/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 22:59:03,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 22:59:03,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 22:59:03,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 22:59:03,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 22:59:03,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 22:59:03,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 22:59:03,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 22:59:03,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 22:59:03,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 22:59:03,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 22:59:03,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 22:59:03,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 22:59:03,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 22:59:03,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 22:59:03,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 22:59:03,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 22:59:03,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 22:59:03,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 22:59:03,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 22:59:03,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 22:59:03,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 22:59:03,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 22:59:03,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 22:59:03,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 22:59:03,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 22:59:03,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 22:59:03,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 22:59:03,897 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 22:59:03,917 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 22:59:03,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 22:59:03,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 22:59:03,924 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 22:59:03,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 22:59:03,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 22:59:03,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 22:59:03,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 22:59:03,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 22:59:03,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 22:59:03,927 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 22:59:03,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 22:59:03,927 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 22:59:03,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 22:59:03,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 22:59:03,928 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 22:59:03,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 22:59:03,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 22:59:03,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:59:03,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 22:59:03,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 22:59:03,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 22:59:03,929 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 22:59:04,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 22:59:04,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 22:59:04,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 22:59:04,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 22:59:04,483 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 22:59:04,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec.c [2021-02-23 22:59:04,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8303bc57d/029a8e4d387a48b7a016cda2ba0eac7c/FLAG56400cf9f [2021-02-23 22:59:05,441 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 22:59:05,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c [2021-02-23 22:59:05,455 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8303bc57d/029a8e4d387a48b7a016cda2ba0eac7c/FLAG56400cf9f [2021-02-23 22:59:05,729 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8303bc57d/029a8e4d387a48b7a016cda2ba0eac7c [2021-02-23 22:59:05,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 22:59:05,748 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 22:59:05,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 22:59:05,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 22:59:05,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 22:59:05,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:59:05" (1/1) ... [2021-02-23 22:59:05,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@98a6c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:59:05, skipping insertion in model container [2021-02-23 22:59:05,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:59:05" (1/1) ... [2021-02-23 22:59:05,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 22:59:05,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 22:59:05,959 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c[585,598] [2021-02-23 22:59:05,980 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-23 22:59:05,982 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-23 22:59:06,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:59:06,017 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 22:59:06,033 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c[585,598] [2021-02-23 22:59:06,040 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-23 22:59:06,042 WARN L1501 CHandler]: Possible shadowing of function min [2021-02-23 22:59:06,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:59:06,085 INFO L208 MainTranslator]: Completed translation [2021-02-23 22:59:06,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:59:06 WrapperNode [2021-02-23 22:59:06,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 22:59:06,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 22:59:06,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 22:59:06,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 22:59:06,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:59:06" (1/1) ... [2021-02-23 22:59:06,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:59:06" (1/1) ... [2021-02-23 22:59:06,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:59:06" (1/1) ... [2021-02-23 22:59:06,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:59:06" (1/1) ... [2021-02-23 22:59:06,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:59:06" (1/1) ... [2021-02-23 22:59:06,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:59:06" (1/1) ... [2021-02-23 22:59:06,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:59:06" (1/1) ... [2021-02-23 22:59:06,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 22:59:06,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 22:59:06,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 22:59:06,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 22:59:06,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:59:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:59:06,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 22:59:06,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 22:59:06,264 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2021-02-23 22:59:06,264 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 22:59:06,264 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 22:59:06,264 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-02-23 22:59:06,264 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-02-23 22:59:06,265 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2021-02-23 22:59:06,265 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-02-23 22:59:06,265 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-02-23 22:59:06,265 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2021-02-23 22:59:06,265 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 22:59:06,266 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-02-23 22:59:06,266 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-23 22:59:06,266 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 22:59:06,266 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 22:59:06,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 22:59:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 22:59:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2021-02-23 22:59:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 22:59:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 22:59:06,267 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 22:59:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 22:59:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 22:59:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-02-23 22:59:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 22:59:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 22:59:06,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 22:59:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-02-23 22:59:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 22:59:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 22:59:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2021-02-23 22:59:06,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 22:59:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-02-23 22:59:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-02-23 22:59:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure task [2021-02-23 22:59:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-02-23 22:59:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 22:59:06,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 22:59:06,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 22:59:06,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 22:59:07,235 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 22:59:07,236 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-23 22:59:07,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:59:07 BoogieIcfgContainer [2021-02-23 22:59:07,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 22:59:07,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 22:59:07,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 22:59:07,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 22:59:07,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:59:05" (1/3) ... [2021-02-23 22:59:07,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b0d63b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:59:07, skipping insertion in model container [2021-02-23 22:59:07,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:59:06" (2/3) ... [2021-02-23 22:59:07,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b0d63b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:59:07, skipping insertion in model container [2021-02-23 22:59:07,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:59:07" (3/3) ... [2021-02-23 22:59:07,255 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2021-02-23 22:59:07,264 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 22:59:07,270 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 22:59:07,296 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 22:59:07,344 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 22:59:07,345 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 22:59:07,345 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 22:59:07,345 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 22:59:07,345 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 22:59:07,345 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 22:59:07,346 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 22:59:07,346 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 22:59:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states. [2021-02-23 22:59:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-23 22:59:07,407 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:59:07,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:59:07,409 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:59:07,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:59:07,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1130694089, now seen corresponding path program 1 times [2021-02-23 22:59:07,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:59:07,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224492845] [2021-02-23 22:59:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:59:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:07,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:07,808 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:07,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:07,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:59:07,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:07,828 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:59:07,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:07,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:07,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:59:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:07,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:07,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:07,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 22:59:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:07,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:07,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:08,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 22:59:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:08,006 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:08,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:08,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-23 22:59:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:08,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:08,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:08,021 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:08,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:59:08,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-02-23 22:59:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:08,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:08,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:59:08,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:08,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:59:08,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-02-23 22:59:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:08,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:08,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:08,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-02-23 22:59:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:08,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:08,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 22:59:08,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224492845] [2021-02-23 22:59:08,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:59:08,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 22:59:08,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499452721] [2021-02-23 22:59:08,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 22:59:08,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:59:08,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 22:59:08,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-23 22:59:08,249 INFO L87 Difference]: Start difference. First operand 196 states. Second operand 11 states. [2021-02-23 22:59:09,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:59:09,626 INFO L93 Difference]: Finished difference Result 339 states and 397 transitions. [2021-02-23 22:59:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 22:59:09,628 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2021-02-23 22:59:09,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:59:09,646 INFO L225 Difference]: With dead ends: 339 [2021-02-23 22:59:09,646 INFO L226 Difference]: Without dead ends: 198 [2021-02-23 22:59:09,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-02-23 22:59:09,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-02-23 22:59:09,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 185. [2021-02-23 22:59:09,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-02-23 22:59:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 209 transitions. [2021-02-23 22:59:09,764 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 209 transitions. Word has length 65 [2021-02-23 22:59:09,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:59:09,765 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 209 transitions. [2021-02-23 22:59:09,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 22:59:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 209 transitions. [2021-02-23 22:59:09,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-02-23 22:59:09,770 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:59:09,770 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:59:09,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 22:59:09,771 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:59:09,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:59:09,772 INFO L82 PathProgramCache]: Analyzing trace with hash 130793923, now seen corresponding path program 1 times [2021-02-23 22:59:09,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:59:09,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942566813] [2021-02-23 22:59:09,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:59:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:09,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:09,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:09,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:09,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:59:09,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:09,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:59:09,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:09,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:59:09,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:09,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:09,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:59:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:09,914 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:09,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:09,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 22:59:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:09,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:09,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:09,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:09,979 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 22:59:09,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-23 22:59:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:10,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:10,019 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:10,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-23 22:59:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:10,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:10,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:59:10,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:10,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 22:59:10,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:59:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:10,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:10,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:10,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:59:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:10,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:10,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:10,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-23 22:59:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:10,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:10,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:10,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-02-23 22:59:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:10,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:10,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:10,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-02-23 22:59:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:10,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:10,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-23 22:59:10,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942566813] [2021-02-23 22:59:10,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:59:10,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-23 22:59:10,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733580967] [2021-02-23 22:59:10,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 22:59:10,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:59:10,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 22:59:10,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-02-23 22:59:10,254 INFO L87 Difference]: Start difference. First operand 185 states and 209 transitions. Second operand 12 states. [2021-02-23 22:59:11,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:59:11,838 INFO L93 Difference]: Finished difference Result 326 states and 372 transitions. [2021-02-23 22:59:11,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 22:59:11,839 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2021-02-23 22:59:11,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:59:11,843 INFO L225 Difference]: With dead ends: 326 [2021-02-23 22:59:11,843 INFO L226 Difference]: Without dead ends: 197 [2021-02-23 22:59:11,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-02-23 22:59:11,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-02-23 22:59:11,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2021-02-23 22:59:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-02-23 22:59:11,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 212 transitions. [2021-02-23 22:59:11,896 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 212 transitions. Word has length 85 [2021-02-23 22:59:11,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:59:11,897 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 212 transitions. [2021-02-23 22:59:11,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 22:59:11,897 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 212 transitions. [2021-02-23 22:59:11,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-02-23 22:59:11,902 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:59:11,902 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:59:11,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 22:59:11,903 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:59:11,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:59:11,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1555460186, now seen corresponding path program 1 times [2021-02-23 22:59:11,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:59:11,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265020516] [2021-02-23 22:59:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:59:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:11,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:11,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:11,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:11,961 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:59:11,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:11,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:59:11,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:11,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:59:11,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:11,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:12,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:59:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:12,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:12,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:12,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 22:59:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:12,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:12,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:12,094 WARN L141 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-02-23 22:59:12,095 WARN L147 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size 9 [2021-02-23 22:59:12,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:12,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 22:59:12,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:12,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 22:59:12,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-23 22:59:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:12,153 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:12,154 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:12,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 22:59:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:12,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:12,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:12,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-23 22:59:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:12,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:12,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:59:12,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:12,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:59:12,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-02-23 22:59:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:12,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:12,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:12,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:59:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:12,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:12,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:12,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:59:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:12,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:12,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:12,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-02-23 22:59:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:12,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:12,220 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:12,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-02-23 22:59:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:12,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:12,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:12,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-23 22:59:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:12,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:12,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-02-23 22:59:12,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265020516] [2021-02-23 22:59:12,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:59:12,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-23 22:59:12,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670103544] [2021-02-23 22:59:12,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 22:59:12,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:59:12,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 22:59:12,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-02-23 22:59:12,293 INFO L87 Difference]: Start difference. First operand 187 states and 212 transitions. Second operand 14 states. [2021-02-23 22:59:13,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:59:13,792 INFO L93 Difference]: Finished difference Result 325 states and 371 transitions. [2021-02-23 22:59:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-23 22:59:13,793 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 106 [2021-02-23 22:59:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:59:13,798 INFO L225 Difference]: With dead ends: 325 [2021-02-23 22:59:13,798 INFO L226 Difference]: Without dead ends: 199 [2021-02-23 22:59:13,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-02-23 22:59:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-23 22:59:13,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 189. [2021-02-23 22:59:13,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2021-02-23 22:59:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 215 transitions. [2021-02-23 22:59:13,868 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 215 transitions. Word has length 106 [2021-02-23 22:59:13,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:59:13,869 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 215 transitions. [2021-02-23 22:59:13,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 22:59:13,869 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 215 transitions. [2021-02-23 22:59:13,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-02-23 22:59:13,871 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:59:13,872 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:59:13,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 22:59:13,872 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:59:13,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:59:13,873 INFO L82 PathProgramCache]: Analyzing trace with hash 306608542, now seen corresponding path program 1 times [2021-02-23 22:59:13,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:59:13,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183371793] [2021-02-23 22:59:13,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:59:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:13,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:13,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:13,989 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:13,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:59:13,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:13,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:59:14,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:59:14,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:59:14,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:14,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:59:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:14,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:14,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-02-23 22:59:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:14,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:14,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,100 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:59:14,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:59:14,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:59:14,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-23 22:59:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:14,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:14,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 22:59:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:14,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:14,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-02-23 22:59:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:14,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,199 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:59:14,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,219 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 22:59:14,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-23 22:59:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:14,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:14,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-23 22:59:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:14,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:14,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-02-23 22:59:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:14,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:14,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 22:59:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:14,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,267 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:14,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 22:59:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:14,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:14,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-02-23 22:59:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:14,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:14,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-02-23 22:59:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:14,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:59:14,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-02-23 22:59:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:59:14,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:59:14,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:59:14,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:59:14,395 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-02-23 22:59:14,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183371793] [2021-02-23 22:59:14,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:59:14,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-02-23 22:59:14,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602157076] [2021-02-23 22:59:14,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 22:59:14,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:59:14,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 22:59:14,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-02-23 22:59:14,398 INFO L87 Difference]: Start difference. First operand 189 states and 215 transitions. Second operand 17 states. [2021-02-23 22:59:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:59:16,483 INFO L93 Difference]: Finished difference Result 308 states and 350 transitions. [2021-02-23 22:59:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 22:59:16,484 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 132 [2021-02-23 22:59:16,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:59:16,489 INFO L225 Difference]: With dead ends: 308 [2021-02-23 22:59:16,489 INFO L226 Difference]: Without dead ends: 199 [2021-02-23 22:59:16,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-02-23 22:59:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-23 22:59:16,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 191. [2021-02-23 22:59:16,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-02-23 22:59:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 218 transitions. [2021-02-23 22:59:16,536 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 218 transitions. Word has length 132 [2021-02-23 22:59:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:59:16,537 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 218 transitions. [2021-02-23 22:59:16,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 22:59:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 218 transitions. [2021-02-23 22:59:16,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-02-23 22:59:16,540 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:59:16,540 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:59:16,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 22:59:16,541 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:59:16,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:59:16,541 INFO L82 PathProgramCache]: Analyzing trace with hash -296143499, now seen corresponding path program 1 times [2021-02-23 22:59:16,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:59:16,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641844667] [2021-02-23 22:59:16,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:59:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:59:16,588 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:59:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:59:16,653 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:59:16,754 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 22:59:16,754 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 22:59:16,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 22:59:16,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:59:16 BoogieIcfgContainer [2021-02-23 22:59:16,866 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 22:59:16,867 INFO L168 Benchmark]: Toolchain (without parser) took 11131.76 ms. Allocated memory was 173.0 MB in the beginning and 325.1 MB in the end (delta: 152.0 MB). Free memory was 149.7 MB in the beginning and 181.5 MB in the end (delta: -31.8 MB). Peak memory consumption was 120.5 MB. Max. memory is 8.0 GB. [2021-02-23 22:59:16,868 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 173.0 MB. Free memory is still 145.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 22:59:16,868 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.73 ms. Allocated memory is still 173.0 MB. Free memory was 148.5 MB in the beginning and 136.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-02-23 22:59:16,869 INFO L168 Benchmark]: Boogie Preprocessor took 62.42 ms. Allocated memory is still 173.0 MB. Free memory was 136.7 MB in the beginning and 134.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 22:59:16,869 INFO L168 Benchmark]: RCFGBuilder took 1090.50 ms. Allocated memory is still 173.0 MB. Free memory was 134.4 MB in the beginning and 126.9 MB in the end (delta: 7.5 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. [2021-02-23 22:59:16,870 INFO L168 Benchmark]: TraceAbstraction took 9621.75 ms. Allocated memory was 173.0 MB in the beginning and 325.1 MB in the end (delta: 152.0 MB). Free memory was 126.7 MB in the beginning and 181.5 MB in the end (delta: -54.7 MB). Peak memory consumption was 98.4 MB. Max. memory is 8.0 GB. [2021-02-23 22:59:16,873 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 173.0 MB. Free memory is still 145.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 335.73 ms. Allocated memory is still 173.0 MB. Free memory was 148.5 MB in the beginning and 136.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 62.42 ms. Allocated memory is still 173.0 MB. Free memory was 136.7 MB in the beginning and 134.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1090.50 ms. Allocated memory is still 173.0 MB. Free memory was 134.4 MB in the beginning and 126.9 MB in the end (delta: 7.5 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9621.75 ms. Allocated memory was 173.0 MB in the beginning and 325.1 MB in the end (delta: 152.0 MB). Free memory was 126.7 MB in the beginning and 181.5 MB in the end (delta: -54.7 MB). Peak memory consumption was 98.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L102] CALL, EXPR nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) VAL [__VERIFIER_nondet_bool()=0] [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}] [L29] n->data = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=2147483647, malloc(sizeof(struct node))={-1:0}, n={-1:0}] [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() VAL [__VERIFIER_nondet_bool()=1] [L26] return 0; VAL [\result={0:0}] [L30] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L30] n->left = nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() VAL [__VERIFIER_nondet_bool()=1] [L26] return 0; VAL [\result={0:0}] [L31] RET, EXPR nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() VAL [malloc(sizeof(struct node))={-1:0}, n={-1:0}, nondet_tree()={0:0}] [L32] return n; VAL [\result={-1:0}, malloc(sizeof(struct node))={-1:0}, n={-1:0}] [L102] RET, EXPR nondet_tree() VAL [nondet_tree()={-1:0}] [L102] CALL task(nondet_tree()) VAL [t={-1:0}] [L78] CALL, EXPR min(t) VAL [n={-1:0}] [L37] COND FALSE !(!n) VAL [n={-1:0}, n={-1:0}] [L40] EXPR n->data VAL [n={-1:0}, n={-1:0}, n->data=2147483647] [L40] int a = n->data; VAL [a=2147483647, n={-1:0}, n={-1:0}, n->data=2147483647] [L41] EXPR n->left VAL [a=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L41] CALL, EXPR min(n->left) VAL [n={0:0}] [L37] COND TRUE !n VAL [n={0:0}, n={0:0}] [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L41] RET, EXPR min(n->left) VAL [a=2147483647, min(n->left)=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L41] int b = min(n->left); VAL [a=2147483647, b=2147483647, min(n->left)=2147483647, n={-1:0}, n={-1:0}, n->left={0:0}] [L42] EXPR n->right VAL [a=2147483647, b=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L42] CALL, EXPR min(n->right) VAL [n={0:0}] [L37] COND TRUE !n VAL [n={0:0}, n={0:0}] [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L42] RET, EXPR min(n->right) VAL [a=2147483647, b=2147483647, min(n->right)=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L42] int c = min(n->right); VAL [a=2147483647, b=2147483647, c=2147483647, min(n->right)=2147483647, n={-1:0}, n={-1:0}, n->right={0:0}] [L43] COND TRUE b <= a && b <= c VAL [a=2147483647, b=2147483647, c=2147483647, n={-1:0}, n={-1:0}] [L43] return b; VAL [\result=2147483647, a=2147483647, b=2147483647, c=2147483647, n={-1:0}, n={-1:0}] [L78] RET, EXPR min(t) VAL [min(t)=2147483647, t={-1:0}, t={-1:0}] [L78] int a = min(t); VAL [a=2147483647, min(t)=2147483647, t={-1:0}, t={-1:0}] [L79] int b; VAL [a=2147483647, b={3:0}, t={-1:0}, t={-1:0}] [L81] CALL, EXPR size(t) VAL [t={-1:0}] [L73] COND FALSE !(!t) VAL [t={-1:0}, t={-1:0}] [L74] EXPR t->left VAL [t={-1:0}, t={-1:0}, t->left={0:0}] [L74] CALL, EXPR size(t->left) VAL [t={0:0}] [L73] COND TRUE !t VAL [t={0:0}, t={0:0}] [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->left) VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}] [L74] EXPR t->right VAL [size(t->left)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L74] CALL, EXPR size(t->right) VAL [t={0:0}] [L73] COND TRUE !t VAL [t={0:0}, t={0:0}] [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L74] return size(t->left) + size(t->right) + 1; VAL [\result=1, size(t->left)=0, size(t->right)=0, t={-1:0}, t={-1:0}, t->left={0:0}, t->right={0:0}] [L81] RET, EXPR size(t) VAL [a=2147483647, b={3:0}, size(t)=1, t={-1:0}, t={-1:0}] [L81] int n = size(t); VAL [a=2147483647, b={3:0}, n=1, size(t)=1, t={-1:0}, t={-1:0}] [L82] CALL assume_cycle_if_not(n != 0) VAL [\old(cond)=1] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L82] RET assume_cycle_if_not(n != 0) VAL [a=2147483647, b={3:0}, n=1, t={-1:0}, t={-1:0}] [L83] EXPR, FCALL calloc(n, sizeof(int)) VAL [a=2147483647, b={3:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}] [L83] int *x = calloc(n, sizeof(int)); VAL [a=2147483647, b={3:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}, x={-2:0}] [L84] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-2:0}, t={-1:0}] [L62] COND FALSE !(!t) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}] [L65] EXPR t->left VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}] [L65] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, t={0:0}] [L62] COND TRUE !t VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}] [L63] return i; VAL [\old(i)=1, \result=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}] [L65] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L65] i = tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L66] EXPR i++ VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, i++=1, t={-1:0}, t={-1:0}] [L66] EXPR t->data VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, i++=1, t={-1:0}, t={-1:0}, t->data=2147483647] [L66] a[i++] = t->data VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, i++=1, t={-1:0}, t={-1:0}, t->data=2147483647] [L67] EXPR t->right VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}] [L67] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-2:0}, t={0:0}] [L62] COND TRUE !t VAL [\old(i)=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}] [L63] return i; VAL [\old(i)=2, \result=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}] [L67] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L67] i = tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L68] return i; VAL [\old(i)=1, \result=2, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}] [L84] RET tree_inorder(t, x, n) VAL [a=2147483647, b={3:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}, tree_inorder(t, x, n)=2, x={-2:0}] [L85] EXPR x[0] VAL [a=2147483647, b={3:0}, calloc(n, sizeof(int))={-2:0}, n=1, t={-1:0}, t={-1:0}, x={-2:0}, x[0]=0] [L85] CALL __VERIFIER_assert(a == x[0]) VAL [\old(cond)=0] [L16] COND TRUE !cond VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 13 procedures, 199 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.4s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 697 SDtfs, 1402 SDslu, 2494 SDs, 0 SdLazy, 4527 SolverSat, 528 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=196occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 4 MinimizatonAttempts, 41 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 552 NumberOfCodeBlocks, 552 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 384 ConstructedInterpolants, 0 QuantifiedInterpolants, 135578 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 70/74 InterpolantCoveringCapability, 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...