/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/ldv-regression/test14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:26:31,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:26:31,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:26:31,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 18:26:32,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:26:32,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:26:32,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:26:32,004 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 [2020-10-23 18:26:32,033 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:26:32,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:26:32,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:26:32,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:26:32,035 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:26:32,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:26:32,036 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:26:32,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:26:32,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:26:32,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:26:32,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:26:32,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:26:32,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:26:32,038 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:26:32,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:26:32,038 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:26:32,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:26:32,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:26:32,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:26:32,039 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:26:32,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:26:32,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:26:32,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:26:32,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:26:32,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:26:32,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:26:32,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:26:32,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:26:32,041 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:26:32,041 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:26:32,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:26:32,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:26:32,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:26:32,496 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:26:32,497 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:26:32,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test14.c [2020-10-23 18:26:32,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/096da852d/ae42320c1dcb4565bb6bd9b92c525e0e/FLAGa6cffc6db [2020-10-23 18:26:33,178 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:26:33,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test14.c [2020-10-23 18:26:33,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/096da852d/ae42320c1dcb4565bb6bd9b92c525e0e/FLAGa6cffc6db [2020-10-23 18:26:33,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/096da852d/ae42320c1dcb4565bb6bd9b92c525e0e [2020-10-23 18:26:33,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:26:33,541 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:26:33,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:26:33,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:26:33,549 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:26:33,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:26:33" (1/1) ... [2020-10-23 18:26:33,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d9bf40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:33, skipping insertion in model container [2020-10-23 18:26:33,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:26:33" (1/1) ... [2020-10-23 18:26:33,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:26:33,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:26:33,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:26:33,793 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:26:33,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:26:33,830 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:26:33,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:33 WrapperNode [2020-10-23 18:26:33,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:26:33,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:26:33,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:26:33,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:26:33,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:33" (1/1) ... [2020-10-23 18:26:33,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:33" (1/1) ... [2020-10-23 18:26:33,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:33" (1/1) ... [2020-10-23 18:26:33,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:33" (1/1) ... [2020-10-23 18:26:33,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:33" (1/1) ... [2020-10-23 18:26:33,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:33" (1/1) ... [2020-10-23 18:26:33,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:33" (1/1) ... [2020-10-23 18:26:33,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:26:33,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:26:33,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:26:33,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:26:33,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:33" (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 [2020-10-23 18:26:33,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:26:33,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:26:33,953 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:26:33,953 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2020-10-23 18:26:33,953 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:26:33,953 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:26:33,953 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:26:33,954 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:26:33,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:26:33,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:26:33,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 18:26:33,954 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2020-10-23 18:26:33,955 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:26:33,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:26:33,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:26:33,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:26:33,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:26:33,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:26:33,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:26:34,406 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:26:34,406 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:26:34,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:26:34 BoogieIcfgContainer [2020-10-23 18:26:34,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:26:34,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:26:34,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:26:34,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:26:34,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:26:33" (1/3) ... [2020-10-23 18:26:34,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303521d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:26:34, skipping insertion in model container [2020-10-23 18:26:34,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:33" (2/3) ... [2020-10-23 18:26:34,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303521d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:26:34, skipping insertion in model container [2020-10-23 18:26:34,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:26:34" (3/3) ... [2020-10-23 18:26:34,424 INFO L111 eAbstractionObserver]: Analyzing ICFG test14.c [2020-10-23 18:26:34,438 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:26:34,443 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:26:34,457 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:26:34,500 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:26:34,500 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:26:34,500 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:26:34,500 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:26:34,501 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:26:34,501 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:26:34,501 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:26:34,501 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:26:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-23 18:26:34,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:26:34,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:34,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:26:34,531 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:34,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:34,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2072328177, now seen corresponding path program 1 times [2020-10-23 18:26:34,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:34,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998538971] [2020-10-23 18:26:34,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:34,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:35,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:26:35,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998538971] [2020-10-23 18:26:35,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:26:35,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:26:35,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001488769] [2020-10-23 18:26:35,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:26:35,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:35,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:26:35,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:26:35,048 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2020-10-23 18:26:35,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:35,189 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-23 18:26:35,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:26:35,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-23 18:26:35,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:35,199 INFO L225 Difference]: With dead ends: 34 [2020-10-23 18:26:35,199 INFO L226 Difference]: Without dead ends: 19 [2020-10-23 18:26:35,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:26:35,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-23 18:26:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-23 18:26:35,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-23 18:26:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-23 18:26:35,244 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-23 18:26:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:35,245 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-23 18:26:35,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:26:35,245 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-23 18:26:35,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:26:35,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:35,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:26:35,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:26:35,247 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:35,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:35,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1406594089, now seen corresponding path program 1 times [2020-10-23 18:26:35,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:35,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210972449] [2020-10-23 18:26:35,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:35,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:35,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:26:35,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210972449] [2020-10-23 18:26:35,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:26:35,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:26:35,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738365451] [2020-10-23 18:26:35,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:26:35,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:35,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:26:35,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:26:35,606 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-10-23 18:26:35,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:35,761 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-10-23 18:26:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:26:35,762 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-23 18:26:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:35,763 INFO L225 Difference]: With dead ends: 19 [2020-10-23 18:26:35,763 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:26:35,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:26:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:26:35,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:26:35,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:26:35,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:26:35,765 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-10-23 18:26:35,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:35,766 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:26:35,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:26:35,766 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:26:35,766 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:26:35,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:26:35,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:26:35,980 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-23 18:26:35,981 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 18:26:35,981 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-23 18:26:35,981 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-23 18:26:35,981 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:26:35,981 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |~#a~0.offset| |old(~#a~0.offset)|) (= |~#b~0.base| |old(~#b~0.base)|) (= |~#a~0.base| |old(~#a~0.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |old(#valid)| |#valid|) (= |#t~string5.base| |old(#t~string5.base)|) (= |~#b~0.offset| |old(~#b~0.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2020-10-23 18:26:35,982 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:26:35,982 INFO L274 CegarLoopResult]: For program point get_dummyFINAL(lines 9 12) no Hoare annotation was computed. [2020-10-23 18:26:35,983 INFO L274 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-10-23 18:26:35,984 INFO L277 CegarLoopResult]: At program point get_dummyENTRY(lines 9 12) the Hoare annotation is: true [2020-10-23 18:26:35,984 INFO L274 CegarLoopResult]: For program point get_dummyEXIT(lines 9 12) no Hoare annotation was computed. [2020-10-23 18:26:35,985 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:26:35,985 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:26:35,986 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:26:35,987 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:26:35,987 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 14 29) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-10-23 18:26:35,987 INFO L274 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-10-23 18:26:35,987 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 14 29) no Hoare annotation was computed. [2020-10-23 18:26:35,987 INFO L270 CegarLoopResult]: At program point L22(lines 14 29) the Hoare annotation is: false [2020-10-23 18:26:35,987 INFO L274 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-10-23 18:26:35,988 INFO L274 CegarLoopResult]: For program point L20(lines 20 21) no Hoare annotation was computed. [2020-10-23 18:26:35,988 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (not (= main_~pc~0.base 0)) [2020-10-23 18:26:35,988 INFO L274 CegarLoopResult]: For program point L21-2(line 21) no Hoare annotation was computed. [2020-10-23 18:26:35,988 INFO L274 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-10-23 18:26:35,988 INFO L274 CegarLoopResult]: For program point L20-2(lines 20 23) no Hoare annotation was computed. [2020-10-23 18:26:35,988 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 14 29) no Hoare annotation was computed. [2020-10-23 18:26:36,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:26:36 BoogieIcfgContainer [2020-10-23 18:26:36,003 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:26:36,006 INFO L168 Benchmark]: Toolchain (without parser) took 2468.93 ms. Allocated memory is still 168.8 MB. Free memory was 144.3 MB in the beginning and 115.8 MB in the end (delta: 28.4 MB). Peak memory consumption was 30.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:36,007 INFO L168 Benchmark]: CDTParser took 1.42 ms. Allocated memory is still 125.8 MB. Free memory was 99.9 MB in the beginning and 99.8 MB in the end (delta: 68.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:26:36,008 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.31 ms. Allocated memory is still 168.8 MB. Free memory was 143.6 MB in the beginning and 134.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:36,009 INFO L168 Benchmark]: Boogie Preprocessor took 36.69 ms. Allocated memory is still 168.8 MB. Free memory was 134.3 MB in the beginning and 132.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:36,010 INFO L168 Benchmark]: RCFGBuilder took 539.40 ms. Allocated memory is still 168.8 MB. Free memory was 132.8 MB in the beginning and 150.2 MB in the end (delta: -17.4 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:36,011 INFO L168 Benchmark]: TraceAbstraction took 1588.96 ms. Allocated memory is still 168.8 MB. Free memory was 149.9 MB in the beginning and 116.3 MB in the end (delta: 33.6 MB). Peak memory consumption was 34.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:36,014 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.42 ms. Allocated memory is still 125.8 MB. Free memory was 99.9 MB in the beginning and 99.8 MB in the end (delta: 68.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 286.31 ms. Allocated memory is still 168.8 MB. Free memory was 143.6 MB in the beginning and 134.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.69 ms. Allocated memory is still 168.8 MB. Free memory was 134.3 MB in the beginning and 132.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 539.40 ms. Allocated memory is still 168.8 MB. Free memory was 132.8 MB in the beginning and 150.2 MB in the end (delta: -17.4 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1588.96 ms. Allocated memory is still 168.8 MB. Free memory was 149.9 MB in the beginning and 116.3 MB in the end (delta: 33.6 MB). Peak memory consumption was 34.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 24 SDslu, 43 SDs, 0 SdLazy, 68 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 59 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 78 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 34 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 2201 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 correct! Received shutdown request...