/usr/bin/java -ea -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/recursive/Ackermann04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-8fc6572 [2020-07-10 18:36:04,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-10 18:36:04,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-10 18:36:04,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-10 18:36:04,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-10 18:36:04,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-10 18:36:04,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-10 18:36:04,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-10 18:36:04,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-10 18:36:04,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-10 18:36:04,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-10 18:36:04,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-10 18:36:04,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-10 18:36:04,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-10 18:36:04,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-10 18:36:04,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-10 18:36:04,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-10 18:36:04,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-10 18:36:04,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-10 18:36:04,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-10 18:36:04,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-10 18:36:04,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-10 18:36:04,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-10 18:36:04,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-10 18:36:04,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-10 18:36:04,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-10 18:36:04,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-10 18:36:04,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-10 18:36:04,256 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-10 18:36:04,266 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-10 18:36:04,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-10 18:36:04,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-10 18:36:04,267 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-10 18:36:04,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-10 18:36:04,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-10 18:36:04,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-10 18:36:04,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-10 18:36:04,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-10 18:36:04,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-10 18:36:04,269 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-10 18:36:04,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-10 18:36:04,269 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-10 18:36:04,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-10 18:36:04,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-10 18:36:04,270 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-10 18:36:04,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-10 18:36:04,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-10 18:36:04,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-10 18:36:04,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-10 18:36:04,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-10 18:36:04,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-10 18:36:04,271 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-10 18:36:04,535 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-10 18:36:04,554 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-10 18:36:04,557 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-10 18:36:04,559 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-10 18:36:04,559 INFO L275 PluginConnector]: CDTParser initialized [2020-07-10 18:36:04,560 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann04.c [2020-07-10 18:36:04,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/435abe8be/80b70e0bcf2140dfa5ffd4b818e9cdc7/FLAG41d3c0449 [2020-07-10 18:36:05,115 INFO L306 CDTParser]: Found 1 translation units. [2020-07-10 18:36:05,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann04.c [2020-07-10 18:36:05,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/435abe8be/80b70e0bcf2140dfa5ffd4b818e9cdc7/FLAG41d3c0449 [2020-07-10 18:36:05,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/435abe8be/80b70e0bcf2140dfa5ffd4b818e9cdc7 [2020-07-10 18:36:05,488 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-10 18:36:05,490 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-10 18:36:05,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-10 18:36:05,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-10 18:36:05,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-10 18:36:05,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 06:36:05" (1/1) ... [2020-07-10 18:36:05,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b5786de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:05, skipping insertion in model container [2020-07-10 18:36:05,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 06:36:05" (1/1) ... [2020-07-10 18:36:05,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-10 18:36:05,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-10 18:36:05,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 18:36:05,690 INFO L203 MainTranslator]: Completed pre-run [2020-07-10 18:36:05,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 18:36:05,723 INFO L208 MainTranslator]: Completed translation [2020-07-10 18:36:05,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:05 WrapperNode [2020-07-10 18:36:05,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-10 18:36:05,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-10 18:36:05,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-10 18:36:05,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-10 18:36:05,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:05" (1/1) ... [2020-07-10 18:36:05,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:05" (1/1) ... [2020-07-10 18:36:05,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:05" (1/1) ... [2020-07-10 18:36:05,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:05" (1/1) ... [2020-07-10 18:36:05,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:05" (1/1) ... [2020-07-10 18:36:05,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:05" (1/1) ... [2020-07-10 18:36:05,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:05" (1/1) ... [2020-07-10 18:36:05,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-10 18:36:05,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-10 18:36:05,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-10 18:36:05,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-10 18:36:05,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:05" (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 [2020-07-10 18:36:05,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-10 18:36:05,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-10 18:36:05,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-10 18:36:05,903 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-10 18:36:05,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-10 18:36:05,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-10 18:36:05,903 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-10 18:36:05,903 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-10 18:36:05,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-10 18:36:05,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-10 18:36:06,287 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-10 18:36:06,288 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-10 18:36:06,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 06:36:06 BoogieIcfgContainer [2020-07-10 18:36:06,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-10 18:36:06,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-10 18:36:06,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-10 18:36:06,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-10 18:36:06,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.07 06:36:05" (1/3) ... [2020-07-10 18:36:06,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565c543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 06:36:06, skipping insertion in model container [2020-07-10 18:36:06,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:05" (2/3) ... [2020-07-10 18:36:06,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565c543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 06:36:06, skipping insertion in model container [2020-07-10 18:36:06,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 06:36:06" (3/3) ... [2020-07-10 18:36:06,301 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2020-07-10 18:36:06,308 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-10 18:36:06,314 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-10 18:36:06,327 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-10 18:36:06,348 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-10 18:36:06,348 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-10 18:36:06,348 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-10 18:36:06,348 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-10 18:36:06,348 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-10 18:36:06,349 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-10 18:36:06,349 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-10 18:36:06,349 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-10 18:36:06,364 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-07-10 18:36:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-10 18:36:06,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 18:36:06,376 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] [2020-07-10 18:36:06,377 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 18:36:06,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 18:36:06,383 INFO L82 PathProgramCache]: Analyzing trace with hash -852610024, now seen corresponding path program 1 times [2020-07-10 18:36:06,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 18:36:06,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152194087] [2020-07-10 18:36:06,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 18:36:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:36:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:36:06,589 INFO L280 TraceCheckUtils]: 0: Hoare triple {47#true} assume true; {47#true} is VALID [2020-07-10 18:36:06,590 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {47#true} {47#true} #57#return; {47#true} is VALID [2020-07-10 18:36:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:36:06,658 INFO L280 TraceCheckUtils]: 0: Hoare triple {47#true} ~m := #in~m; {58#(= ackermann_~m |ackermann_#in~m|)} is VALID [2020-07-10 18:36:06,659 INFO L280 TraceCheckUtils]: 1: Hoare triple {58#(= ackermann_~m |ackermann_#in~m|)} ~n := #in~n; {58#(= ackermann_~m |ackermann_#in~m|)} is VALID [2020-07-10 18:36:06,660 INFO L280 TraceCheckUtils]: 2: Hoare triple {58#(= ackermann_~m |ackermann_#in~m|)} assume 0 == ~m; {59#(= 0 |ackermann_#in~m|)} is VALID [2020-07-10 18:36:06,661 INFO L280 TraceCheckUtils]: 3: Hoare triple {59#(= 0 |ackermann_#in~m|)} #res := 1 + ~n; {59#(= 0 |ackermann_#in~m|)} is VALID [2020-07-10 18:36:06,662 INFO L280 TraceCheckUtils]: 4: Hoare triple {59#(= 0 |ackermann_#in~m|)} assume true; {59#(= 0 |ackermann_#in~m|)} is VALID [2020-07-10 18:36:06,665 INFO L275 TraceCheckUtils]: 5: Hoare quadruple {59#(= 0 |ackermann_#in~m|)} {47#true} #67#return; {57#(<= main_~m~0 0)} is VALID [2020-07-10 18:36:06,666 INFO L263 TraceCheckUtils]: 0: Hoare triple {47#true} call ULTIMATE.init(); {47#true} is VALID [2020-07-10 18:36:06,666 INFO L280 TraceCheckUtils]: 1: Hoare triple {47#true} assume true; {47#true} is VALID [2020-07-10 18:36:06,666 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {47#true} {47#true} #57#return; {47#true} is VALID [2020-07-10 18:36:06,667 INFO L263 TraceCheckUtils]: 3: Hoare triple {47#true} call #t~ret6 := main(); {47#true} is VALID [2020-07-10 18:36:06,667 INFO L280 TraceCheckUtils]: 4: Hoare triple {47#true} assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; {47#true} is VALID [2020-07-10 18:36:06,668 INFO L280 TraceCheckUtils]: 5: Hoare triple {47#true} ~m~0 := #t~nondet3; {47#true} is VALID [2020-07-10 18:36:06,668 INFO L280 TraceCheckUtils]: 6: Hoare triple {47#true} havoc #t~nondet3; {47#true} is VALID [2020-07-10 18:36:06,669 INFO L280 TraceCheckUtils]: 7: Hoare triple {47#true} assume !(~m~0 < 0 || ~m~0 > 3); {47#true} is VALID [2020-07-10 18:36:06,669 INFO L280 TraceCheckUtils]: 8: Hoare triple {47#true} assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647; {47#true} is VALID [2020-07-10 18:36:06,669 INFO L280 TraceCheckUtils]: 9: Hoare triple {47#true} ~n~0 := #t~nondet4; {47#true} is VALID [2020-07-10 18:36:06,670 INFO L280 TraceCheckUtils]: 10: Hoare triple {47#true} havoc #t~nondet4; {47#true} is VALID [2020-07-10 18:36:06,670 INFO L280 TraceCheckUtils]: 11: Hoare triple {47#true} assume !(~n~0 < 0 || ~n~0 > 23); {47#true} is VALID [2020-07-10 18:36:06,671 INFO L263 TraceCheckUtils]: 12: Hoare triple {47#true} call #t~ret5 := ackermann(~m~0, ~n~0); {47#true} is VALID [2020-07-10 18:36:06,672 INFO L280 TraceCheckUtils]: 13: Hoare triple {47#true} ~m := #in~m; {58#(= ackermann_~m |ackermann_#in~m|)} is VALID [2020-07-10 18:36:06,673 INFO L280 TraceCheckUtils]: 14: Hoare triple {58#(= ackermann_~m |ackermann_#in~m|)} ~n := #in~n; {58#(= ackermann_~m |ackermann_#in~m|)} is VALID [2020-07-10 18:36:06,674 INFO L280 TraceCheckUtils]: 15: Hoare triple {58#(= ackermann_~m |ackermann_#in~m|)} assume 0 == ~m; {59#(= 0 |ackermann_#in~m|)} is VALID [2020-07-10 18:36:06,675 INFO L280 TraceCheckUtils]: 16: Hoare triple {59#(= 0 |ackermann_#in~m|)} #res := 1 + ~n; {59#(= 0 |ackermann_#in~m|)} is VALID [2020-07-10 18:36:06,676 INFO L280 TraceCheckUtils]: 17: Hoare triple {59#(= 0 |ackermann_#in~m|)} assume true; {59#(= 0 |ackermann_#in~m|)} is VALID [2020-07-10 18:36:06,678 INFO L275 TraceCheckUtils]: 18: Hoare quadruple {59#(= 0 |ackermann_#in~m|)} {47#true} #67#return; {57#(<= main_~m~0 0)} is VALID [2020-07-10 18:36:06,679 INFO L280 TraceCheckUtils]: 19: Hoare triple {57#(<= main_~m~0 0)} assume -2147483648 <= #t~ret5 && #t~ret5 <= 2147483647; {57#(<= main_~m~0 0)} is VALID [2020-07-10 18:36:06,680 INFO L280 TraceCheckUtils]: 20: Hoare triple {57#(<= main_~m~0 0)} ~result~0 := #t~ret5; {57#(<= main_~m~0 0)} is VALID [2020-07-10 18:36:06,681 INFO L280 TraceCheckUtils]: 21: Hoare triple {57#(<= main_~m~0 0)} havoc #t~ret5; {57#(<= main_~m~0 0)} is VALID [2020-07-10 18:36:06,683 INFO L280 TraceCheckUtils]: 22: Hoare triple {57#(<= main_~m~0 0)} assume !((~m~0 < 2 || ~n~0 < 2) || ~result~0 >= 7); {48#false} is VALID [2020-07-10 18:36:06,683 INFO L280 TraceCheckUtils]: 23: Hoare triple {48#false} assume !false; {48#false} is VALID [2020-07-10 18:36:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-10 18:36:06,687 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-10 18:36:06,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152194087] [2020-07-10 18:36:06,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 18:36:06,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-10 18:36:06,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7843325] [2020-07-10 18:36:06,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-10 18:36:06,702 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 18:36:06,706 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-10 18:36:06,758 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:36:06,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-10 18:36:06,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-10 18:36:06,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-10 18:36:06,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-10 18:36:06,771 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 5 states. [2020-07-10 18:36:07,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:36:07,242 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2020-07-10 18:36:07,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-10 18:36:07,243 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-10 18:36:07,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 18:36:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 18:36:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2020-07-10 18:36:07,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 18:36:07,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2020-07-10 18:36:07,264 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 110 transitions. [2020-07-10 18:36:07,419 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 110 edges. 110 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:36:07,434 INFO L225 Difference]: With dead ends: 88 [2020-07-10 18:36:07,435 INFO L226 Difference]: Without dead ends: 45 [2020-07-10 18:36:07,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-10 18:36:07,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-10 18:36:07,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-10 18:36:07,518 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 18:36:07,519 INFO L82 GeneralOperation]: Start isEquivalent. First operand 45 states. Second operand 45 states. [2020-07-10 18:36:07,520 INFO L74 IsIncluded]: Start isIncluded. First operand 45 states. Second operand 45 states. [2020-07-10 18:36:07,520 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 45 states. [2020-07-10 18:36:07,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:36:07,527 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-07-10 18:36:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-07-10 18:36:07,530 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:36:07,530 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:36:07,530 INFO L74 IsIncluded]: Start isIncluded. First operand 45 states. Second operand 45 states. [2020-07-10 18:36:07,530 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 45 states. [2020-07-10 18:36:07,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:36:07,536 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-07-10 18:36:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-07-10 18:36:07,538 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:36:07,538 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:36:07,539 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 18:36:07,539 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 18:36:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-10 18:36:07,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-07-10 18:36:07,545 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 24 [2020-07-10 18:36:07,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 18:36:07,545 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-07-10 18:36:07,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-10 18:36:07,546 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 45 states and 52 transitions. [2020-07-10 18:36:07,614 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 52 edges. 52 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:36:07,614 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-07-10 18:36:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-10 18:36:07,616 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 18:36:07,616 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-10 18:36:07,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-10 18:36:07,617 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 18:36:07,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 18:36:07,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1574290279, now seen corresponding path program 1 times [2020-07-10 18:36:07,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 18:36:07,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792841324] [2020-07-10 18:36:07,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-10 18:36:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-10 18:36:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-10 18:36:07,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-10 18:36:07,817 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: oldVar in procedure where it is not modified? at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.IcfgProgramExecutionBuilder.addValueAtVarAssignmentPosition(IcfgProgramExecutionBuilder.java:114) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.computeRcfgProgramExecution(TraceCheck.java:391) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.computeRcfgProgramExecutionAndDecodeBranches(TraceCheck.java:349) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.computeRcfgProgramExecutionAndDecodeBranches(TraceCheck.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:96) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:100) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolantsCraigNested(Interpolator.java:146) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolants(Interpolator.java:102) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:279) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-10 18:36:07,826 INFO L168 Benchmark]: Toolchain (without parser) took 2334.78 ms. Allocated memory was 142.1 MB in the beginning and 226.0 MB in the end (delta: 83.9 MB). Free memory was 99.3 MB in the beginning and 124.9 MB in the end (delta: -25.6 MB). Peak memory consumption was 58.3 MB. Max. memory is 7.1 GB. [2020-07-10 18:36:07,828 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 142.1 MB. Free memory was 117.5 MB in the beginning and 117.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-10 18:36:07,830 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.76 ms. Allocated memory is still 142.1 MB. Free memory was 99.1 MB in the beginning and 89.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-10 18:36:07,831 INFO L168 Benchmark]: Boogie Preprocessor took 32.05 ms. Allocated memory is still 142.1 MB. Free memory was 89.2 MB in the beginning and 87.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-10 18:36:07,832 INFO L168 Benchmark]: RCFGBuilder took 536.91 ms. Allocated memory was 142.1 MB in the beginning and 199.2 MB in the end (delta: 57.1 MB). Free memory was 87.6 MB in the beginning and 155.7 MB in the end (delta: -68.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-10 18:36:07,834 INFO L168 Benchmark]: TraceAbstraction took 1527.87 ms. Allocated memory was 199.2 MB in the beginning and 226.0 MB in the end (delta: 26.7 MB). Free memory was 155.7 MB in the beginning and 124.9 MB in the end (delta: 30.8 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. [2020-07-10 18:36:07,847 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 142.1 MB. Free memory was 117.5 MB in the beginning and 117.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 232.76 ms. Allocated memory is still 142.1 MB. Free memory was 99.1 MB in the beginning and 89.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.05 ms. Allocated memory is still 142.1 MB. Free memory was 89.2 MB in the beginning and 87.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 536.91 ms. Allocated memory was 142.1 MB in the beginning and 199.2 MB in the end (delta: 57.1 MB). Free memory was 87.6 MB in the beginning and 155.7 MB in the end (delta: -68.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1527.87 ms. Allocated memory was 199.2 MB in the beginning and 226.0 MB in the end (delta: 26.7 MB). Free memory was 155.7 MB in the beginning and 124.9 MB in the end (delta: 30.8 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: oldVar in procedure where it is not modified? de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: oldVar in procedure where it is not modified?: de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.IcfgProgramExecutionBuilder.addValueAtVarAssignmentPosition(IcfgProgramExecutionBuilder.java:114) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...