/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/Ackermann03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-18 00:13:58,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-18 00:13:58,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-18 00:13:58,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-18 00:13:58,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-18 00:13:58,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-18 00:13:58,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-18 00:13:58,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-18 00:13:58,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-18 00:13:58,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-18 00:13:58,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-18 00:13:58,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-18 00:13:58,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-18 00:13:58,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-18 00:13:58,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-18 00:13:58,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-18 00:13:58,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-18 00:13:58,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-18 00:13:58,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-18 00:13:58,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-18 00:13:58,397 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-18 00:13:58,425 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-18 00:13:58,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-18 00:13:58,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-18 00:13:58,430 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-18 00:13:58,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-18 00:13:58,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-18 00:13:58,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-18 00:13:58,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-18 00:13:58,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-18 00:13:58,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-18 00:13:58,433 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-18 00:13:58,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-18 00:13:58,433 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-18 00:13:58,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-18 00:13:58,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-18 00:13:58,434 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-18 00:13:58,434 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-18 00:13:58,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-18 00:13:58,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-18 00:13:58,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-18 00:13:58,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-18 00:13:58,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-18 00:13:58,437 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-18 00:13:58,745 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-18 00:13:58,764 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-18 00:13:58,770 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-18 00:13:58,772 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-18 00:13:58,772 INFO L275 PluginConnector]: CDTParser initialized [2020-07-18 00:13:58,773 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-18 00:13:58,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ab7b866c/1c159c6d32b34851823147476adc9d6c/FLAGf92fe7c7d [2020-07-18 00:13:59,282 INFO L306 CDTParser]: Found 1 translation units. [2020-07-18 00:13:59,283 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-18 00:13:59,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ab7b866c/1c159c6d32b34851823147476adc9d6c/FLAGf92fe7c7d [2020-07-18 00:13:59,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ab7b866c/1c159c6d32b34851823147476adc9d6c [2020-07-18 00:13:59,668 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-18 00:13:59,671 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-18 00:13:59,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-18 00:13:59,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-18 00:13:59,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-18 00:13:59,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 12:13:59" (1/1) ... [2020-07-18 00:13:59,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7865aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:13:59, skipping insertion in model container [2020-07-18 00:13:59,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 12:13:59" (1/1) ... [2020-07-18 00:13:59,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-18 00:13:59,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-18 00:13:59,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 00:13:59,879 INFO L203 MainTranslator]: Completed pre-run [2020-07-18 00:13:59,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 00:13:59,914 INFO L208 MainTranslator]: Completed translation [2020-07-18 00:13:59,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:13:59 WrapperNode [2020-07-18 00:13:59,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-18 00:13:59,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-18 00:13:59,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-18 00:13:59,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-18 00:13:59,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:13:59" (1/1) ... [2020-07-18 00:13:59,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:13:59" (1/1) ... [2020-07-18 00:13:59,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:13:59" (1/1) ... [2020-07-18 00:13:59,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:13:59" (1/1) ... [2020-07-18 00:13:59,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:13:59" (1/1) ... [2020-07-18 00:13:59,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:13:59" (1/1) ... [2020-07-18 00:13:59,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:13:59" (1/1) ... [2020-07-18 00:13:59,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-18 00:13:59,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-18 00:13:59,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-18 00:13:59,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-18 00:13:59,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:13:59" (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 [2020-07-18 00:14:00,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-18 00:14:00,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-18 00:14:00,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-18 00:14:00,113 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-18 00:14:00,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-18 00:14:00,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-18 00:14:00,114 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-18 00:14:00,114 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-18 00:14:00,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-18 00:14:00,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-18 00:14:00,528 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-18 00:14:00,529 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-18 00:14:00,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 12:14:00 BoogieIcfgContainer [2020-07-18 00:14:00,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-18 00:14:00,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-18 00:14:00,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-18 00:14:00,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-18 00:14:00,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.07 12:13:59" (1/3) ... [2020-07-18 00:14:00,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56657c57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 12:14:00, skipping insertion in model container [2020-07-18 00:14:00,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:13:59" (2/3) ... [2020-07-18 00:14:00,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56657c57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 12:14:00, skipping insertion in model container [2020-07-18 00:14:00,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 12:14:00" (3/3) ... [2020-07-18 00:14:00,543 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2020-07-18 00:14:00,553 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-18 00:14:00,561 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-18 00:14:00,574 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-18 00:14:00,595 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-18 00:14:00,595 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-18 00:14:00,595 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-18 00:14:00,596 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-18 00:14:00,596 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-18 00:14:00,596 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-18 00:14:00,596 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-18 00:14:00,596 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-18 00:14:00,612 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-07-18 00:14:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-18 00:14:00,624 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 00:14:00,625 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] [2020-07-18 00:14:00,626 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 00:14:00,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 00:14:00,632 INFO L82 PathProgramCache]: Analyzing trace with hash -852610024, now seen corresponding path program 1 times [2020-07-18 00:14:00,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 00:14:00,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585621857] [2020-07-18 00:14:00,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 00:14:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:14:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:14:00,855 INFO L280 TraceCheckUtils]: 0: Hoare triple {47#true} assume true; {47#true} is VALID [2020-07-18 00:14:00,856 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {47#true} {47#true} #57#return; {47#true} is VALID [2020-07-18 00:14:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:14:00,915 INFO L280 TraceCheckUtils]: 0: Hoare triple {47#true} ~m := #in~m; {58#(= ackermann_~m |ackermann_#in~m|)} is VALID [2020-07-18 00:14:00,917 INFO L280 TraceCheckUtils]: 1: Hoare triple {58#(= ackermann_~m |ackermann_#in~m|)} ~n := #in~n; {58#(= ackermann_~m |ackermann_#in~m|)} is VALID [2020-07-18 00:14:00,918 INFO L280 TraceCheckUtils]: 2: Hoare triple {58#(= ackermann_~m |ackermann_#in~m|)} assume 0 == ~m; {59#(= 0 |ackermann_#in~m|)} is VALID [2020-07-18 00:14:00,920 INFO L280 TraceCheckUtils]: 3: Hoare triple {59#(= 0 |ackermann_#in~m|)} #res := 1 + ~n; {59#(= 0 |ackermann_#in~m|)} is VALID [2020-07-18 00:14:00,921 INFO L280 TraceCheckUtils]: 4: Hoare triple {59#(= 0 |ackermann_#in~m|)} assume true; {59#(= 0 |ackermann_#in~m|)} is VALID [2020-07-18 00:14:00,924 INFO L275 TraceCheckUtils]: 5: Hoare quadruple {59#(= 0 |ackermann_#in~m|)} {47#true} #67#return; {57#(<= main_~m~0 0)} is VALID [2020-07-18 00:14:00,925 INFO L263 TraceCheckUtils]: 0: Hoare triple {47#true} call ULTIMATE.init(); {47#true} is VALID [2020-07-18 00:14:00,925 INFO L280 TraceCheckUtils]: 1: Hoare triple {47#true} assume true; {47#true} is VALID [2020-07-18 00:14:00,926 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {47#true} {47#true} #57#return; {47#true} is VALID [2020-07-18 00:14:00,926 INFO L263 TraceCheckUtils]: 3: Hoare triple {47#true} call #t~ret6 := main(); {47#true} is VALID [2020-07-18 00:14:00,927 INFO L280 TraceCheckUtils]: 4: Hoare triple {47#true} assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; {47#true} is VALID [2020-07-18 00:14:00,927 INFO L280 TraceCheckUtils]: 5: Hoare triple {47#true} ~m~0 := #t~nondet3; {47#true} is VALID [2020-07-18 00:14:00,927 INFO L280 TraceCheckUtils]: 6: Hoare triple {47#true} havoc #t~nondet3; {47#true} is VALID [2020-07-18 00:14:00,928 INFO L280 TraceCheckUtils]: 7: Hoare triple {47#true} assume !(~m~0 < 0 || ~m~0 > 3); {47#true} is VALID [2020-07-18 00:14:00,928 INFO L280 TraceCheckUtils]: 8: Hoare triple {47#true} assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647; {47#true} is VALID [2020-07-18 00:14:00,929 INFO L280 TraceCheckUtils]: 9: Hoare triple {47#true} ~n~0 := #t~nondet4; {47#true} is VALID [2020-07-18 00:14:00,929 INFO L280 TraceCheckUtils]: 10: Hoare triple {47#true} havoc #t~nondet4; {47#true} is VALID [2020-07-18 00:14:00,930 INFO L280 TraceCheckUtils]: 11: Hoare triple {47#true} assume !(~n~0 < 0 || ~n~0 > 23); {47#true} is VALID [2020-07-18 00:14:00,930 INFO L263 TraceCheckUtils]: 12: Hoare triple {47#true} call #t~ret5 := ackermann(~m~0, ~n~0); {47#true} is VALID [2020-07-18 00:14:00,932 INFO L280 TraceCheckUtils]: 13: Hoare triple {47#true} ~m := #in~m; {58#(= ackermann_~m |ackermann_#in~m|)} is VALID [2020-07-18 00:14:00,933 INFO L280 TraceCheckUtils]: 14: Hoare triple {58#(= ackermann_~m |ackermann_#in~m|)} ~n := #in~n; {58#(= ackermann_~m |ackermann_#in~m|)} is VALID [2020-07-18 00:14:00,934 INFO L280 TraceCheckUtils]: 15: Hoare triple {58#(= ackermann_~m |ackermann_#in~m|)} assume 0 == ~m; {59#(= 0 |ackermann_#in~m|)} is VALID [2020-07-18 00:14:00,936 INFO L280 TraceCheckUtils]: 16: Hoare triple {59#(= 0 |ackermann_#in~m|)} #res := 1 + ~n; {59#(= 0 |ackermann_#in~m|)} is VALID [2020-07-18 00:14:00,937 INFO L280 TraceCheckUtils]: 17: Hoare triple {59#(= 0 |ackermann_#in~m|)} assume true; {59#(= 0 |ackermann_#in~m|)} is VALID [2020-07-18 00:14:00,940 INFO L275 TraceCheckUtils]: 18: Hoare quadruple {59#(= 0 |ackermann_#in~m|)} {47#true} #67#return; {57#(<= main_~m~0 0)} is VALID [2020-07-18 00:14:00,941 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 [2020-07-18 00:14:00,943 INFO L280 TraceCheckUtils]: 20: Hoare triple {57#(<= main_~m~0 0)} ~result~0 := #t~ret5; {57#(<= main_~m~0 0)} is VALID [2020-07-18 00:14:00,944 INFO L280 TraceCheckUtils]: 21: Hoare triple {57#(<= main_~m~0 0)} havoc #t~ret5; {57#(<= main_~m~0 0)} is VALID [2020-07-18 00:14:00,945 INFO L280 TraceCheckUtils]: 22: Hoare triple {57#(<= main_~m~0 0)} assume !((2 != ~m~0 || 2 != ~n~0) || 7 == ~result~0); {48#false} is VALID [2020-07-18 00:14:00,945 INFO L280 TraceCheckUtils]: 23: Hoare triple {48#false} assume !false; {48#false} is VALID [2020-07-18 00:14:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-18 00:14:00,962 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-18 00:14:00,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585621857] [2020-07-18 00:14:00,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-18 00:14:00,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-18 00:14:00,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846700613] [2020-07-18 00:14:00,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-18 00:14:00,978 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-18 00:14:00,982 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-18 00:14:01,033 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 00:14:01,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-18 00:14:01,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-18 00:14:01,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-18 00:14:01,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-18 00:14:01,045 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 5 states. [2020-07-18 00:14:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 00:14:01,647 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2020-07-18 00:14:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-18 00:14:01,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-18 00:14:01,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-18 00:14:01,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-18 00:14:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2020-07-18 00:14:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-18 00:14:01,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2020-07-18 00:14:01,671 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 110 transitions. [2020-07-18 00:14:01,838 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 110 edges. 110 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 00:14:01,855 INFO L225 Difference]: With dead ends: 88 [2020-07-18 00:14:01,855 INFO L226 Difference]: Without dead ends: 45 [2020-07-18 00:14:01,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-18 00:14:01,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-18 00:14:01,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-18 00:14:01,945 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-18 00:14:01,945 INFO L82 GeneralOperation]: Start isEquivalent. First operand 45 states. Second operand 45 states. [2020-07-18 00:14:01,946 INFO L74 IsIncluded]: Start isIncluded. First operand 45 states. Second operand 45 states. [2020-07-18 00:14:01,947 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 45 states. [2020-07-18 00:14:01,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 00:14:01,955 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-07-18 00:14:01,955 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-07-18 00:14:01,957 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 00:14:01,957 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 00:14:01,958 INFO L74 IsIncluded]: Start isIncluded. First operand 45 states. Second operand 45 states. [2020-07-18 00:14:01,958 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 45 states. [2020-07-18 00:14:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 00:14:01,964 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-07-18 00:14:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-07-18 00:14:01,969 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 00:14:01,969 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 00:14:01,970 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-18 00:14:01,970 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-18 00:14:01,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-18 00:14:01,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-07-18 00:14:01,983 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 24 [2020-07-18 00:14:01,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-18 00:14:01,986 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-07-18 00:14:01,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-18 00:14:01,987 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 45 states and 52 transitions. [2020-07-18 00:14:02,060 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 52 edges. 52 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 00:14:02,060 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-07-18 00:14:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-18 00:14:02,062 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 00:14:02,062 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] [2020-07-18 00:14:02,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-18 00:14:02,063 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 00:14:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 00:14:02,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1574290279, now seen corresponding path program 1 times [2020-07-18 00:14:02,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 00:14:02,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101545757] [2020-07-18 00:14:02,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 00:14:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-18 00:14:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-18 00:14:02,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-18 00:14:02,257 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:291) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:191) 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) [2020-07-18 00:14:02,263 INFO L168 Benchmark]: Toolchain (without parser) took 2592.87 ms. Allocated memory was 136.8 MB in the beginning and 232.3 MB in the end (delta: 95.4 MB). Free memory was 102.4 MB in the beginning and 130.7 MB in the end (delta: -28.3 MB). Peak memory consumption was 67.1 MB. Max. memory is 7.1 GB. [2020-07-18 00:14:02,264 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-18 00:14:02,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.78 ms. Allocated memory is still 136.8 MB. Free memory was 102.0 MB in the beginning and 92.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-18 00:14:02,266 INFO L168 Benchmark]: Boogie Preprocessor took 32.42 ms. Allocated memory is still 136.8 MB. Free memory was 92.2 MB in the beginning and 90.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-18 00:14:02,267 INFO L168 Benchmark]: RCFGBuilder took 585.33 ms. Allocated memory was 136.8 MB in the beginning and 202.9 MB in the end (delta: 66.1 MB). Free memory was 90.7 MB in the beginning and 160.7 MB in the end (delta: -70.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-18 00:14:02,268 INFO L168 Benchmark]: TraceAbstraction took 1723.93 ms. Allocated memory was 202.9 MB in the beginning and 232.3 MB in the end (delta: 29.4 MB). Free memory was 160.0 MB in the beginning and 130.7 MB in the end (delta: 29.3 MB). Peak memory consumption was 58.7 MB. Max. memory is 7.1 GB. [2020-07-18 00:14:02,273 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 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.78 ms. Allocated memory is still 136.8 MB. Free memory was 102.0 MB in the beginning and 92.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.42 ms. Allocated memory is still 136.8 MB. Free memory was 92.2 MB in the beginning and 90.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 585.33 ms. Allocated memory was 136.8 MB in the beginning and 202.9 MB in the end (delta: 66.1 MB). Free memory was 90.7 MB in the beginning and 160.7 MB in the end (delta: -70.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1723.93 ms. Allocated memory was 202.9 MB in the beginning and 232.3 MB in the end (delta: 29.4 MB). Free memory was 160.0 MB in the beginning and 130.7 MB in the end (delta: 29.3 MB). Peak memory consumption was 58.7 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...