/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:31:46,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:31:46,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:31:46,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:31:46,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:31:46,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:31:46,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:31:46,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:31:46,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:31:46,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:31:46,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:31:46,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:31:46,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:31:46,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:31:46,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:31:46,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:31:46,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:31:46,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:31:46,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:31:46,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:31:46,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:31:46,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:31:46,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:31:46,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:31:46,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:31:46,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:31:46,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:31:46,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:31:46,967 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:31:46,981 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:31:46,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:31:46,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:31:46,983 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:31:46,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:31:46,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:31:46,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:31:46,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:31:46,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:31:46,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:31:46,984 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:31:46,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:31:46,985 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:31:46,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:31:46,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:31:46,985 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:31:46,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:31:46,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:31:46,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:31:46,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:31:46,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:31:46,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:31:46,987 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:31:47,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:31:47,445 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:31:47,451 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:31:47,453 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:31:47,454 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:31:47,455 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-09-04 16:31:47,560 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/422465937/30ae6bcb64fe419a874a4bcb383e8c04/FLAG6c4c8a591 [2020-09-04 16:31:48,168 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:31:48,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-09-04 16:31:48,177 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/422465937/30ae6bcb64fe419a874a4bcb383e8c04/FLAG6c4c8a591 [2020-09-04 16:31:48,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/422465937/30ae6bcb64fe419a874a4bcb383e8c04 [2020-09-04 16:31:48,486 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:31:48,488 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:31:48,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:31:48,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:31:48,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:31:48,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:31:48" (1/1) ... [2020-09-04 16:31:48,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bf2c08b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:48, skipping insertion in model container [2020-09-04 16:31:48,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:31:48" (1/1) ... [2020-09-04 16:31:48,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:31:48,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:31:48,787 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-04 16:31:48,789 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-04 16:31:48,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:31:48,838 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:31:48,947 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-04 16:31:48,949 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-04 16:31:48,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:31:48,987 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:31:48,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:48 WrapperNode [2020-09-04 16:31:48,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:31:48,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:31:48,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:31:48,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:31:49,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:48" (1/1) ... [2020-09-04 16:31:49,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:48" (1/1) ... [2020-09-04 16:31:49,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:48" (1/1) ... [2020-09-04 16:31:49,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:48" (1/1) ... [2020-09-04 16:31:49,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:48" (1/1) ... [2020-09-04 16:31:49,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:48" (1/1) ... [2020-09-04 16:31:49,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:48" (1/1) ... [2020-09-04 16:31:49,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:31:49,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:31:49,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:31:49,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:31:49,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 16:31:49,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:31:49,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:31:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 16:31:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 16:31:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-09-04 16:31:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-09-04 16:31:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-09-04 16:31:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-09-04 16:31:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-09-04 16:31:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-09-04 16:31:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:31:49,147 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-09-04 16:31:49,147 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-04 16:31:49,147 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 16:31:49,147 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 16:31:49,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:31:49,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-04 16:31:49,148 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 16:31:49,148 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 16:31:49,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:31:49,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 16:31:49,149 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-09-04 16:31:49,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 16:31:49,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 16:31:49,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 16:31:49,150 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-09-04 16:31:49,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 16:31:49,150 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-09-04 16:31:49,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 16:31:49,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 16:31:49,150 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-09-04 16:31:49,151 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-09-04 16:31:49,151 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-09-04 16:31:49,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 16:31:49,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-09-04 16:31:49,151 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:31:49,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:31:49,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:31:49,805 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:31:49,806 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 16:31:49,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:31:49 BoogieIcfgContainer [2020-09-04 16:31:49,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:31:49,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:31:49,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:31:49,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:31:49,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:31:48" (1/3) ... [2020-09-04 16:31:49,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0c7715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:31:49, skipping insertion in model container [2020-09-04 16:31:49,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:31:48" (2/3) ... [2020-09-04 16:31:49,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0c7715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:31:49, skipping insertion in model container [2020-09-04 16:31:49,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:31:49" (3/3) ... [2020-09-04 16:31:49,825 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c [2020-09-04 16:31:49,837 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:31:49,849 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:31:49,873 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:31:49,904 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:31:49,904 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:31:49,904 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:31:49,904 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:31:49,904 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:31:49,905 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:31:49,905 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:31:49,905 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:31:49,930 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states. [2020-09-04 16:31:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-04 16:31:49,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:31:49,953 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] [2020-09-04 16:31:49,953 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:31:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:31:49,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1242734485, now seen corresponding path program 1 times [2020-09-04 16:31:49,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:31:49,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696040096] [2020-09-04 16:31:49,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:31:50,047 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:31:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:50,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:31:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:50,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:31:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:50,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 16:31:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:50,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 16:31:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:50,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-04 16:31:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:50,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-04 16:31:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:50,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-04 16:31:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:31:50,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696040096] [2020-09-04 16:31:50,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:31:50,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-04 16:31:50,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864483306] [2020-09-04 16:31:50,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 16:31:50,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:31:50,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 16:31:50,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-04 16:31:50,595 INFO L87 Difference]: Start difference. First operand 183 states. Second operand 11 states. [2020-09-04 16:31:51,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:31:51,914 INFO L93 Difference]: Finished difference Result 324 states and 379 transitions. [2020-09-04 16:31:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 16:31:51,918 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-04 16:31:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:31:51,953 INFO L225 Difference]: With dead ends: 324 [2020-09-04 16:31:51,954 INFO L226 Difference]: Without dead ends: 188 [2020-09-04 16:31:51,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-04 16:31:51,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-09-04 16:31:52,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 175. [2020-09-04 16:31:52,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-09-04 16:31:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 198 transitions. [2020-09-04 16:31:52,138 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 198 transitions. Word has length 60 [2020-09-04 16:31:52,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:31:52,139 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 198 transitions. [2020-09-04 16:31:52,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 16:31:52,140 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 198 transitions. [2020-09-04 16:31:52,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-04 16:31:52,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:31:52,156 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] [2020-09-04 16:31:52,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:31:52,157 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:31:52,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:31:52,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1686429873, now seen corresponding path program 1 times [2020-09-04 16:31:52,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:31:52,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292384135] [2020-09-04 16:31:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:31:52,167 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:31:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:52,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:31:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:52,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:31:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:52,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 16:31:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:52,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 16:31:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:52,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:31:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:52,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 16:31:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:52,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-04 16:31:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:52,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-04 16:31:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:52,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-04 16:31:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 16:31:52,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292384135] [2020-09-04 16:31:52,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:31:52,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-04 16:31:52,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332949748] [2020-09-04 16:31:52,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 16:31:52,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:31:52,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 16:31:52,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-09-04 16:31:52,514 INFO L87 Difference]: Start difference. First operand 175 states and 198 transitions. Second operand 12 states. [2020-09-04 16:31:53,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:31:53,829 INFO L93 Difference]: Finished difference Result 316 states and 361 transitions. [2020-09-04 16:31:53,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 16:31:53,831 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-09-04 16:31:53,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:31:53,837 INFO L225 Difference]: With dead ends: 316 [2020-09-04 16:31:53,837 INFO L226 Difference]: Without dead ends: 187 [2020-09-04 16:31:53,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-04 16:31:53,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-04 16:31:53,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 177. [2020-09-04 16:31:53,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-04 16:31:53,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 201 transitions. [2020-09-04 16:31:53,900 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 201 transitions. Word has length 80 [2020-09-04 16:31:53,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:31:53,901 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 201 transitions. [2020-09-04 16:31:53,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 16:31:53,901 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 201 transitions. [2020-09-04 16:31:53,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-04 16:31:53,903 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:31:53,904 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] [2020-09-04 16:31:53,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:31:53,904 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:31:53,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:31:53,905 INFO L82 PathProgramCache]: Analyzing trace with hash 96122912, now seen corresponding path program 1 times [2020-09-04 16:31:53,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:31:53,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410534588] [2020-09-04 16:31:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:31:53,908 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:31:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:54,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:31:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:54,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:31:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:54,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:31:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:54,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 16:31:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:54,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-04 16:31:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:54,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-04 16:31:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:54,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:31:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:54,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 16:31:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:54,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-04 16:31:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:54,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-04 16:31:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:54,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-04 16:31:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-04 16:31:54,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410534588] [2020-09-04 16:31:54,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:31:54,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-04 16:31:54,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110546010] [2020-09-04 16:31:54,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 16:31:54,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:31:54,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 16:31:54,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-09-04 16:31:54,383 INFO L87 Difference]: Start difference. First operand 177 states and 201 transitions. Second operand 14 states. [2020-09-04 16:31:55,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:31:55,870 INFO L93 Difference]: Finished difference Result 315 states and 360 transitions. [2020-09-04 16:31:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 16:31:55,871 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 101 [2020-09-04 16:31:55,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:31:55,873 INFO L225 Difference]: With dead ends: 315 [2020-09-04 16:31:55,874 INFO L226 Difference]: Without dead ends: 189 [2020-09-04 16:31:55,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-09-04 16:31:55,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-04 16:31:55,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 179. [2020-09-04 16:31:55,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-09-04 16:31:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 204 transitions. [2020-09-04 16:31:55,903 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 204 transitions. Word has length 101 [2020-09-04 16:31:55,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:31:55,904 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 204 transitions. [2020-09-04 16:31:55,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 16:31:55,904 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 204 transitions. [2020-09-04 16:31:55,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-04 16:31:55,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:31:55,906 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] [2020-09-04 16:31:55,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:31:55,906 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:31:55,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:31:55,907 INFO L82 PathProgramCache]: Analyzing trace with hash -646256580, now seen corresponding path program 1 times [2020-09-04 16:31:55,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:31:55,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839210411] [2020-09-04 16:31:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:31:55,910 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:31:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:56,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:31:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:56,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:31:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:56,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:31:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:56,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 16:31:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:56,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-04 16:31:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:56,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:31:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:56,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-04 16:31:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:56,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-04 16:31:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:56,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 16:31:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:56,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 16:31:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:56,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-04 16:31:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:56,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-04 16:31:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:56,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-09-04 16:31:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:31:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-09-04 16:31:56,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839210411] [2020-09-04 16:31:56,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:31:56,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-04 16:31:56,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593251394] [2020-09-04 16:31:56,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 16:31:56,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:31:56,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 16:31:56,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-09-04 16:31:56,301 INFO L87 Difference]: Start difference. First operand 179 states and 204 transitions. Second operand 17 states. [2020-09-04 16:31:57,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:31:57,994 INFO L93 Difference]: Finished difference Result 298 states and 339 transitions. [2020-09-04 16:31:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 16:31:57,995 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 124 [2020-09-04 16:31:57,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:31:57,999 INFO L225 Difference]: With dead ends: 298 [2020-09-04 16:31:57,999 INFO L226 Difference]: Without dead ends: 189 [2020-09-04 16:31:58,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 16:31:58,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-04 16:31:58,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 181. [2020-09-04 16:31:58,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-09-04 16:31:58,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 207 transitions. [2020-09-04 16:31:58,053 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 207 transitions. Word has length 124 [2020-09-04 16:31:58,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:31:58,057 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 207 transitions. [2020-09-04 16:31:58,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 16:31:58,058 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 207 transitions. [2020-09-04 16:31:58,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-04 16:31:58,062 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:31:58,063 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] [2020-09-04 16:31:58,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:31:58,063 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:31:58,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:31:58,064 INFO L82 PathProgramCache]: Analyzing trace with hash -435645933, now seen corresponding path program 1 times [2020-09-04 16:31:58,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:31:58,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765198078] [2020-09-04 16:31:58,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:31:58,068 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:31:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:31:58,145 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:31:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:31:58,223 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:31:58,303 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:31:58,304 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:31:58,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 16:31:58,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:31:58 BoogieIcfgContainer [2020-09-04 16:31:58,351 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:31:58,357 INFO L168 Benchmark]: Toolchain (without parser) took 9866.04 ms. Allocated memory was 139.5 MB in the beginning and 308.3 MB in the end (delta: 168.8 MB). Free memory was 102.3 MB in the beginning and 214.4 MB in the end (delta: -112.1 MB). Peak memory consumption was 56.7 MB. Max. memory is 7.1 GB. [2020-09-04 16:31:58,359 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 16:31:58,365 INFO L168 Benchmark]: CACSL2BoogieTranslator took 498.37 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 102.1 MB in the beginning and 179.5 MB in the end (delta: -77.5 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-09-04 16:31:58,367 INFO L168 Benchmark]: Boogie Preprocessor took 67.29 ms. Allocated memory is still 203.4 MB. Free memory was 179.5 MB in the beginning and 177.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-09-04 16:31:58,368 INFO L168 Benchmark]: RCFGBuilder took 758.57 ms. Allocated memory is still 203.4 MB. Free memory was 177.6 MB in the beginning and 137.0 MB in the end (delta: 40.6 MB). Peak memory consumption was 40.6 MB. Max. memory is 7.1 GB. [2020-09-04 16:31:58,369 INFO L168 Benchmark]: TraceAbstraction took 8535.44 ms. Allocated memory was 203.4 MB in the beginning and 308.3 MB in the end (delta: 104.9 MB). Free memory was 136.3 MB in the beginning and 214.4 MB in the end (delta: -78.1 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:31:58,381 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 498.37 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 102.1 MB in the beginning and 179.5 MB in the end (delta: -77.5 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 67.29 ms. Allocated memory is still 203.4 MB. Free memory was 179.5 MB in the beginning and 177.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 758.57 ms. Allocated memory is still 203.4 MB. Free memory was 177.6 MB in the beginning and 137.0 MB in the end (delta: 40.6 MB). Peak memory consumption was 40.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8535.44 ms. Allocated memory was 203.4 MB in the beginning and 308.3 MB in the end (delta: 104.9 MB). Free memory was 136.3 MB in the beginning and 214.4 MB in the end (delta: -78.1 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L96] CALL, EXPR nondet_tree() [L23] COND FALSE !(__VERIFIER_nondet_bool()) [L26] struct node *n = (struct node *)malloc(sizeof(struct node)); [L27] n->data = __VERIFIER_nondet_int() [L28] CALL, EXPR nondet_tree() [L23] COND TRUE __VERIFIER_nondet_bool() [L24] return 0; [L28] RET, EXPR nondet_tree() [L28] n->left = nondet_tree() [L29] CALL, EXPR nondet_tree() [L23] COND TRUE __VERIFIER_nondet_bool() [L24] return 0; [L29] RET, EXPR nondet_tree() [L29] n->right = nondet_tree() [L30] return n; [L96] RET, EXPR nondet_tree() [L96] CALL task(nondet_tree()) [L74] CALL, EXPR min(t) [L35] COND FALSE !(!n) [L38] EXPR n->left [L38] CALL, EXPR min(n->left) [L35] COND TRUE !n [L36] return 2147483647; [L38] RET, EXPR min(n->left) [L38] int a = min(n->left); [L39] EXPR n->right [L39] CALL, EXPR min(n->right) [L35] COND TRUE !n [L36] return 2147483647; [L39] RET, EXPR min(n->right) [L39] int b = min(n->right); [L40] COND TRUE a <= b [L40] return a; [L74] RET, EXPR min(t) [L74] int a = min(t); [L75] int b; [L77] CALL, EXPR size(t) [L69] COND FALSE !(!t) [L70] EXPR t->left [L70] CALL, EXPR size(t->left) [L69] COND TRUE !t [L69] return 0; [L70] RET, EXPR size(t->left) [L70] EXPR t->right [L70] CALL, EXPR size(t->right) [L69] COND TRUE !t [L69] return 0; [L70] RET, EXPR size(t->right) [L70] return size(t->left) + size(t->right) + 1; [L77] RET, EXPR size(t) [L77] int n = size(t); [L78] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) [L78] RET assume_abort_if_not(n != 0) [L79] EXPR, FCALL calloc(n, sizeof(int)) [L79] int *x = calloc(n, sizeof(int)); [L80] CALL tree_inorder(t, x, n) [L58] COND FALSE !(!t) [L61] EXPR t->left [L61] CALL, EXPR tree_inorder(t->left, a, i) [L58] COND TRUE !t [L59] return i; [L61] RET, EXPR tree_inorder(t->left, a, i) [L61] i = tree_inorder(t->left, a, i) [L62] EXPR i++ [L62] EXPR t->data [L62] a[i++] = t->data [L63] EXPR t->right [L63] CALL, EXPR tree_inorder(t->right, a, i) [L58] COND TRUE !t [L59] return i; [L63] RET, EXPR tree_inorder(t->right, a, i) [L63] i = tree_inorder(t->right, a, i) [L64] return i; [L80] RET tree_inorder(t, x, n) [L81] EXPR x[0] [L81] CALL __VERIFIER_assert(a == x[0]) [L14] COND TRUE !cond [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 183 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.4s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 662 SDtfs, 1440 SDslu, 2455 SDs, 0 SdLazy, 4099 SolverSat, 588 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 4 MinimizatonAttempts, 41 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...