,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:35:18,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-21 21:35:18,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817109548] [2021-02-21 21:35:18,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-21 21:35:18,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:35:18,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-21 21:35:18,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-02-21 21:35:18,644 INFO L87 Difference]: Start difference. First operand 205 states and 231 transitions. Second operand 17 states. [2021-02-21 21:35:20,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:35:20,882 INFO L93 Difference]: Finished difference Result 341 states and 383 transitions. [2021-02-21 21:35:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-21 21:35:20,882 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 132 [2021-02-21 21:35:20,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:35:20,886 INFO L225 Difference]: With dead ends: 341 [2021-02-21 21:35:20,886 INFO L226 Difference]: Without dead ends: 216 [2021-02-21 21:35:20,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-02-21 21:35:20,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-02-21 21:35:20,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 207. [2021-02-21 21:35:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-02-21 21:35:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 235 transitions. [2021-02-21 21:35:20,932 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 235 transitions. Word has length 132 [2021-02-21 21:35:20,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:35:20,933 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 235 transitions. [2021-02-21 21:35:20,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-21 21:35:20,934 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 235 transitions. [2021-02-21 21:35:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-02-21 21:35:20,937 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:35:20,937 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 21:35:20,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:35:20,938 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:35:20,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:35:20,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1254504573, now seen corresponding path program 1 times [2021-02-21 21:35:20,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:35:20,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235672118] [2021-02-21 21:35:20,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:35:20,942 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:35:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:35:20,989 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:35:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:35:21,037 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:35:21,106 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 21:35:21,106 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 21:35:21,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:35:21,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:35:21 BoogieIcfgContainer [2021-02-21 21:35:21,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:35:21,138 INFO L168 Benchmark]: Toolchain (without parser) took 13108.88 ms. Allocated memory was 156.2 MB in the beginning and 291.5 MB in the end (delta: 135.3 MB). Free memory was 133.1 MB in the beginning and 186.9 MB in the end (delta: -53.8 MB). Peak memory consumption was 82.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:35:21,139 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 156.2 MB. Free memory is still 129.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:35:21,139 INFO L168 Benchmark]: CACSL2BoogieTranslator took 587.60 ms. Allocated memory is still 156.2 MB. Free memory was 132.0 MB in the beginning and 119.8 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-21 21:35:21,140 INFO L168 Benchmark]: Boogie Preprocessor took 122.19 ms. Allocated memory is still 156.2 MB. Free memory was 119.8 MB in the beginning and 117.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 21:35:21,140 INFO L168 Benchmark]: RCFGBuilder took 1332.78 ms. Allocated memory is still 156.2 MB. Free memory was 117.4 MB in the beginning and 105.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 13.8 MB. Max. memory is 8.0 GB. [2021-02-21 21:35:21,141 INFO L168 Benchmark]: TraceAbstraction took 11042.27 ms. Allocated memory was 156.2 MB in the beginning and 291.5 MB in the end (delta: 135.3 MB). Free memory was 105.5 MB in the beginning and 186.9 MB in the end (delta: -81.4 MB). Peak memory consumption was 56.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:35:21,144 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 156.2 MB. Free memory is still 129.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 587.60 ms. Allocated memory is still 156.2 MB. Free memory was 132.0 MB in the beginning and 119.8 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 122.19 ms. Allocated memory is still 156.2 MB. Free memory was 119.8 MB in the beginning and 117.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1332.78 ms. Allocated memory is still 156.2 MB. Free memory was 117.4 MB in the beginning and 105.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 13.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11042.27 ms. Allocated memory was 156.2 MB in the beginning and 291.5 MB in the end (delta: 135.3 MB). Free memory was 105.5 MB in the beginning and 186.9 MB in the end (delta: -81.4 MB). Peak memory consumption was 56.0 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: 10.9s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 7.8s, 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, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.3s 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: 0.2s AutomataMinimizationTime, 4 MinimizatonAttempts, 45 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...