/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 12:21:15,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:21:15,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:21:15,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 12:21:15,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 12:21:15,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 12:21:15,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 12:21:15,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 12:21:15,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 12:21:15,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 12:21:15,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 12:21:15,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 12:21:15,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 12:21:15,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 12:21:15,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 12:21:15,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 12:21:15,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 12:21:15,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 12:21:15,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 12:21:15,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 12:21:15,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 12:21:15,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 12:21:15,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 12:21:15,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 12:21:15,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 12:21:15,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 12:21:15,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 12:21:15,297 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 12:21:15,298 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 12:21:15,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-05-06 12:21:15,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:21:15,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:21:15,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:21:15,308 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 12:21:15,318 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:21:15,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:21:15,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:21:15,321 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:21:15,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:21:15,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:21:15,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:21:15,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:21:15,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:21:15,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:21:15,322 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:21:15,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:21:15,323 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:21:15,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:21:15,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:21:15,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:21:15,323 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:21:15,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:21:15,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:21:15,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:21:15,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:21:15,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:21:15,324 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:21:15,324 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:21:15,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:21:15,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:21:15,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:21:15,688 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:21:15,689 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:21:15,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2021-05-06 12:21:15,734 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4e283c3f/db98d987298840d2925485c06fdedb63/FLAG57772c67a [2021-05-06 12:21:16,171 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:21:16,172 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2021-05-06 12:21:16,178 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4e283c3f/db98d987298840d2925485c06fdedb63/FLAG57772c67a [2021-05-06 12:21:16,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4e283c3f/db98d987298840d2925485c06fdedb63 [2021-05-06 12:21:16,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:21:16,506 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:21:16,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:21:16,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:21:16,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:21:16,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:21:16" (1/1) ... [2021-05-06 12:21:16,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3acdc689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:16, skipping insertion in model container [2021-05-06 12:21:16,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:21:16" (1/1) ... [2021-05-06 12:21:16,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:21:16,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:21:16,621 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_incorrect.c[619,632] [2021-05-06 12:21:16,631 WARN L1507 CHandler]: Possible shadowing of function min [2021-05-06 12:21:16,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:21:16,657 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:21:16,664 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_incorrect.c[619,632] [2021-05-06 12:21:16,713 WARN L1507 CHandler]: Possible shadowing of function min [2021-05-06 12:21:16,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:21:16,739 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:21:16,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:16 WrapperNode [2021-05-06 12:21:16,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:21:16,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:21:16,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:21:16,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:21:16,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:16" (1/1) ... [2021-05-06 12:21:16,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:16" (1/1) ... [2021-05-06 12:21:16,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:16" (1/1) ... [2021-05-06 12:21:16,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:16" (1/1) ... [2021-05-06 12:21:16,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:16" (1/1) ... [2021-05-06 12:21:16,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:16" (1/1) ... [2021-05-06 12:21:16,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:16" (1/1) ... [2021-05-06 12:21:16,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:21:16,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:21:16,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:21:16,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:21:16,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:16" (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 [2021-05-06 12:21:16,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:21:16,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:21:16,812 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:21:16,813 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:21:16,813 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:21:16,813 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-05-06 12:21:16,813 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-05-06 12:21:16,813 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-05-06 12:21:16,813 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-05-06 12:21:16,813 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-05-06 12:21:16,814 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-05-06 12:21:16,814 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:21:16,814 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-05-06 12:21:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-05-06 12:21:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-05-06 12:21:16,815 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-05-06 12:21:16,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 12:21:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-06 12:21:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:21:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:21:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:21:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:21:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:21:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:21:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-05-06 12:21:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-05-06 12:21:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:21:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-05-06 12:21:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-05-06 12:21:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-05-06 12:21:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-05-06 12:21:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:21:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:21:16,818 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-05-06 12:21:16,818 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-05-06 12:21:16,818 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-05-06 12:21:16,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-05-06 12:21:16,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:21:16,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:21:16,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:21:16,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:21:17,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:21:17,136 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 12:21:17,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:21:17 BoogieIcfgContainer [2021-05-06 12:21:17,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:21:17,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:21:17,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:21:17,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:21:17,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:21:16" (1/3) ... [2021-05-06 12:21:17,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69352ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:21:17, skipping insertion in model container [2021-05-06 12:21:17,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:16" (2/3) ... [2021-05-06 12:21:17,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69352ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:21:17, skipping insertion in model container [2021-05-06 12:21:17,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:21:17" (3/3) ... [2021-05-06 12:21:17,142 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2021-05-06 12:21:17,145 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:21:17,147 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:21:17,157 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:21:17,170 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:21:17,170 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:21:17,170 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:21:17,170 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:21:17,170 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:21:17,170 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:21:17,170 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:21:17,170 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:21:17,180 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 59 states have internal predecessors, (71), 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) [2021-05-06 12:21:17,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 12:21:17,186 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:21:17,186 INFO L523 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] [2021-05-06 12:21:17,187 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:21:17,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:21:17,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1536185801, now seen corresponding path program 1 times [2021-05-06 12:21:17,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:21:17,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113832768] [2021-05-06 12:21:17,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:21:17,231 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:21:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:17,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:21:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:17,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-05-06 12:21:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:17,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 12:21:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:17,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 12:21:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:17,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-06 12:21:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:17,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-06 12:21:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:17,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-05-06 12:21:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:21:17,489 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:21:17,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113832768] [2021-05-06 12:21:17,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2113832768] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:21:17,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:21:17,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 12:21:17,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096748516] [2021-05-06 12:21:17,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 12:21:17,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:21:17,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 12:21:17,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 12:21:17,507 INFO L87 Difference]: Start difference. First operand has 96 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 59 states have internal predecessors, (71), 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 6 states, 6 states have (on average 4.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 12:21:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:21:17,889 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2021-05-06 12:21:17,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 12:21:17,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-05-06 12:21:17,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:21:17,897 INFO L225 Difference]: With dead ends: 168 [2021-05-06 12:21:17,897 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 12:21:17,899 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-06 12:21:17,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 12:21:17,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2021-05-06 12:21:17,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 25 states have call successors, (25), 11 states have call predecessors, (25), 9 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 12:21:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2021-05-06 12:21:17,930 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 44 [2021-05-06 12:21:17,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:21:17,931 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2021-05-06 12:21:17,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 12:21:17,931 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2021-05-06 12:21:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 12:21:17,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:21:17,933 INFO L523 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] [2021-05-06 12:21:17,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:21:17,933 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:21:17,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:21:17,934 INFO L82 PathProgramCache]: Analyzing trace with hash -152757941, now seen corresponding path program 1 times [2021-05-06 12:21:17,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:21:17,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815003521] [2021-05-06 12:21:17,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:21:17,936 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:21:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:17,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:21:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:18,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-05-06 12:21:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:18,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 12:21:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:18,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 12:21:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:18,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-06 12:21:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:18,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-06 12:21:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:18,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-05-06 12:21:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:21:18,068 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:21:18,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815003521] [2021-05-06 12:21:18,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1815003521] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:21:18,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:21:18,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 12:21:18,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054899571] [2021-05-06 12:21:18,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 12:21:18,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:21:18,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 12:21:18,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 12:21:18,070 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. 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) [2021-05-06 12:21:18,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:21:18,559 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2021-05-06 12:21:18,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 12:21:18,560 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 [2021-05-06 12:21:18,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:21:18,562 INFO L225 Difference]: With dead ends: 154 [2021-05-06 12:21:18,562 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 12:21:18,563 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 203.8ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-05-06 12:21:18,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 12:21:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2021-05-06 12:21:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 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) [2021-05-06 12:21:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2021-05-06 12:21:18,574 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 44 [2021-05-06 12:21:18,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:21:18,574 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2021-05-06 12:21:18,574 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) [2021-05-06 12:21:18,574 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2021-05-06 12:21:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 12:21:18,575 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:21:18,575 INFO L523 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] [2021-05-06 12:21:18,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:21:18,576 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:21:18,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:21:18,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2001282500, now seen corresponding path program 1 times [2021-05-06 12:21:18,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:21:18,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816312455] [2021-05-06 12:21:18,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:21:18,578 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:21:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:18,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:21:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:18,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-05-06 12:21:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:18,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 12:21:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:18,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 12:21:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:18,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-05-06 12:21:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:18,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-06 12:21:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:18,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-05-06 12:21:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:18,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-05-06 12:21:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:18,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-05-06 12:21:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 12:21:18,717 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:21:18,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816312455] [2021-05-06 12:21:18,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [816312455] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:21:18,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:21:18,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-06 12:21:18,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350380489] [2021-05-06 12:21:18,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 12:21:18,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:21:18,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 12:21:18,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-06 12:21:18,718 INFO L87 Difference]: Start difference. First operand 90 states and 113 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) [2021-05-06 12:21:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:21:19,285 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2021-05-06 12:21:19,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 12:21:19,286 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 [2021-05-06 12:21:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:21:19,287 INFO L225 Difference]: With dead ends: 164 [2021-05-06 12:21:19,287 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 12:21:19,288 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-05-06 12:21:19,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 12:21:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2021-05-06 12:21:19,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 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) [2021-05-06 12:21:19,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2021-05-06 12:21:19,307 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 56 [2021-05-06 12:21:19,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:21:19,307 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2021-05-06 12:21:19,307 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) [2021-05-06 12:21:19,308 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2021-05-06 12:21:19,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 12:21:19,309 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:21:19,309 INFO L523 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] [2021-05-06 12:21:19,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 12:21:19,309 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:21:19,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:21:19,310 INFO L82 PathProgramCache]: Analyzing trace with hash 921875361, now seen corresponding path program 1 times [2021-05-06 12:21:19,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:21:19,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752485713] [2021-05-06 12:21:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:21:19,311 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:21:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:19,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:21:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:19,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-05-06 12:21:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:19,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-05-06 12:21:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:19,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:21:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:19,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-06 12:21:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:19,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-06 12:21:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:19,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-05-06 12:21:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:19,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-06 12:21:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:19,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-06 12:21:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:19,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-06 12:21:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:19,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-05-06 12:21:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-06 12:21:19,473 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:21:19,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752485713] [2021-05-06 12:21:19,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [752485713] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:21:19,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:21:19,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-06 12:21:19,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943865950] [2021-05-06 12:21:19,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 12:21:19,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:21:19,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 12:21:19,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 12:21:19,474 INFO L87 Difference]: Start difference. First operand 92 states and 116 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) [2021-05-06 12:21:19,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:21:19,982 INFO L93 Difference]: Finished difference Result 163 states and 208 transitions. [2021-05-06 12:21:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 12:21:19,982 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 [2021-05-06 12:21:19,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:21:19,983 INFO L225 Difference]: With dead ends: 163 [2021-05-06 12:21:19,983 INFO L226 Difference]: Without dead ends: 98 [2021-05-06 12:21:19,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-05-06 12:21:19,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-06 12:21:19,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2021-05-06 12:21:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 59 states have internal predecessors, (64), 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) [2021-05-06 12:21:19,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2021-05-06 12:21:19,995 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 66 [2021-05-06 12:21:19,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:21:19,995 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2021-05-06 12:21:19,995 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) [2021-05-06 12:21:19,996 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2021-05-06 12:21:19,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 12:21:19,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:21:19,997 INFO L523 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] [2021-05-06 12:21:19,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 12:21:19,997 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:21:19,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:21:19,997 INFO L82 PathProgramCache]: Analyzing trace with hash 940648973, now seen corresponding path program 1 times [2021-05-06 12:21:19,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:21:19,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895886792] [2021-05-06 12:21:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:21:19,999 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:21:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:20,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:21:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:20,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-05-06 12:21:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:20,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-05-06 12:21:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:20,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:21:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:20,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-06 12:21:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:20,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-05-06 12:21:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:20,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-06 12:21:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:20,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-06 12:21:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:20,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-05-06 12:21:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:20,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-06 12:21:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:20,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-05-06 12:21:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:20,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-05-06 12:21:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:20,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-05-06 12:21:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 12:21:20,211 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:21:20,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895886792] [2021-05-06 12:21:20,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [895886792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:21:20,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:21:20,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-06 12:21:20,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793669894] [2021-05-06 12:21:20,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 12:21:20,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:21:20,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 12:21:20,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-06 12:21:20,212 INFO L87 Difference]: Start difference. First operand 94 states and 119 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) [2021-05-06 12:21:20,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:21:20,991 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2021-05-06 12:21:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 12:21:20,991 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 [2021-05-06 12:21:20,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:21:20,993 INFO L225 Difference]: With dead ends: 151 [2021-05-06 12:21:20,993 INFO L226 Difference]: Without dead ends: 98 [2021-05-06 12:21:20,993 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 436.0ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-05-06 12:21:20,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-06 12:21:21,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-05-06 12:21:21,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 61 states have internal predecessors, (65), 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) [2021-05-06 12:21:21,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2021-05-06 12:21:21,005 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 79 [2021-05-06 12:21:21,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:21:21,005 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2021-05-06 12:21:21,005 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) [2021-05-06 12:21:21,005 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2021-05-06 12:21:21,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 12:21:21,006 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:21:21,006 INFO L523 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] [2021-05-06 12:21:21,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 12:21:21,007 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:21:21,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:21:21,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1677199096, now seen corresponding path program 1 times [2021-05-06 12:21:21,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:21:21,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901086277] [2021-05-06 12:21:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:21:21,008 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:21:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 12:21:21,026 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 12:21:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 12:21:21,042 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 12:21:21,063 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-06 12:21:21,063 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 12:21:21,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-06 12:21:21,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:21:21 BoogieIcfgContainer [2021-05-06 12:21:21,075 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 12:21:21,075 INFO L168 Benchmark]: Toolchain (without parser) took 4569.04 ms. Allocated memory was 201.3 MB in the beginning and 336.6 MB in the end (delta: 135.3 MB). Free memory was 166.6 MB in the beginning and 169.3 MB in the end (delta: -2.6 MB). Peak memory consumption was 132.9 MB. Max. memory is 8.0 GB. [2021-05-06 12:21:21,076 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 201.3 MB. Free memory is still 183.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:21:21,076 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.78 ms. Allocated memory is still 201.3 MB. Free memory was 166.4 MB in the beginning and 183.3 MB in the end (delta: -16.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 12:21:21,076 INFO L168 Benchmark]: Boogie Preprocessor took 27.56 ms. Allocated memory is still 201.3 MB. Free memory was 183.3 MB in the beginning and 181.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 12:21:21,076 INFO L168 Benchmark]: RCFGBuilder took 369.32 ms. Allocated memory is still 201.3 MB. Free memory was 181.1 MB in the beginning and 147.1 MB in the end (delta: 34.0 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. [2021-05-06 12:21:21,077 INFO L168 Benchmark]: TraceAbstraction took 3936.37 ms. Allocated memory was 201.3 MB in the beginning and 336.6 MB in the end (delta: 135.3 MB). Free memory was 146.7 MB in the beginning and 169.3 MB in the end (delta: -22.6 MB). Peak memory consumption was 113.5 MB. Max. memory is 8.0 GB. [2021-05-06 12:21:21,078 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 201.3 MB. Free memory is still 183.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 231.78 ms. Allocated memory is still 201.3 MB. Free memory was 166.4 MB in the beginning and 183.3 MB in the end (delta: -16.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.56 ms. Allocated memory is still 201.3 MB. Free memory was 183.3 MB in the beginning and 181.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 369.32 ms. Allocated memory is still 201.3 MB. Free memory was 181.1 MB in the beginning and 147.1 MB in the end (delta: 34.0 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3936.37 ms. Allocated memory was 201.3 MB in the beginning and 336.6 MB in the end (delta: 135.3 MB). Free memory was 146.7 MB in the beginning and 169.3 MB in the end (delta: -22.6 MB). Peak memory consumption was 113.5 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: [L105] 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; [L105] RET, EXPR nondet_tree() [L105] CALL task(nondet_tree()) [L83] CALL, EXPR min(t) [L37] COND FALSE !(!n) [L40] EXPR n->left [L40] CALL, EXPR min(n->left) [L37] COND TRUE !n [L38] return 2147483647; [L40] RET, EXPR min(n->left) [L40] int a = min(n->left); [L41] EXPR n->right [L41] CALL, EXPR min(n->right) [L37] COND TRUE !n [L38] return 2147483647; [L41] RET, EXPR min(n->right) [L41] int b = min(n->right); [L42] COND TRUE a <= b [L42] return a; [L83] RET, EXPR min(t) [L83] int a = min(t); [L84] int b; [L86] CALL, EXPR size(t) [L78] COND FALSE !(!t) [L79] EXPR t->left [L79] CALL, EXPR size(t->left) [L78] COND TRUE !t [L78] return 0; [L79] RET, EXPR size(t->left) [L79] EXPR t->right [L79] CALL, EXPR size(t->right) [L78] COND TRUE !t [L78] return 0; [L79] RET, EXPR size(t->right) [L79] return size(t->left) + size(t->right) + 1; [L86] RET, EXPR size(t) [L86] int n = size(t); [L87] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) [L87] RET assume_abort_if_not(n != 0) [L88] EXPR, FCALL calloc(n, sizeof(int)) [L88] int *x = calloc(n, sizeof(int)); [L89] CALL tree_inorder(t, x, n) [L67] COND FALSE !(!t) [L70] EXPR t->left [L70] CALL, EXPR tree_inorder(t->left, a, i) [L67] COND TRUE !t [L68] return i; [L70] RET, EXPR tree_inorder(t->left, a, i) [L70] i = tree_inorder(t->left, a, i) [L71] EXPR i++ [L71] EXPR t->data [L71] a[i++] = t->data [L72] EXPR t->right [L72] CALL, EXPR tree_inorder(t->right, a, i) [L67] COND TRUE !t [L68] return i; [L72] RET, EXPR tree_inorder(t->right, a, i) [L72] i = tree_inorder(t->right, a, i) [L73] return i; [L89] RET tree_inorder(t, x, n) [L90] EXPR x[0] [L90] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 99 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3895.6ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 14.2ms, AutomataDifference: 2757.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 418 SDtfs, 695 SDslu, 1506 SDs, 0 SdLazy, 2233 SolverSat, 683 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1387.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 171 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1268.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=0, InterpolantAutomatonStates: 60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 74.1ms AutomataMinimizationTime, 5 MinimizatonAttempts, 24 StatesRemovedByMinimization, 5 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...