/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_iter_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:50:34,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:50:34,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:50:34,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:50:34,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:50:34,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:50:34,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:50:34,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:50:34,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:50:34,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:50:34,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:50:34,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:50:34,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:50:34,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:50:34,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:50:34,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:50:34,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:50:34,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:50:34,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:50:34,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:50:34,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:50:34,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:50:34,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:50:34,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:50:34,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:50:34,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:50:34,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:50:34,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:50:34,861 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:50:34,878 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:50:34,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:50:34,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:50:34,882 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:50:34,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:50:34,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:50:34,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:50:34,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:50:34,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:50:34,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:50:34,884 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:50:34,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:50:34,885 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:50:34,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:50:34,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:50:34,886 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:50:34,886 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:50:34,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:50:34,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:50:34,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:50:34,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:50:34,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:50:34,887 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:50:35,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:50:35,241 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:50:35,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:50:35,246 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:50:35,247 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:50:35,248 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-08-22 19:50:35,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90b3dc28c/9a91d2fa9d4245fcaee00079a7b4d3a0/FLAG3bebc3cf9 [2020-08-22 19:50:35,825 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:50:35,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-08-22 19:50:35,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90b3dc28c/9a91d2fa9d4245fcaee00079a7b4d3a0/FLAG3bebc3cf9 [2020-08-22 19:50:36,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90b3dc28c/9a91d2fa9d4245fcaee00079a7b4d3a0 [2020-08-22 19:50:36,193 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:50:36,195 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:50:36,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:50:36,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:50:36,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:50:36,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:50:36" (1/1) ... [2020-08-22 19:50:36,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28df82c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:36, skipping insertion in model container [2020-08-22 19:50:36,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:50:36" (1/1) ... [2020-08-22 19:50:36,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:50:36,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:50:36,437 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-22 19:50:36,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:50:36,473 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:50:36,496 WARN L1484 CHandler]: Possible shadowing of function min [2020-08-22 19:50:36,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:50:36,634 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:50:36,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:36 WrapperNode [2020-08-22 19:50:36,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:50:36,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:50:36,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:50:36,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:50:36,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:36" (1/1) ... [2020-08-22 19:50:36,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:36" (1/1) ... [2020-08-22 19:50:36,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:36" (1/1) ... [2020-08-22 19:50:36,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:36" (1/1) ... [2020-08-22 19:50:36,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:36" (1/1) ... [2020-08-22 19:50:36,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:36" (1/1) ... [2020-08-22 19:50:36,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:36" (1/1) ... [2020-08-22 19:50:36,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:50:36,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:50:36,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:50:36,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:50:36,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:36" (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 [2020-08-22 19:50:36,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:50:36,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:50:36,774 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:50:36,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:50:36,774 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-08-22 19:50:36,774 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-08-22 19:50:36,774 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-08-22 19:50:36,774 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-08-22 19:50:36,774 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-08-22 19:50:36,775 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-08-22 19:50:36,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:50:36,775 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-22 19:50:36,775 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 19:50:36,775 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 19:50:36,775 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 19:50:36,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:50:36,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 19:50:36,776 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:50:36,776 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:50:36,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:50:36,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:50:36,777 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-08-22 19:50:36,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 19:50:36,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:50:36,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 19:50:36,777 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-08-22 19:50:36,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 19:50:36,778 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-08-22 19:50:36,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:50:36,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:50:36,778 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-08-22 19:50:36,778 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-08-22 19:50:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-08-22 19:50:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:50:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-22 19:50:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:50:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:50:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:50:37,503 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:50:37,503 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 19:50:37,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:50:37 BoogieIcfgContainer [2020-08-22 19:50:37,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:50:37,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:50:37,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:50:37,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:50:37,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:50:36" (1/3) ... [2020-08-22 19:50:37,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db530d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:50:37, skipping insertion in model container [2020-08-22 19:50:37,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:36" (2/3) ... [2020-08-22 19:50:37,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db530d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:50:37, skipping insertion in model container [2020-08-22 19:50:37,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:50:37" (3/3) ... [2020-08-22 19:50:37,521 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2020-08-22 19:50:37,533 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:50:37,542 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:50:37,557 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:50:37,578 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:50:37,578 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:50:37,578 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:50:37,578 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:50:37,579 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:50:37,579 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:50:37,579 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:50:37,579 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:50:37,599 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states. [2020-08-22 19:50:37,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 19:50:37,617 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:37,618 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] [2020-08-22 19:50:37,619 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:37,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:37,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1732590877, now seen corresponding path program 1 times [2020-08-22 19:50:37,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:37,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568161099] [2020-08-22 19:50:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:37,696 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:37,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:37,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:50:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:37,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 19:50:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:37,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 19:50:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:38,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 19:50:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:38,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 19:50:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:38,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 19:50:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:38,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568161099] [2020-08-22 19:50:38,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:38,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:50:38,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190440237] [2020-08-22 19:50:38,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:50:38,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:38,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:50:38,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:50:38,201 INFO L87 Difference]: Start difference. First operand 199 states. Second operand 11 states. [2020-08-22 19:50:39,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:39,540 INFO L93 Difference]: Finished difference Result 357 states and 415 transitions. [2020-08-22 19:50:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 19:50:39,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-08-22 19:50:39,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:39,560 INFO L225 Difference]: With dead ends: 357 [2020-08-22 19:50:39,560 INFO L226 Difference]: Without dead ends: 205 [2020-08-22 19:50:39,567 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 [2020-08-22 19:50:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-22 19:50:39,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 191. [2020-08-22 19:50:39,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-22 19:50:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 214 transitions. [2020-08-22 19:50:39,650 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 214 transitions. Word has length 60 [2020-08-22 19:50:39,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:39,651 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 214 transitions. [2020-08-22 19:50:39,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:50:39,652 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 214 transitions. [2020-08-22 19:50:39,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 19:50:39,657 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:39,657 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] [2020-08-22 19:50:39,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:50:39,658 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:39,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:39,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1923885975, now seen corresponding path program 1 times [2020-08-22 19:50:39,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:39,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466682256] [2020-08-22 19:50:39,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:39,663 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:50:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 19:50:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 19:50:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 19:50:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 19:50:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 19:50:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:39,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 19:50:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:40,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 19:50:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 19:50:40,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466682256] [2020-08-22 19:50:40,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:40,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 19:50:40,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548187707] [2020-08-22 19:50:40,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 19:50:40,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:40,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 19:50:40,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:50:40,022 INFO L87 Difference]: Start difference. First operand 191 states and 214 transitions. Second operand 12 states. [2020-08-22 19:50:41,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:41,370 INFO L93 Difference]: Finished difference Result 349 states and 394 transitions. [2020-08-22 19:50:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:50:41,372 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-08-22 19:50:41,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:41,378 INFO L225 Difference]: With dead ends: 349 [2020-08-22 19:50:41,378 INFO L226 Difference]: Without dead ends: 204 [2020-08-22 19:50:41,383 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 [2020-08-22 19:50:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-08-22 19:50:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 193. [2020-08-22 19:50:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-08-22 19:50:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 217 transitions. [2020-08-22 19:50:41,419 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 217 transitions. Word has length 80 [2020-08-22 19:50:41,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:41,419 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 217 transitions. [2020-08-22 19:50:41,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 19:50:41,420 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 217 transitions. [2020-08-22 19:50:41,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-22 19:50:41,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:41,425 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] [2020-08-22 19:50:41,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:50:41,425 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:41,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:41,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1271695359, now seen corresponding path program 1 times [2020-08-22 19:50:41,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:41,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703377319] [2020-08-22 19:50:41,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:41,429 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:50:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:50:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 19:50:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 19:50:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 19:50:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 19:50:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 19:50:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 19:50:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 19:50:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 19:50:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 19:50:41,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703377319] [2020-08-22 19:50:41,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:41,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:50:41,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757155795] [2020-08-22 19:50:41,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:50:41,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:41,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:50:41,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:50:41,754 INFO L87 Difference]: Start difference. First operand 193 states and 217 transitions. Second operand 14 states. [2020-08-22 19:50:43,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:43,110 INFO L93 Difference]: Finished difference Result 348 states and 393 transitions. [2020-08-22 19:50:43,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 19:50:43,110 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 101 [2020-08-22 19:50:43,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:43,114 INFO L225 Difference]: With dead ends: 348 [2020-08-22 19:50:43,114 INFO L226 Difference]: Without dead ends: 206 [2020-08-22 19:50:43,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-08-22 19:50:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-22 19:50:43,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 195. [2020-08-22 19:50:43,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-08-22 19:50:43,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 220 transitions. [2020-08-22 19:50:43,166 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 220 transitions. Word has length 101 [2020-08-22 19:50:43,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:43,168 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 220 transitions. [2020-08-22 19:50:43,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:50:43,168 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 220 transitions. [2020-08-22 19:50:43,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 19:50:43,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:43,176 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] [2020-08-22 19:50:43,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:50:43,177 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:43,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:43,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1449297352, now seen corresponding path program 1 times [2020-08-22 19:50:43,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:43,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738345847] [2020-08-22 19:50:43,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:43,183 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:43,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:43,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:50:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:43,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:50:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:43,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 19:50:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:43,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 19:50:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:43,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 19:50:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:43,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-22 19:50:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:43,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 19:50:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:43,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 19:50:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:43,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 19:50:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:43,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 19:50:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:43,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 19:50:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:43,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-22 19:50:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-08-22 19:50:43,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738345847] [2020-08-22 19:50:43,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:43,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:50:43,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900749709] [2020-08-22 19:50:43,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:50:43,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:43,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:50:43,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:50:43,539 INFO L87 Difference]: Start difference. First operand 195 states and 220 transitions. Second operand 11 states. [2020-08-22 19:50:44,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:44,601 INFO L93 Difference]: Finished difference Result 377 states and 431 transitions. [2020-08-22 19:50:44,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:50:44,601 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 124 [2020-08-22 19:50:44,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:44,605 INFO L225 Difference]: With dead ends: 377 [2020-08-22 19:50:44,605 INFO L226 Difference]: Without dead ends: 213 [2020-08-22 19:50:44,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2020-08-22 19:50:44,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-08-22 19:50:44,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 200. [2020-08-22 19:50:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-22 19:50:44,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 225 transitions. [2020-08-22 19:50:44,655 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 225 transitions. Word has length 124 [2020-08-22 19:50:44,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:44,656 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 225 transitions. [2020-08-22 19:50:44,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:50:44,656 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 225 transitions. [2020-08-22 19:50:44,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 19:50:44,658 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:44,659 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] [2020-08-22 19:50:44,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:50:44,659 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:44,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:44,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1187421704, now seen corresponding path program 1 times [2020-08-22 19:50:44,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:44,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481639049] [2020-08-22 19:50:44,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:44,663 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:44,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:44,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:50:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:44,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 19:50:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:44,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-22 19:50:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:44,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 19:50:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:44,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 19:50:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:44,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-22 19:50:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:44,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 19:50:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:44,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 19:50:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:44,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 19:50:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:44,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 19:50:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:44,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 19:50:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:44,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-22 19:50:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-22 19:50:44,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481639049] [2020-08-22 19:50:44,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:44,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:50:44,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752671173] [2020-08-22 19:50:44,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:50:44,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:44,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:50:44,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:50:44,997 INFO L87 Difference]: Start difference. First operand 200 states and 225 transitions. Second operand 14 states. [2020-08-22 19:50:46,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:46,295 INFO L93 Difference]: Finished difference Result 336 states and 377 transitions. [2020-08-22 19:50:46,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 19:50:46,297 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 124 [2020-08-22 19:50:46,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:46,300 INFO L225 Difference]: With dead ends: 336 [2020-08-22 19:50:46,300 INFO L226 Difference]: Without dead ends: 211 [2020-08-22 19:50:46,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-08-22 19:50:46,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-08-22 19:50:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2020-08-22 19:50:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-08-22 19:50:46,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 229 transitions. [2020-08-22 19:50:46,333 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 229 transitions. Word has length 124 [2020-08-22 19:50:46,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:46,334 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 229 transitions. [2020-08-22 19:50:46,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:50:46,334 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 229 transitions. [2020-08-22 19:50:46,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-08-22 19:50:46,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:46,336 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:46,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:50:46,337 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:46,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:46,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1025407455, now seen corresponding path program 1 times [2020-08-22 19:50:46,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:46,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666719700] [2020-08-22 19:50:46,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:46,340 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:50:46,376 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:50:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:50:46,410 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:50:46,462 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 19:50:46,463 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 19:50:46,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:50:46,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:50:46 BoogieIcfgContainer [2020-08-22 19:50:46,491 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:50:46,495 INFO L168 Benchmark]: Toolchain (without parser) took 10299.11 ms. Allocated memory was 140.0 MB in the beginning and 330.3 MB in the end (delta: 190.3 MB). Free memory was 104.1 MB in the beginning and 175.1 MB in the end (delta: -70.9 MB). Peak memory consumption was 119.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:46,496 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 140.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:50:46,497 INFO L168 Benchmark]: CACSL2BoogieTranslator took 439.67 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 103.9 MB in the beginning and 182.9 MB in the end (delta: -79.0 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:46,497 INFO L168 Benchmark]: Boogie Preprocessor took 58.75 ms. Allocated memory is still 205.0 MB. Free memory was 182.9 MB in the beginning and 179.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:46,498 INFO L168 Benchmark]: RCFGBuilder took 816.53 ms. Allocated memory is still 205.0 MB. Free memory was 179.9 MB in the beginning and 136.5 MB in the end (delta: 43.4 MB). Peak memory consumption was 43.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:46,499 INFO L168 Benchmark]: TraceAbstraction took 8978.49 ms. Allocated memory was 205.0 MB in the beginning and 330.3 MB in the end (delta: 125.3 MB). Free memory was 135.8 MB in the beginning and 175.1 MB in the end (delta: -39.2 MB). Peak memory consumption was 86.1 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:46,503 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 140.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 439.67 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 103.9 MB in the beginning and 182.9 MB in the end (delta: -79.0 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 58.75 ms. Allocated memory is still 205.0 MB. Free memory was 182.9 MB in the beginning and 179.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 816.53 ms. Allocated memory is still 205.0 MB. Free memory was 179.9 MB in the beginning and 136.5 MB in the end (delta: 43.4 MB). Peak memory consumption was 43.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8978.49 ms. Allocated memory was 205.0 MB in the beginning and 330.3 MB in the end (delta: 125.3 MB). Free memory was 135.8 MB in the beginning and 175.1 MB in the end (delta: -39.2 MB). Peak memory consumption was 86.1 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: [L103] 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; [L103] RET, EXPR nondet_tree() [L103] CALL task(nondet_tree()) [L81] 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; [L81] RET, EXPR min(t) [L81] int a = min(t); [L82] int b; [L84] CALL, EXPR size(t) [L76] COND FALSE !(!t) [L77] EXPR t->left [L77] CALL, EXPR size(t->left) [L76] COND TRUE !t [L76] return 0; [L77] RET, EXPR size(t->left) [L77] EXPR t->right [L77] CALL, EXPR size(t->right) [L76] COND TRUE !t [L76] return 0; [L77] RET, EXPR size(t->right) [L77] return size(t->left) + size(t->right) + 1; [L84] RET, EXPR size(t) [L84] int n = size(t); [L85] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) [L85] RET assume_abort_if_not(n != 0) [L86] EXPR, FCALL calloc(n, sizeof(int)) [L86] int *x = calloc(n, sizeof(int)); [L87] CALL tree_inorder(t, x, n) [L65] COND FALSE !(!t) [L68] EXPR t->left [L68] CALL, EXPR tree_inorder(t->left, a, i) [L65] COND TRUE !t [L66] return i; [L68] RET, EXPR tree_inorder(t->left, a, i) [L68] i = tree_inorder(t->left, a, i) [L69] EXPR i++ [L69] EXPR t->data [L69] a[i++] = t->data [L70] EXPR t->right [L70] CALL, EXPR tree_inorder(t->right, a, i) [L65] COND TRUE !t [L66] return i; [L70] RET, EXPR tree_inorder(t->right, a, i) [L70] i = tree_inorder(t->right, a, i) [L71] return i; [L87] RET tree_inorder(t, x, n) [L88] EXPR x[0] [L88] CALL __VERIFIER_assert(a == x[0]) [L14] COND TRUE !cond [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 199 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 876 SDtfs, 1857 SDslu, 2588 SDs, 0 SdLazy, 5154 SolverSat, 648 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 201 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=202occurred in iteration=5, 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, 5 MinimizatonAttempts, 58 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...