/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.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:57:53,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:57:53,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:57:53,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:57:53,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:57:53,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:57:53,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:57:53,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:57:53,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:57:53,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:57:53,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:57:53,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:57:53,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:57:53,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:57:53,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:57:53,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:57:53,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:57:53,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:57:53,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:57:53,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:57:53,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:57:53,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:57:53,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:57:53,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:57:53,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 17:57:53,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:57:53,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:57:53,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:57:53,834 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 17:57:53,854 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:57:53,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:57:53,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:57:53,857 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:57:53,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:57:53,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:57:53,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:57:53,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:57:53,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:57:53,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:57:53,859 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:57:53,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:57:53,860 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:57:53,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:57:53,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:57:53,861 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:57:53,861 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:57:53,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:57:53,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:57:53,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:57:53,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:57:53,862 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:57:53,862 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:57:54,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:57:54,457 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:57:54,463 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:57:54,465 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:57:54,466 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:57:54,468 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter.c [2020-09-04 17:57:54,580 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d4229a88/12039535512e4c16a3d7b16baa248ced/FLAG5c40fb001 [2020-09-04 17:57:55,169 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:57:55,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_iter.c [2020-09-04 17:57:55,182 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d4229a88/12039535512e4c16a3d7b16baa248ced/FLAG5c40fb001 [2020-09-04 17:57:55,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1d4229a88/12039535512e4c16a3d7b16baa248ced [2020-09-04 17:57:55,483 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:57:55,486 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:57:55,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:57:55,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:57:55,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:57:55,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:57:55" (1/1) ... [2020-09-04 17:57:55,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b3ac5cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:57:55, skipping insertion in model container [2020-09-04 17:57:55,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:57:55" (1/1) ... [2020-09-04 17:57:55,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:57:55,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:57:55,772 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-04 17:57:55,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:57:55,812 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:57:55,969 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-04 17:57:55,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:57:56,010 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:57:56,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:57:56 WrapperNode [2020-09-04 17:57:56,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:57:56,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:57:56,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:57:56,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:57:56,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:57:56" (1/1) ... [2020-09-04 17:57:56,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:57:56" (1/1) ... [2020-09-04 17:57:56,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:57:56" (1/1) ... [2020-09-04 17:57:56,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:57:56" (1/1) ... [2020-09-04 17:57:56,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:57:56" (1/1) ... [2020-09-04 17:57:56,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:57:56" (1/1) ... [2020-09-04 17:57:56,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:57:56" (1/1) ... [2020-09-04 17:57:56,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:57:56,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:57:56,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:57:56,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:57:56,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:57:56" (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 17:57:56,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:57:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:57:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2020-09-04 17:57:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:57:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-09-04 17:57:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-09-04 17:57:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-09-04 17:57:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-09-04 17:57:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-09-04 17:57:56,172 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-09-04 17:57:56,172 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:57:56,172 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-09-04 17:57:56,172 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-04 17:57:56,172 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 17:57:56,173 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 17:57:56,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 17:57:56,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-04 17:57:56,174 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2020-09-04 17:57:56,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:57:56,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:57:56,174 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-09-04 17:57:56,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 17:57:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 17:57:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 17:57:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-09-04 17:57:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 17:57:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 17:57:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-09-04 17:57:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 17:57:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-09-04 17:57:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-09-04 17:57:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-09-04 17:57:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 17:57:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-09-04 17:57:56,177 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:57:56,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:57:56,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:57:56,901 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:57:56,901 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 17:57:56,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:57:56 BoogieIcfgContainer [2020-09-04 17:57:56,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:57:56,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:57:56,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:57:56,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:57:56,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:57:55" (1/3) ... [2020-09-04 17:57:56,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed2d317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:57:56, skipping insertion in model container [2020-09-04 17:57:56,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:57:56" (2/3) ... [2020-09-04 17:57:56,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed2d317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:57:56, skipping insertion in model container [2020-09-04 17:57:56,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:57:56" (3/3) ... [2020-09-04 17:57:56,930 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2020-09-04 17:57:56,944 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:57:56,961 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:57:56,988 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:57:57,024 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:57:57,025 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:57:57,025 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:57:57,025 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:57:57,026 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:57:57,026 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:57:57,026 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:57:57,026 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:57:57,059 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states. [2020-09-04 17:57:57,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-04 17:57:57,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:57:57,086 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 17:57:57,087 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:57:57,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:57:57,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1657225032, now seen corresponding path program 1 times [2020-09-04 17:57:57,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:57:57,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939315689] [2020-09-04 17:57:57,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:57:57,184 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:57:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:57,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:57:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:57,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 17:57:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:57,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 17:57:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:57,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 17:57:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:57,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-04 17:57:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:57,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-04 17:57:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:57,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-04 17:57:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:57,778 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 17:57:57,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939315689] [2020-09-04 17:57:57,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:57:57,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-04 17:57:57,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910364166] [2020-09-04 17:57:57,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 17:57:57,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:57:57,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 17:57:57,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-04 17:57:57,818 INFO L87 Difference]: Start difference. First operand 206 states. Second operand 11 states. [2020-09-04 17:57:59,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:57:59,451 INFO L93 Difference]: Finished difference Result 366 states and 427 transitions. [2020-09-04 17:57:59,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 17:57:59,454 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-04 17:57:59,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:57:59,475 INFO L225 Difference]: With dead ends: 366 [2020-09-04 17:57:59,476 INFO L226 Difference]: Without dead ends: 210 [2020-09-04 17:57:59,483 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 17:57:59,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-04 17:57:59,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 196. [2020-09-04 17:57:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-09-04 17:57:59,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 220 transitions. [2020-09-04 17:57:59,589 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 220 transitions. Word has length 60 [2020-09-04 17:57:59,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:57:59,590 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 220 transitions. [2020-09-04 17:57:59,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 17:57:59,591 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 220 transitions. [2020-09-04 17:57:59,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-04 17:57:59,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:57:59,608 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 17:57:59,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:57:59,610 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:57:59,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:57:59,611 INFO L82 PathProgramCache]: Analyzing trace with hash -290171790, now seen corresponding path program 1 times [2020-09-04 17:57:59,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:57:59,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779379561] [2020-09-04 17:57:59,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:57:59,619 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:57:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:59,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:57:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:59,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 17:57:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:59,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 17:57:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:59,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 17:57:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:59,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 17:57:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:59,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:57:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:59,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-04 17:57:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:59,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-04 17:57:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:59,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-04 17:57:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:59,949 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 17:57:59,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779379561] [2020-09-04 17:57:59,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:57:59,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-04 17:57:59,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814279195] [2020-09-04 17:57:59,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 17:57:59,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:57:59,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 17:57:59,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-09-04 17:57:59,954 INFO L87 Difference]: Start difference. First operand 196 states and 220 transitions. Second operand 12 states. [2020-09-04 17:58:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:58:01,460 INFO L93 Difference]: Finished difference Result 354 states and 400 transitions. [2020-09-04 17:58:01,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 17:58:01,463 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-09-04 17:58:01,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:58:01,467 INFO L225 Difference]: With dead ends: 354 [2020-09-04 17:58:01,468 INFO L226 Difference]: Without dead ends: 209 [2020-09-04 17:58:01,472 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 17:58:01,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-04 17:58:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 198. [2020-09-04 17:58:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-09-04 17:58:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 223 transitions. [2020-09-04 17:58:01,509 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 223 transitions. Word has length 80 [2020-09-04 17:58:01,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:58:01,509 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 223 transitions. [2020-09-04 17:58:01,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 17:58:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 223 transitions. [2020-09-04 17:58:01,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-04 17:58:01,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:58:01,512 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 17:58:01,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:58:01,513 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:58:01,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:58:01,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1366806748, now seen corresponding path program 1 times [2020-09-04 17:58:01,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:58:01,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656713147] [2020-09-04 17:58:01,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:58:01,518 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:58:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:01,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:58:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:01,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 17:58:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:01,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 17:58:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:01,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 17:58:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:01,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-04 17:58:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:01,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-04 17:58:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:01,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 17:58:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:01,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:58:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:01,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-04 17:58:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:01,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-04 17:58:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:01,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-04 17:58:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:01,911 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 17:58:01,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656713147] [2020-09-04 17:58:01,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:58:01,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-04 17:58:01,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423307089] [2020-09-04 17:58:01,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 17:58:01,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:58:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 17:58:01,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-09-04 17:58:01,915 INFO L87 Difference]: Start difference. First operand 198 states and 223 transitions. Second operand 14 states. [2020-09-04 17:58:03,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:58:03,576 INFO L93 Difference]: Finished difference Result 353 states and 399 transitions. [2020-09-04 17:58:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 17:58:03,577 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 101 [2020-09-04 17:58:03,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:58:03,584 INFO L225 Difference]: With dead ends: 353 [2020-09-04 17:58:03,585 INFO L226 Difference]: Without dead ends: 211 [2020-09-04 17:58:03,589 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 17:58:03,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-04 17:58:03,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 200. [2020-09-04 17:58:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-04 17:58:03,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 226 transitions. [2020-09-04 17:58:03,667 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 226 transitions. Word has length 101 [2020-09-04 17:58:03,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:58:03,668 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 226 transitions. [2020-09-04 17:58:03,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 17:58:03,669 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 226 transitions. [2020-09-04 17:58:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-04 17:58:03,673 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:58:03,673 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:58:03,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:58:03,674 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:58:03,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:58:03,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1397703292, now seen corresponding path program 1 times [2020-09-04 17:58:03,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:58:03,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631409110] [2020-09-04 17:58:03,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:58:03,679 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:58:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:03,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:58:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:03,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 17:58:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:03,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 17:58:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:03,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 17:58:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:04,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-04 17:58:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:04,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 17:58:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:04,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-04 17:58:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:04,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-04 17:58:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:04,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 17:58:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:04,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 17:58:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:04,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-04 17:58:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:04,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-04 17:58:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:04,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-09-04 17:58:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-04 17:58:04,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631409110] [2020-09-04 17:58:04,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:58:04,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-04 17:58:04,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592506471] [2020-09-04 17:58:04,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 17:58:04,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:58:04,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 17:58:04,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-09-04 17:58:04,205 INFO L87 Difference]: Start difference. First operand 200 states and 226 transitions. Second operand 14 states. [2020-09-04 17:58:05,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:58:05,794 INFO L93 Difference]: Finished difference Result 336 states and 378 transitions. [2020-09-04 17:58:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 17:58:05,795 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 127 [2020-09-04 17:58:05,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:58:05,800 INFO L225 Difference]: With dead ends: 336 [2020-09-04 17:58:05,800 INFO L226 Difference]: Without dead ends: 211 [2020-09-04 17:58:05,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-09-04 17:58:05,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-04 17:58:05,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2020-09-04 17:58:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-09-04 17:58:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 230 transitions. [2020-09-04 17:58:05,849 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 230 transitions. Word has length 127 [2020-09-04 17:58:05,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:58:05,853 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 230 transitions. [2020-09-04 17:58:05,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 17:58:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 230 transitions. [2020-09-04 17:58:05,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-04 17:58:05,856 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:58:05,857 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:58:05,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:58:05,857 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:58:05,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:58:05,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1130815571, now seen corresponding path program 1 times [2020-09-04 17:58:05,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:58:05,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462343238] [2020-09-04 17:58:05,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:58:05,863 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:58:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 17:58:05,936 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 17:58:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 17:58:05,999 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 17:58:06,063 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 17:58:06,063 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 17:58:06,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 17:58:06,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 05:58:06 BoogieIcfgContainer [2020-09-04 17:58:06,096 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 17:58:06,100 INFO L168 Benchmark]: Toolchain (without parser) took 10613.73 ms. Allocated memory was 144.7 MB in the beginning and 317.7 MB in the end (delta: 173.0 MB). Free memory was 101.3 MB in the beginning and 242.1 MB in the end (delta: -140.7 MB). Peak memory consumption was 32.3 MB. Max. memory is 7.1 GB. [2020-09-04 17:58:06,101 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 144.7 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 17:58:06,102 INFO L168 Benchmark]: CACSL2BoogieTranslator took 520.16 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 101.1 MB in the beginning and 178.9 MB in the end (delta: -77.8 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-09-04 17:58:06,103 INFO L168 Benchmark]: Boogie Preprocessor took 70.89 ms. Allocated memory is still 202.4 MB. Free memory was 178.9 MB in the beginning and 176.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-04 17:58:06,104 INFO L168 Benchmark]: RCFGBuilder took 832.05 ms. Allocated memory is still 202.4 MB. Free memory was 176.2 MB in the beginning and 130.8 MB in the end (delta: 45.4 MB). Peak memory consumption was 45.4 MB. Max. memory is 7.1 GB. [2020-09-04 17:58:06,105 INFO L168 Benchmark]: TraceAbstraction took 9178.65 ms. Allocated memory was 202.4 MB in the beginning and 317.7 MB in the end (delta: 115.3 MB). Free memory was 130.8 MB in the beginning and 242.1 MB in the end (delta: -111.3 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-09-04 17:58:06,109 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 144.7 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 520.16 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 101.1 MB in the beginning and 178.9 MB in the end (delta: -77.8 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 70.89 ms. Allocated memory is still 202.4 MB. Free memory was 178.9 MB in the beginning and 176.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 832.05 ms. Allocated memory is still 202.4 MB. Free memory was 176.2 MB in the beginning and 130.8 MB in the end (delta: 45.4 MB). Peak memory consumption was 45.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9178.65 ms. Allocated memory was 202.4 MB in the beginning and 317.7 MB in the end (delta: 115.3 MB). Free memory was 130.8 MB in the beginning and 242.1 MB in the end (delta: -111.3 MB). Peak memory consumption was 4.1 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: [L108] 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; [L108] RET, EXPR nondet_tree() [L108] CALL task(nondet_tree()) [L84] CALL, EXPR min(t) [L35] COND FALSE !(!n) [L38] EXPR n->data [L38] int a = n->data; [L39] EXPR n->left [L39] CALL, EXPR min(n->left) [L35] COND TRUE !n [L36] return 2147483647; [L39] RET, EXPR min(n->left) [L39] int b = min(n->left); [L40] EXPR n->right [L40] CALL, EXPR min(n->right) [L35] COND TRUE !n [L36] return 2147483647; [L40] RET, EXPR min(n->right) [L40] int c = min(n->right); [L41] COND TRUE b <= a && b <= c [L41] return b; [L84] RET, EXPR min(t) [L84] int a = min(t); [L85] int b; [L87] CALL, EXPR size(t) [L79] COND FALSE !(!t) [L80] EXPR t->left [L80] CALL, EXPR size(t->left) [L79] COND TRUE !t [L79] return 0; [L80] RET, EXPR size(t->left) [L80] EXPR t->right [L80] CALL, EXPR size(t->right) [L79] COND TRUE !t [L79] return 0; [L80] RET, EXPR size(t->right) [L80] return size(t->left) + size(t->right) + 1; [L87] RET, EXPR size(t) [L87] int n = size(t); [L88] CALL assume_cycle_if_not(n != 0) [L9] COND FALSE !(!cond) [L88] RET assume_cycle_if_not(n != 0) [L89] EXPR, FCALL calloc(n, sizeof(int)) [L89] int *x = calloc(n, sizeof(int)); [L90] CALL tree_inorder(t, x, n) [L68] COND FALSE !(!t) [L71] EXPR t->left [L71] CALL, EXPR tree_inorder(t->left, a, i) [L68] COND TRUE !t [L69] return i; [L71] RET, EXPR tree_inorder(t->left, a, i) [L71] i = tree_inorder(t->left, a, i) [L72] EXPR i++ [L72] EXPR t->data [L72] a[i++] = t->data [L73] EXPR t->right [L73] CALL, EXPR tree_inorder(t->right, a, i) [L68] COND TRUE !t [L69] return i; [L73] RET, EXPR tree_inorder(t->right, a, i) [L73] i = tree_inorder(t->right, a, i) [L74] return i; [L90] RET tree_inorder(t, x, n) [L91] EXPR x[0] [L91] CALL __VERIFIER_assert(a == x[0]) [L14] COND TRUE !cond [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 206 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.0s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 726 SDtfs, 1454 SDslu, 2163 SDs, 0 SdLazy, 4521 SolverSat, 495 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=206occurred 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, 45 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...