/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-36cd7be [2021-02-23 17:58:09,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:58:09,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:58:09,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 17:58:09,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 17:58:09,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 17:58:09,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 17:58:09,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 17:58:09,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 17:58:09,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 17:58:09,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 17:58:09,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 17:58:09,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:58:09,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:58:09,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:58:09,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:58:09,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:58:09,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:58:09,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:58:09,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:58:09,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:58:09,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:58:09,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:58:09,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:58:09,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 17:58:09,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 17:58:09,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 17:58:09,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 17:58:09,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 17:58:09,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 17:58:09,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 17:58:09,588 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 17:58:09,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 17:58:09,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 17:58:09,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 17:58:09,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 17:58:09,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 17:58:09,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 17:58:09,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:58:09,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:58:09,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:58:09,597 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 17:58:09,610 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:58:09,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:58:09,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:58:09,613 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:58:09,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:58:09,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:58:09,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:58:09,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:58:09,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:58:09,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:58:09,614 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:58:09,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:58:09,615 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:58:09,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:58:09,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:58:09,616 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:58:09,616 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:58:09,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:58:09,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:58:09,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:58:09,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:58:09,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:58:09,617 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:58:10,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:58:10,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:58:10,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:58:10,078 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:58:10,078 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:58:10,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec.c [2021-02-23 17:58:10,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef5cfcca7/580cd2a04fa9498eb91ac9eefbb6e282/FLAG0e97b9736 [2021-02-23 17:58:10,772 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:58:10,773 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c [2021-02-23 17:58:10,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef5cfcca7/580cd2a04fa9498eb91ac9eefbb6e282/FLAG0e97b9736 [2021-02-23 17:58:11,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef5cfcca7/580cd2a04fa9498eb91ac9eefbb6e282 [2021-02-23 17:58:11,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:58:11,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:58:11,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:58:11,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:58:11,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:58:11,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:58:11" (1/1) ... [2021-02-23 17:58:11,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21b8affa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:11, skipping insertion in model container [2021-02-23 17:58:11,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:58:11" (1/1) ... [2021-02-23 17:58:11,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:58:11,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:58:11,445 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] [2021-02-23 17:58:11,471 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-23 17:58:11,473 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-23 17:58:11,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:58:11,538 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:58:11,559 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] [2021-02-23 17:58:11,574 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-23 17:58:11,578 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-23 17:58:11,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:58:11,635 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:58:11,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:11 WrapperNode [2021-02-23 17:58:11,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:58:11,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:58:11,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:58:11,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:58:11,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:11" (1/1) ... [2021-02-23 17:58:11,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:11" (1/1) ... [2021-02-23 17:58:11,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:11" (1/1) ... [2021-02-23 17:58:11,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:11" (1/1) ... [2021-02-23 17:58:11,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:11" (1/1) ... [2021-02-23 17:58:11,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:11" (1/1) ... [2021-02-23 17:58:11,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:11" (1/1) ... [2021-02-23 17:58:11,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:58:11,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:58:11,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:58:11,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:58:11,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:11" (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 [2021-02-23 17:58:11,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:58:11,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:58:11,793 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2021-02-23 17:58:11,793 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:58:11,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 17:58:11,794 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-02-23 17:58:11,794 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-02-23 17:58:11,794 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-02-23 17:58:11,794 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-02-23 17:58:11,794 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-02-23 17:58:11,794 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-02-23 17:58:11,795 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:58:11,795 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-02-23 17:58:11,795 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-23 17:58:11,795 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 17:58:11,795 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 17:58:11,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 17:58:11,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 17:58:11,796 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2021-02-23 17:58:11,796 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:58:11,796 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:58:11,796 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:58:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:58:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 17:58:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-02-23 17:58:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 17:58:11,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:58:11,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 17:58:11,798 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-02-23 17:58:11,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:58:11,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 17:58:11,798 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-02-23 17:58:11,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:58:11,798 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-02-23 17:58:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-02-23 17:58:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-02-23 17:58:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-02-23 17:58:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:58:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:58:11,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:58:11,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:58:12,500 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:58:12,501 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-23 17:58:12,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:58:12 BoogieIcfgContainer [2021-02-23 17:58:12,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:58:12,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:58:12,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:58:12,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:58:12,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:58:11" (1/3) ... [2021-02-23 17:58:12,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eac74cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:58:12, skipping insertion in model container [2021-02-23 17:58:12,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:58:11" (2/3) ... [2021-02-23 17:58:12,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eac74cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:58:12, skipping insertion in model container [2021-02-23 17:58:12,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:58:12" (3/3) ... [2021-02-23 17:58:12,520 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2021-02-23 17:58:12,528 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:58:12,534 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:58:12,554 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:58:12,593 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:58:12,593 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:58:12,593 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:58:12,593 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:58:12,594 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:58:12,594 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:58:12,594 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:58:12,594 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:58:12,622 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states. [2021-02-23 17:58:12,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-23 17:58:12,639 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:58:12,640 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] [2021-02-23 17:58:12,640 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:58:12,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:58:12,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1130694089, now seen corresponding path program 1 times [2021-02-23 17:58:12,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:58:12,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761236000] [2021-02-23 17:58:12,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:58:12,753 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:58:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:13,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:13,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:13,147 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:13,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:58:13,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:13,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:58:13,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:13,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:13,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:58:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:13,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:13,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:13,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 17:58:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:13,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:13,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:13,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:58:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:13,314 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:13,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:13,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-23 17:58:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:13,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:13,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:13,337 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:13,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:58:13,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-02-23 17:58:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:13,392 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:13,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:58:13,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:13,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:58:13,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-02-23 17:58:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:13,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:13,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:13,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-02-23 17:58:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:13,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:13,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:58:13,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761236000] [2021-02-23 17:58:13,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:58:13,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 17:58:13,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895753921] [2021-02-23 17:58:13,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 17:58:13,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:58:13,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 17:58:13,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-23 17:58:13,529 INFO L87 Difference]: Start difference. First operand 196 states. Second operand 11 states. [2021-02-23 17:58:14,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:58:14,748 INFO L93 Difference]: Finished difference Result 339 states and 397 transitions. [2021-02-23 17:58:14,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 17:58:14,749 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2021-02-23 17:58:14,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:58:14,766 INFO L225 Difference]: With dead ends: 339 [2021-02-23 17:58:14,766 INFO L226 Difference]: Without dead ends: 198 [2021-02-23 17:58:14,772 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 [2021-02-23 17:58:14,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-02-23 17:58:14,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 185. [2021-02-23 17:58:14,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-02-23 17:58:14,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 209 transitions. [2021-02-23 17:58:14,863 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 209 transitions. Word has length 65 [2021-02-23 17:58:14,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:58:14,864 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 209 transitions. [2021-02-23 17:58:14,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 17:58:14,864 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 209 transitions. [2021-02-23 17:58:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-02-23 17:58:14,870 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:58:14,870 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] [2021-02-23 17:58:14,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:58:14,871 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:58:14,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:58:14,872 INFO L82 PathProgramCache]: Analyzing trace with hash 130793923, now seen corresponding path program 1 times [2021-02-23 17:58:14,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:58:14,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876626970] [2021-02-23 17:58:14,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:58:14,876 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:58:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:14,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:14,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:14,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:14,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:58:14,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:14,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:58:14,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:14,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:58:14,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:14,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:15,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:58:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:15,038 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:15,039 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:15,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 17:58:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:15,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:15,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:15,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:15,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 17:58:15,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 17:58:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:15,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:15,122 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:15,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-23 17:58:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:15,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:15,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:58:15,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:15,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 17:58:15,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:58:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:15,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:15,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:15,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:58:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:15,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:15,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:15,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-23 17:58:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:15,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:15,223 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:15,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-02-23 17:58:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:15,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:15,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:15,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-02-23 17:58:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:15,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:15,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-23 17:58:15,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876626970] [2021-02-23 17:58:15,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:58:15,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-23 17:58:15,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785678648] [2021-02-23 17:58:15,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 17:58:15,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:58:15,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 17:58:15,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-02-23 17:58:15,293 INFO L87 Difference]: Start difference. First operand 185 states and 209 transitions. Second operand 12 states. [2021-02-23 17:58:16,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:58:16,730 INFO L93 Difference]: Finished difference Result 326 states and 372 transitions. [2021-02-23 17:58:16,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 17:58:16,730 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2021-02-23 17:58:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:58:16,734 INFO L225 Difference]: With dead ends: 326 [2021-02-23 17:58:16,735 INFO L226 Difference]: Without dead ends: 197 [2021-02-23 17:58:16,738 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 [2021-02-23 17:58:16,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-02-23 17:58:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2021-02-23 17:58:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-02-23 17:58:16,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 212 transitions. [2021-02-23 17:58:16,785 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 212 transitions. Word has length 85 [2021-02-23 17:58:16,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:58:16,786 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 212 transitions. [2021-02-23 17:58:16,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 17:58:16,786 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 212 transitions. [2021-02-23 17:58:16,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-02-23 17:58:16,797 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:58:16,797 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] [2021-02-23 17:58:16,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:58:16,798 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:58:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:58:16,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1555460186, now seen corresponding path program 1 times [2021-02-23 17:58:16,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:58:16,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567403639] [2021-02-23 17:58:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:58:16,804 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:58:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:16,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:16,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:16,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:16,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:58:16,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:16,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:58:16,897 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:16,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:58:16,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:16,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:16,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:58:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:16,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:16,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:16,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 17:58:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:16,980 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:16,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:16,983 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-23 17:58:16,983 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-23 17:58:16,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:16,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 17:58:17,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:17,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 17:58:17,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-23 17:58:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:17,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:17,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:17,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 17:58:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:17,038 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:17,039 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:17,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-23 17:58:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:17,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:17,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:58:17,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:17,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:58:17,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-02-23 17:58:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:17,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:17,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:17,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:58:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:17,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:17,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:17,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:58:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:17,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:17,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:17,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-02-23 17:58:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:17,094 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:17,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:17,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-02-23 17:58:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:17,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:17,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:17,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-23 17:58:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:17,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:17,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-02-23 17:58:17,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567403639] [2021-02-23 17:58:17,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:58:17,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-23 17:58:17,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628782067] [2021-02-23 17:58:17,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 17:58:17,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:58:17,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 17:58:17,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-02-23 17:58:17,186 INFO L87 Difference]: Start difference. First operand 187 states and 212 transitions. Second operand 14 states. [2021-02-23 17:58:18,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:58:18,599 INFO L93 Difference]: Finished difference Result 325 states and 371 transitions. [2021-02-23 17:58:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-23 17:58:18,600 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 106 [2021-02-23 17:58:18,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:58:18,603 INFO L225 Difference]: With dead ends: 325 [2021-02-23 17:58:18,604 INFO L226 Difference]: Without dead ends: 199 [2021-02-23 17:58:18,605 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 [2021-02-23 17:58:18,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-23 17:58:18,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 189. [2021-02-23 17:58:18,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2021-02-23 17:58:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 215 transitions. [2021-02-23 17:58:18,657 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 215 transitions. Word has length 106 [2021-02-23 17:58:18,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:58:18,658 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 215 transitions. [2021-02-23 17:58:18,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 17:58:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 215 transitions. [2021-02-23 17:58:18,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-02-23 17:58:18,660 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:58:18,660 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] [2021-02-23 17:58:18,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 17:58:18,661 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:58:18,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:58:18,661 INFO L82 PathProgramCache]: Analyzing trace with hash 306608542, now seen corresponding path program 1 times [2021-02-23 17:58:18,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:58:18,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467908608] [2021-02-23 17:58:18,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:58:18,664 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:58:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:18,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:18,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:58:18,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:58:18,730 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:58:18,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,736 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:58:18,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:18,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:58:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:18,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,779 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:18,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 17:58:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:18,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:18,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:58:18,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,831 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:58:18,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:58:18,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-23 17:58:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:18,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:18,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 17:58:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:18,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:18,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-23 17:58:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:18,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:58:18,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 17:58:18,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-23 17:58:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:18,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:18,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-23 17:58:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:18,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:18,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-02-23 17:58:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:18,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,968 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:18,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:58:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:18,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:18,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:58:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:18,980 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:18,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-02-23 17:58:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:18,985 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:18,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:19,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-02-23 17:58:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:19,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:19,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:58:19,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-02-23 17:58:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:58:19,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:19,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:58:19,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:58:19,076 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:58:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-02-23 17:58:19,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467908608] [2021-02-23 17:58:19,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:58:19,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-23 17:58:19,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44810996] [2021-02-23 17:58:19,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 17:58:19,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:58:19,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 17:58:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-02-23 17:58:19,126 INFO L87 Difference]: Start difference. First operand 189 states and 215 transitions. Second operand 17 states. [2021-02-23 17:58:21,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:58:21,254 INFO L93 Difference]: Finished difference Result 308 states and 350 transitions. [2021-02-23 17:58:21,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 17:58:21,255 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 132 [2021-02-23 17:58:21,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:58:21,267 INFO L225 Difference]: With dead ends: 308 [2021-02-23 17:58:21,268 INFO L226 Difference]: Without dead ends: 199 [2021-02-23 17:58:21,270 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 [2021-02-23 17:58:21,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-23 17:58:21,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 191. [2021-02-23 17:58:21,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-02-23 17:58:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 218 transitions. [2021-02-23 17:58:21,327 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 218 transitions. Word has length 132 [2021-02-23 17:58:21,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:58:21,333 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 218 transitions. [2021-02-23 17:58:21,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 17:58:21,333 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 218 transitions. [2021-02-23 17:58:21,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-02-23 17:58:21,335 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:58:21,336 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] [2021-02-23 17:58:21,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 17:58:21,336 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:58:21,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:58:21,337 INFO L82 PathProgramCache]: Analyzing trace with hash -296143499, now seen corresponding path program 1 times [2021-02-23 17:58:21,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:58:21,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805002458] [2021-02-23 17:58:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:58:21,343 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:58:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:58:21,382 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:58:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:58:21,422 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:58:21,484 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 17:58:21,484 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 17:58:21,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 17:58:21,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:58:21 BoogieIcfgContainer [2021-02-23 17:58:21,508 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:58:21,509 INFO L168 Benchmark]: Toolchain (without parser) took 10379.29 ms. Allocated memory was 156.2 MB in the beginning and 278.9 MB in the end (delta: 122.7 MB). Free memory was 131.4 MB in the beginning and 157.8 MB in the end (delta: -26.4 MB). Peak memory consumption was 97.4 MB. Max. memory is 8.0 GB. [2021-02-23 17:58:21,510 INFO L168 Benchmark]: CDTParser took 1.13 ms. Allocated memory is still 156.2 MB. Free memory is still 129.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:58:21,510 INFO L168 Benchmark]: CACSL2BoogieTranslator took 489.29 ms. Allocated memory is still 156.2 MB. Free memory was 130.3 MB in the beginning and 118.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-02-23 17:58:21,511 INFO L168 Benchmark]: Boogie Preprocessor took 58.90 ms. Allocated memory is still 156.2 MB. Free memory was 118.5 MB in the beginning and 116.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 17:58:21,511 INFO L168 Benchmark]: RCFGBuilder took 809.35 ms. Allocated memory is still 156.2 MB. Free memory was 116.0 MB in the beginning and 110.7 MB in the end (delta: 5.3 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. [2021-02-23 17:58:21,512 INFO L168 Benchmark]: TraceAbstraction took 9000.01 ms. Allocated memory was 156.2 MB in the beginning and 278.9 MB in the end (delta: 122.7 MB). Free memory was 110.2 MB in the beginning and 157.8 MB in the end (delta: -47.5 MB). Peak memory consumption was 76.7 MB. Max. memory is 8.0 GB. [2021-02-23 17:58:21,514 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.13 ms. Allocated memory is still 156.2 MB. Free memory is still 129.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 489.29 ms. Allocated memory is still 156.2 MB. Free memory was 130.3 MB in the beginning and 118.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.90 ms. Allocated memory is still 156.2 MB. Free memory was 118.5 MB in the beginning and 116.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 809.35 ms. Allocated memory is still 156.2 MB. Free memory was 116.0 MB in the beginning and 110.7 MB in the end (delta: 5.3 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9000.01 ms. Allocated memory was 156.2 MB in the beginning and 278.9 MB in the end (delta: 122.7 MB). Free memory was 110.2 MB in the beginning and 157.8 MB in the end (delta: -47.5 MB). Peak memory consumption was 76.7 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: [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: 0.2s AutomataMinimizationTime, 4 MinimizatonAttempts, 41 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...