/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:18:07,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:18:07,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:18:07,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-01 08:18:07,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-01 08:18:07,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-01 08:18:07,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-01 08:18:07,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-01 08:18:07,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-01 08:18:07,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-01 08:18:07,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-01 08:18:07,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-01 08:18:07,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:18:07,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:18:07,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:18:07,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:18:07,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:18:07,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:18:07,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:18:07,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:18:07,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:18:07,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:18:07,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:18:07,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:18:07,291 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-01 08:18:07,291 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-01 08:18:07,291 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-01 08:18:07,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-01 08:18:07,292 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-01 08:18:07,293 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-01 08:18:07,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-01 08:18:07,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-01 08:18:07,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-01 08:18:07,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-01 08:18:07,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-01 08:18:07,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-01 08:18:07,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-01 08:18:07,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-01 08:18:07,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:18:07,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:18:07,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:18:07,301 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 08:18:07,319 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:18:07,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:18:07,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:18:07,323 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:18:07,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:18:07,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:18:07,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:18:07,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:18:07,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:18:07,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:18:07,325 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:18:07,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:18:07,325 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:18:07,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:18:07,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:18:07,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:18:07,326 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:18:07,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:18:07,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:18:07,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:18:07,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:18:07,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:18:07,326 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:18:07,326 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:18:07,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:18:07,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:18:07,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:18:07,734 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:18:07,735 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:18:07,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter.c [2021-05-01 08:18:07,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88c4d8987/e9f5b51a75224c4fa67e779623350459/FLAG1dd7e30fa [2021-05-01 08:18:08,298 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:18:08,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter.c [2021-05-01 08:18:08,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88c4d8987/e9f5b51a75224c4fa67e779623350459/FLAG1dd7e30fa [2021-05-01 08:18:08,776 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88c4d8987/e9f5b51a75224c4fa67e779623350459 [2021-05-01 08:18:08,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:18:08,780 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:18:08,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:18:08,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:18:08,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:18:08,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:18:08" (1/1) ... [2021-05-01 08:18:08,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@316a399a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:08, skipping insertion in model container [2021-05-01 08:18:08,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:18:08" (1/1) ... [2021-05-01 08:18:08,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:18:08,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:18:08,920 WARN L224 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] [2021-05-01 08:18:08,931 WARN L1507 CHandler]: Possible shadowing of function min [2021-05-01 08:18:08,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:18:08,955 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:18:08,970 WARN L224 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] [2021-05-01 08:18:09,004 WARN L1507 CHandler]: Possible shadowing of function min [2021-05-01 08:18:09,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:18:09,061 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:18:09,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:09 WrapperNode [2021-05-01 08:18:09,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:18:09,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:18:09,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:18:09,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:18:09,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:09" (1/1) ... [2021-05-01 08:18:09,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:09" (1/1) ... [2021-05-01 08:18:09,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:09" (1/1) ... [2021-05-01 08:18:09,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:09" (1/1) ... [2021-05-01 08:18:09,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:09" (1/1) ... [2021-05-01 08:18:09,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:09" (1/1) ... [2021-05-01 08:18:09,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:09" (1/1) ... [2021-05-01 08:18:09,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:18:09,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:18:09,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:18:09,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:18:09,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:09" (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 [2021-05-01 08:18:09,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:18:09,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:18:09,220 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2021-05-01 08:18:09,220 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:18:09,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:18:09,221 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-05-01 08:18:09,221 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-05-01 08:18:09,221 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-05-01 08:18:09,221 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-05-01 08:18:09,222 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-05-01 08:18:09,222 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-05-01 08:18:09,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:18:09,222 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-05-01 08:18:09,222 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-05-01 08:18:09,222 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-05-01 08:18:09,223 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-05-01 08:18:09,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 08:18:09,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-01 08:18:09,224 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2021-05-01 08:18:09,224 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:18:09,224 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:18:09,224 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:18:09,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:18:09,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:18:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-05-01 08:18:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-05-01 08:18:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:18:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-05-01 08:18:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-05-01 08:18:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:18:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-05-01 08:18:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-05-01 08:18:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:18:09,225 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-05-01 08:18:09,226 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-05-01 08:18:09,226 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-05-01 08:18:09,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-05-01 08:18:09,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:18:09,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:18:09,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:18:09,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:18:09,779 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:18:09,779 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-01 08:18:09,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:18:09 BoogieIcfgContainer [2021-05-01 08:18:09,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:18:09,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:18:09,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:18:09,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:18:09,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:18:08" (1/3) ... [2021-05-01 08:18:09,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aba8fb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:18:09, skipping insertion in model container [2021-05-01 08:18:09,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:18:09" (2/3) ... [2021-05-01 08:18:09,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aba8fb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:18:09, skipping insertion in model container [2021-05-01 08:18:09,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:18:09" (3/3) ... [2021-05-01 08:18:09,789 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2021-05-01 08:18:09,794 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:18:09,798 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:18:09,810 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:18:09,833 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:18:09,833 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:18:09,833 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:18:09,833 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:18:09,833 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:18:09,833 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:18:09,833 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:18:09,834 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:18:09,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 61 states have internal predecessors, (76), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-01 08:18:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-01 08:18:09,860 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:18:09,860 INFO L519 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] [2021-05-01 08:18:09,861 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:18:09,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:18:09,865 INFO L82 PathProgramCache]: Analyzing trace with hash -738616471, now seen corresponding path program 1 times [2021-05-01 08:18:09,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:18:09,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779447955] [2021-05-01 08:18:09,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:18:09,930 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:18:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:10,094 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:10,095 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:10,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:10,097 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:18:10,107 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:10,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:18:10,113 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:10,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:10,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:18:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:10,172 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:10,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:10,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-05-01 08:18:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:10,201 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:10,202 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:10,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 08:18:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:10,206 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:10,207 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:10,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-01 08:18:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:10,218 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:10,219 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:10,224 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:10,229 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:18:10,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-01 08:18:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:10,252 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:10,253 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:18:10,267 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:10,268 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:18:10,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-01 08:18:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:10,334 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:10,335 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:10,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-05-01 08:18:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:10,361 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:10,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 08:18:10,365 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:18:10,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779447955] [2021-05-01 08:18:10,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1779447955] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:18:10,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:18:10,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-01 08:18:10,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283952774] [2021-05-01 08:18:10,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-01 08:18:10,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:18:10,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-01 08:18:10,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-01 08:18:10,380 INFO L87 Difference]: Start difference. First operand has 98 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 61 states have internal predecessors, (76), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-01 08:18:11,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:18:11,118 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2021-05-01 08:18:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-01 08:18:11,119 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-01 08:18:11,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:18:11,128 INFO L225 Difference]: With dead ends: 174 [2021-05-01 08:18:11,128 INFO L226 Difference]: Without dead ends: 98 [2021-05-01 08:18:11,131 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 269.6ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-05-01 08:18:11,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-01 08:18:11,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2021-05-01 08:18:11,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 56 states have internal predecessors, (64), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2021-05-01 08:18:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2021-05-01 08:18:11,173 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 44 [2021-05-01 08:18:11,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:18:11,174 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2021-05-01 08:18:11,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-01 08:18:11,174 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2021-05-01 08:18:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-01 08:18:11,176 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:18:11,176 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-01 08:18:11,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:18:11,177 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:18:11,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:18:11,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1232690542, now seen corresponding path program 1 times [2021-05-01 08:18:11,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:18:11,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711444771] [2021-05-01 08:18:11,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:18:11,184 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:18:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:11,233 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:11,236 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:11,238 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:11,238 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:18:11,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:11,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:18:11,251 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:11,252 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:18:11,258 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:11,258 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:11,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:18:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:11,290 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:11,290 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:11,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-05-01 08:18:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:11,344 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:11,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-01 08:18:11,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 08:18:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:11,368 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:11,368 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:11,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-01 08:18:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:11,386 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:11,387 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:18:11,402 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:11,404 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-05-01 08:18:11,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-05-01 08:18:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:11,425 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:11,425 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:11,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-01 08:18:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:11,435 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:11,436 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:11,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-05-01 08:18:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:11,448 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:11,448 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:11,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-05-01 08:18:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:11,462 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:11,462 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:11,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-05-01 08:18:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:11,480 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:11,481 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-01 08:18:11,482 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:18:11,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711444771] [2021-05-01 08:18:11,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [711444771] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:18:11,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:18:11,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-01 08:18:11,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970339400] [2021-05-01 08:18:11,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-01 08:18:11,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:18:11,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-01 08:18:11,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-01 08:18:11,484 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 6 states have internal predecessors, (32), 5 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-01 08:18:12,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:18:12,287 INFO L93 Difference]: Finished difference Result 165 states and 211 transitions. [2021-05-01 08:18:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-01 08:18:12,288 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 6 states have internal predecessors, (32), 5 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-01 08:18:12,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:18:12,290 INFO L225 Difference]: With dead ends: 165 [2021-05-01 08:18:12,290 INFO L226 Difference]: Without dead ends: 97 [2021-05-01 08:18:12,292 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-05-01 08:18:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-01 08:18:12,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2021-05-01 08:18:12,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 58 states have internal predecessors, (65), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2021-05-01 08:18:12,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2021-05-01 08:18:12,307 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 56 [2021-05-01 08:18:12,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:18:12,307 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2021-05-01 08:18:12,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 6 states have internal predecessors, (32), 5 states have call successors, (12), 7 states have call predecessors, (12), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-01 08:18:12,307 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2021-05-01 08:18:12,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-01 08:18:12,309 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:18:12,309 INFO L519 BasicCegarLoop]: trace histogram [3, 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] [2021-05-01 08:18:12,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:18:12,309 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:18:12,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:18:12,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1976466705, now seen corresponding path program 1 times [2021-05-01 08:18:12,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:18:12,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029369963] [2021-05-01 08:18:12,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:18:12,312 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:18:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:12,364 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:12,365 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,366 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:18:12,368 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,368 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:18:12,371 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,371 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:18:12,375 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,375 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:12,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:18:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:12,401 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,401 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:12,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-05-01 08:18:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:12,432 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,433 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-05-01 08:18:12,442 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,443 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-05-01 08:18:12,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-05-01 08:18:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:12,457 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,458 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:12,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:18:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:12,461 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,461 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:12,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-01 08:18:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:12,465 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,465 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:18:12,473 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,473 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:18:12,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-01 08:18:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:12,500 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,501 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:12,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-05-01 08:18:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:12,505 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,505 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:12,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-01 08:18:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:12,507 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,507 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:12,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-01 08:18:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:12,510 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,510 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:12,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-01 08:18:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:12,523 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,524 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:12,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-05-01 08:18:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:12,540 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:12,541 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-01 08:18:12,541 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:18:12,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029369963] [2021-05-01 08:18:12,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2029369963] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:18:12,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:18:12,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-01 08:18:12,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338598573] [2021-05-01 08:18:12,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-01 08:18:12,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:18:12,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-01 08:18:12,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-01 08:18:12,544 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-01 08:18:13,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:18:13,163 INFO L93 Difference]: Finished difference Result 164 states and 210 transitions. [2021-05-01 08:18:13,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-01 08:18:13,163 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2021-05-01 08:18:13,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:18:13,167 INFO L225 Difference]: With dead ends: 164 [2021-05-01 08:18:13,167 INFO L226 Difference]: Without dead ends: 99 [2021-05-01 08:18:13,168 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 238.2ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-05-01 08:18:13,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-01 08:18:13,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-05-01 08:18:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 60 states have internal predecessors, (66), 25 states have call successors, (25), 11 states have call predecessors, (25), 12 states have return successors, (30), 23 states have call predecessors, (30), 23 states have call successors, (30) [2021-05-01 08:18:13,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2021-05-01 08:18:13,185 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 66 [2021-05-01 08:18:13,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:18:13,185 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2021-05-01 08:18:13,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (14), 7 states have call predecessors, (14), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-01 08:18:13,185 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2021-05-01 08:18:13,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-01 08:18:13,186 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:18:13,187 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-05-01 08:18:13,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 08:18:13,187 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:18:13,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:18:13,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1818938389, now seen corresponding path program 1 times [2021-05-01 08:18:13,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:18:13,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367113292] [2021-05-01 08:18:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:18:13,190 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:18:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:13,225 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,225 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:13,226 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,226 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:18:13,228 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,229 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:18:13,231 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,231 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:18:13,234 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,235 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:18:13,239 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,240 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:13,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:18:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:13,262 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:13,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-05-01 08:18:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:13,287 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,287 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:18:13,294 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,295 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:18:13,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-05-01 08:18:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:13,308 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,308 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:13,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:18:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:13,313 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,313 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:13,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-01 08:18:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:13,329 INFO L142 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-05-01 08:18:13,329 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:18:13,340 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,341 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-01 08:18:13,368 INFO L142 QuantifierPusher]: treesize reduction 4, result has 69.2 percent of original size [2021-05-01 08:18:13,369 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-05-01 08:18:13,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-05-01 08:18:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:13,386 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,386 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:13,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-01 08:18:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:13,389 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:13,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-01 08:18:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:13,397 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,398 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:13,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-05-01 08:18:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:13,401 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,401 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:13,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-01 08:18:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:13,404 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,404 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:13,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-05-01 08:18:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:13,407 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,407 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:13,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-05-01 08:18:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:13,427 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,428 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:18:13,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-05-01 08:18:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:18:13,451 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,452 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:18:13,464 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:18:13,464 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:18:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-01 08:18:13,476 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:18:13,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367113292] [2021-05-01 08:18:13,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [367113292] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:18:13,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:18:13,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-01 08:18:13,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029555876] [2021-05-01 08:18:13,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-01 08:18:13,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:18:13,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-01 08:18:13,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-01 08:18:13,478 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 8 states have call successors, (16), 7 states have call predecessors, (16), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-01 08:18:14,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:18:14,447 INFO L93 Difference]: Finished difference Result 152 states and 194 transitions. [2021-05-01 08:18:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-01 08:18:14,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 8 states have call successors, (16), 7 states have call predecessors, (16), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 79 [2021-05-01 08:18:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:18:14,453 INFO L225 Difference]: With dead ends: 152 [2021-05-01 08:18:14,453 INFO L226 Difference]: Without dead ends: 99 [2021-05-01 08:18:14,455 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 520.6ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-05-01 08:18:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-01 08:18:14,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2021-05-01 08:18:14,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 62 states have internal predecessors, (67), 25 states have call successors, (25), 11 states have call predecessors, (25), 13 states have return successors, (33), 23 states have call predecessors, (33), 23 states have call successors, (33) [2021-05-01 08:18:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2021-05-01 08:18:14,478 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 79 [2021-05-01 08:18:14,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:18:14,479 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2021-05-01 08:18:14,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 8 states have call successors, (16), 7 states have call predecessors, (16), 4 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-01 08:18:14,479 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2021-05-01 08:18:14,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-01 08:18:14,485 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:18:14,485 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-05-01 08:18:14,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-01 08:18:14,485 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:18:14,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:18:14,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1854783018, now seen corresponding path program 1 times [2021-05-01 08:18:14,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:18:14,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284034160] [2021-05-01 08:18:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:18:14,488 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:18:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 08:18:14,525 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 08:18:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 08:18:14,564 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 08:18:14,596 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-01 08:18:14,597 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:18:14,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-01 08:18:14,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:18:14 BoogieIcfgContainer [2021-05-01 08:18:14,625 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:18:14,628 INFO L168 Benchmark]: Toolchain (without parser) took 5845.66 ms. Allocated memory was 181.4 MB in the beginning and 273.7 MB in the end (delta: 92.3 MB). Free memory was 147.0 MB in the beginning and 196.3 MB in the end (delta: -49.3 MB). Peak memory consumption was 44.5 MB. Max. memory is 8.0 GB. [2021-05-01 08:18:14,629 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 181.4 MB. Free memory was 164.3 MB in the beginning and 164.2 MB in the end (delta: 105.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:18:14,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.50 ms. Allocated memory is still 181.4 MB. Free memory was 146.7 MB in the beginning and 163.2 MB in the end (delta: -16.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. [2021-05-01 08:18:14,631 INFO L168 Benchmark]: Boogie Preprocessor took 65.78 ms. Allocated memory is still 181.4 MB. Free memory was 163.2 MB in the beginning and 161.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:18:14,631 INFO L168 Benchmark]: RCFGBuilder took 651.22 ms. Allocated memory is still 181.4 MB. Free memory was 161.1 MB in the beginning and 125.8 MB in the end (delta: 35.3 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:18:14,631 INFO L168 Benchmark]: TraceAbstraction took 4842.65 ms. Allocated memory was 181.4 MB in the beginning and 273.7 MB in the end (delta: 92.3 MB). Free memory was 125.8 MB in the beginning and 196.3 MB in the end (delta: -70.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:18:14,637 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 181.4 MB. Free memory was 164.3 MB in the beginning and 164.2 MB in the end (delta: 105.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 280.50 ms. Allocated memory is still 181.4 MB. Free memory was 146.7 MB in the beginning and 163.2 MB in the end (delta: -16.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 65.78 ms. Allocated memory is still 181.4 MB. Free memory was 163.2 MB in the beginning and 161.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 651.22 ms. Allocated memory is still 181.4 MB. Free memory was 161.1 MB in the beginning and 125.8 MB in the end (delta: 35.3 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4842.65 ms. Allocated memory was 181.4 MB in the beginning and 273.7 MB in the end (delta: 92.3 MB). Free memory was 125.8 MB in the beginning and 196.3 MB in the end (delta: -70.5 MB). Peak memory consumption was 23.1 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, 101 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4767.4ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 23.4ms, AutomataDifference: 3172.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 344 SDtfs, 659 SDslu, 1525 SDs, 0 SdLazy, 2163 SolverSat, 606 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1513.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 152 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1399.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=0, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 84.5ms AutomataMinimizationTime, 4 MinimizatonAttempts, 17 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...