/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Addition02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 15:48:44,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 15:48:44,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 15:48:44,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 15:48:44,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 15:48:44,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 15:48:44,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 15:48:44,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 15:48:44,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 15:48:44,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 15:48:44,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 15:48:44,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 15:48:44,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 15:48:44,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 15:48:44,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 15:48:44,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 15:48:44,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 15:48:44,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 15:48:44,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 15:48:44,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 15:48:44,694 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-21 15:48:44,720 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 15:48:44,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 15:48:44,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 15:48:44,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 15:48:44,722 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 15:48:44,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 15:48:44,722 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 15:48:44,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 15:48:44,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 15:48:44,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 15:48:44,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 15:48:44,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 15:48:44,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 15:48:44,724 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 15:48:44,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 15:48:44,724 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 15:48:44,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 15:48:44,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 15:48:44,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 15:48:44,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 15:48:44,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 15:48:44,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 15:48:44,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 15:48:44,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 15:48:44,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 15:48:44,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 15:48:44,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 15:48:44,727 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 15:48:44,727 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 15:48:45,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 15:48:45,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 15:48:45,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 15:48:45,139 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 15:48:45,139 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 15:48:45,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition02.c [2021-02-21 15:48:45,212 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a950c4da/9e4702192cd54fbd9e9f217edb5cf637/FLAG43c547590 [2021-02-21 15:48:45,830 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 15:48:45,831 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition02.c [2021-02-21 15:48:45,838 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a950c4da/9e4702192cd54fbd9e9f217edb5cf637/FLAG43c547590 [2021-02-21 15:48:46,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a950c4da/9e4702192cd54fbd9e9f217edb5cf637 [2021-02-21 15:48:46,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 15:48:46,214 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 15:48:46,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 15:48:46,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 15:48:46,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 15:48:46,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:48:46" (1/1) ... [2021-02-21 15:48:46,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2633761f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:46, skipping insertion in model container [2021-02-21 15:48:46,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:48:46" (1/1) ... [2021-02-21 15:48:46,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 15:48:46,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 15:48:46,474 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition02.c[1124,1137] [2021-02-21 15:48:46,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 15:48:46,510 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 15:48:46,538 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition02.c[1124,1137] [2021-02-21 15:48:46,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 15:48:46,566 INFO L208 MainTranslator]: Completed translation [2021-02-21 15:48:46,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:46 WrapperNode [2021-02-21 15:48:46,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 15:48:46,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 15:48:46,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 15:48:46,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 15:48:46,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:46" (1/1) ... [2021-02-21 15:48:46,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:46" (1/1) ... [2021-02-21 15:48:46,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:46" (1/1) ... [2021-02-21 15:48:46,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:46" (1/1) ... [2021-02-21 15:48:46,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:46" (1/1) ... [2021-02-21 15:48:46,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:46" (1/1) ... [2021-02-21 15:48:46,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:46" (1/1) ... [2021-02-21 15:48:46,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 15:48:46,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 15:48:46,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 15:48:46,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 15:48:46,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:46" (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 [2021-02-21 15:48:46,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 15:48:46,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 15:48:46,756 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 15:48:46,756 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2021-02-21 15:48:46,756 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 15:48:46,756 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 15:48:46,757 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 15:48:46,757 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 15:48:46,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 15:48:46,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 15:48:46,758 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2021-02-21 15:48:46,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 15:48:46,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 15:48:46,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 15:48:46,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 15:48:46,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 15:48:46,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 15:48:46,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 15:48:47,143 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 15:48:47,146 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 15:48:47,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:48:47 BoogieIcfgContainer [2021-02-21 15:48:47,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 15:48:47,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 15:48:47,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 15:48:47,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 15:48:47,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 03:48:46" (1/3) ... [2021-02-21 15:48:47,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfd8fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 03:48:47, skipping insertion in model container [2021-02-21 15:48:47,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:48:46" (2/3) ... [2021-02-21 15:48:47,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfd8fe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 03:48:47, skipping insertion in model container [2021-02-21 15:48:47,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:48:47" (3/3) ... [2021-02-21 15:48:47,163 INFO L111 eAbstractionObserver]: Analyzing ICFG Addition02.c [2021-02-21 15:48:47,179 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 15:48:47,187 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 15:48:47,226 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 15:48:47,262 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 15:48:47,262 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 15:48:47,262 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 15:48:47,263 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 15:48:47,263 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 15:48:47,287 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 15:48:47,287 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 15:48:47,288 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 15:48:47,334 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2021-02-21 15:48:47,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-21 15:48:47,349 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:48:47,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 15:48:47,350 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:48:47,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:48:47,365 INFO L82 PathProgramCache]: Analyzing trace with hash -125880268, now seen corresponding path program 1 times [2021-02-21 15:48:47,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:48:47,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935891665] [2021-02-21 15:48:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:48:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:48:47,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:47,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:47,627 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:47,628 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:47,635 WARN L141 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size [2021-02-21 15:48:47,636 WARN L147 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size 1 [2021-02-21 15:48:47,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:47,640 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-21 15:48:47,665 WARN L141 QuantifierPusher]: treesize reduction 14, result has 58.8 percent of original size [2021-02-21 15:48:47,667 WARN L147 QuantifierPusher]: treesize reduction 14, result has 58.8 percent of original size 20 [2021-02-21 15:48:47,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:47,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:47,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 15:48:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:48:47,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:47,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:47,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-21 15:48:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:48:47,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:47,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 15:48:47,844 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:47,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 15:48:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 15:48:47,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935891665] [2021-02-21 15:48:47,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 15:48:47,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 15:48:47,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997671377] [2021-02-21 15:48:47,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 15:48:47,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 15:48:47,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 15:48:47,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-21 15:48:47,901 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2021-02-21 15:48:48,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 15:48:48,456 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-02-21 15:48:48,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 15:48:48,459 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2021-02-21 15:48:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 15:48:48,469 INFO L225 Difference]: With dead ends: 39 [2021-02-21 15:48:48,469 INFO L226 Difference]: Without dead ends: 25 [2021-02-21 15:48:48,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-21 15:48:48,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-02-21 15:48:48,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-02-21 15:48:48,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-02-21 15:48:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-02-21 15:48:48,520 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 16 [2021-02-21 15:48:48,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 15:48:48,520 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-02-21 15:48:48,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 15:48:48,521 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-02-21 15:48:48,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-21 15:48:48,523 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:48:48,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 15:48:48,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 15:48:48,524 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:48:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:48:48,524 INFO L82 PathProgramCache]: Analyzing trace with hash -943001011, now seen corresponding path program 1 times [2021-02-21 15:48:48,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:48:48,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139037006] [2021-02-21 15:48:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:48:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:48:48,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:48,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:48,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:48,566 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:48,567 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-21 15:48:48,568 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-21 15:48:48,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:48,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:48,577 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:48,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:48,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 15:48:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:48:48,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:48,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 15:48:48,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-21 15:48:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 15:48:48,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:48,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 15:48:48,692 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:48,693 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 15:48:48,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:48,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-21 15:48:48,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 15:48:48,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 15:48:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 15:48:48,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139037006] [2021-02-21 15:48:48,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 15:48:48,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 15:48:48,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050468510] [2021-02-21 15:48:48,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 15:48:48,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 15:48:48,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 15:48:48,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-21 15:48:48,743 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 8 states. [2021-02-21 15:48:49,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 15:48:49,003 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-02-21 15:48:49,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 15:48:49,003 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2021-02-21 15:48:49,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 15:48:49,005 INFO L225 Difference]: With dead ends: 36 [2021-02-21 15:48:49,005 INFO L226 Difference]: Without dead ends: 22 [2021-02-21 15:48:49,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-21 15:48:49,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-02-21 15:48:49,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-02-21 15:48:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-02-21 15:48:49,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-02-21 15:48:49,013 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-02-21 15:48:49,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 15:48:49,014 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-02-21 15:48:49,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 15:48:49,014 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-02-21 15:48:49,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 15:48:49,015 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 15:48:49,015 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 15:48:49,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 15:48:49,016 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 15:48:49,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 15:48:49,016 INFO L82 PathProgramCache]: Analyzing trace with hash 12462718, now seen corresponding path program 1 times [2021-02-21 15:48:49,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 15:48:49,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146731256] [2021-02-21 15:48:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 15:48:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 15:48:49,040 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 15:48:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 15:48:49,062 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 15:48:49,088 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 15:48:49,088 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 15:48:49,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 15:48:49,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 03:48:49 BoogieIcfgContainer [2021-02-21 15:48:49,122 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 15:48:49,124 INFO L168 Benchmark]: Toolchain (without parser) took 2922.66 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 132.9 MB in the beginning and 114.1 MB in the end (delta: 18.8 MB). Peak memory consumption was 51.4 MB. Max. memory is 8.0 GB. [2021-02-21 15:48:49,124 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 157.3 MB. Free memory is still 128.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 15:48:49,125 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.85 ms. Allocated memory is still 157.3 MB. Free memory was 131.7 MB in the beginning and 122.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 15:48:49,126 INFO L168 Benchmark]: Boogie Preprocessor took 59.67 ms. Allocated memory is still 157.3 MB. Free memory was 122.3 MB in the beginning and 121.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 15:48:49,127 INFO L168 Benchmark]: RCFGBuilder took 510.92 ms. Allocated memory is still 157.3 MB. Free memory was 121.0 MB in the beginning and 106.8 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-21 15:48:49,128 INFO L168 Benchmark]: TraceAbstraction took 1971.59 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 106.4 MB in the beginning and 114.1 MB in the end (delta: -7.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. [2021-02-21 15:48:49,131 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 157.3 MB. Free memory is still 128.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 347.85 ms. Allocated memory is still 157.3 MB. Free memory was 131.7 MB in the beginning and 122.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.67 ms. Allocated memory is still 157.3 MB. Free memory was 122.3 MB in the beginning and 121.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 510.92 ms. Allocated memory is still 157.3 MB. Free memory was 121.0 MB in the beginning and 106.8 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1971.59 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 106.4 MB in the beginning and 114.1 MB in the end (delta: -7.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 45]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L29] int m = __VERIFIER_nondet_int(); [L30] COND FALSE !(m < 0 || m > 1073741823) [L35] int n = __VERIFIER_nondet_int(); [L36] COND FALSE !(n < 0 || n > 1073741823) VAL [m=0, n=1] [L41] CALL, EXPR addition(m,n) VAL [\old(m)=0, \old(n)=1] [L16] COND FALSE !(n == 0) VAL [\old(m)=0, \old(n)=1, m=0, n=1] [L19] COND TRUE n > 0 VAL [\old(m)=0, \old(n)=1, m=0, n=1] [L20] CALL, EXPR addition(m+1, n-1) VAL [\old(m)=1, \old(n)=0] [L16] COND TRUE n == 0 [L17] return m; VAL [\old(m)=1, \old(n)=0, \result=1, m=1, n=0] [L20] RET, EXPR addition(m+1, n-1) VAL [\old(m)=0, \old(n)=1, addition(m+1, n-1)=1, m=0, n=1] [L20] return addition(m+1, n-1); [L41] RET, EXPR addition(m,n) VAL [addition(m,n)=1, m=0, n=1] [L41] int result = addition(m,n); [L42] COND FALSE !(result == m - n) VAL [m=0, n=1, result=1] [L45] reach_error() VAL [m=0, n=1, result=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 70 SDslu, 48 SDs, 0 SdLazy, 189 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 2797 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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...