/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-regression/test28-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:18:11,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:18:11,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:18:11,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:18:11,999 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:18:12,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:18:12,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:18:12,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:18:12,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:18:12,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:18:12,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:18:12,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:18:12,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:18:12,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:18:12,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:18:12,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:18:12,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:18:12,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:18:12,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:18:12,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:18:12,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:18:12,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:18:12,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:18:12,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:18:12,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:18:12,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:18:12,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:18:12,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:18:12,101 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:18:12,146 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:18:12,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:18:12,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:18:12,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:18:12,148 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:18:12,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:18:12,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:18:12,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:18:12,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:18:12,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:18:12,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:18:12,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:18:12,150 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:18:12,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:18:12,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:18:12,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:18:12,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:18:12,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:18:12,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:18:12,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:18:12,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:18:12,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:18:12,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:18:12,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:18:12,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:18:12,152 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:18:12,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:18:12,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:18:12,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:18:12,526 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:18:12,526 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:18:12,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test28-2.c [2020-12-23 06:18:12,615 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/da2e110c6/60d30bb8803748059eb3c9a0f05f193e/FLAGa8f238467 [2020-12-23 06:18:13,216 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:18:13,217 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test28-2.c [2020-12-23 06:18:13,224 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/da2e110c6/60d30bb8803748059eb3c9a0f05f193e/FLAGa8f238467 [2020-12-23 06:18:13,585 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/da2e110c6/60d30bb8803748059eb3c9a0f05f193e [2020-12-23 06:18:13,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:18:13,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:18:13,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:18:13,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:18:13,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:18:13,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:18:13" (1/1) ... [2020-12-23 06:18:13,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e9026d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:13, skipping insertion in model container [2020-12-23 06:18:13,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:18:13" (1/1) ... [2020-12-23 06:18:13,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:18:13,623 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pd~0,],base],StructAccessExpression[IdentifierExpression[~pd~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pd~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~pd~0,],offset]]]] [2020-12-23 06:18:13,786 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test28-2.c[576,589] [2020-12-23 06:18:13,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:18:13,803 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pd~0,],base],StructAccessExpression[IdentifierExpression[~pd~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pd~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~pd~0,],offset]]]] [2020-12-23 06:18:13,820 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test28-2.c[576,589] [2020-12-23 06:18:13,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:18:13,837 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:18:13,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:13 WrapperNode [2020-12-23 06:18:13,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:18:13,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:18:13,839 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:18:13,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:18:13,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:13" (1/1) ... [2020-12-23 06:18:13,856 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:13" (1/1) ... [2020-12-23 06:18:13,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:18:13,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:18:13,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:18:13,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:18:13,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:13" (1/1) ... [2020-12-23 06:18:13,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:13" (1/1) ... [2020-12-23 06:18:13,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:13" (1/1) ... [2020-12-23 06:18:13,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:13" (1/1) ... [2020-12-23 06:18:13,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:13" (1/1) ... [2020-12-23 06:18:13,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:13" (1/1) ... [2020-12-23 06:18:13,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:13" (1/1) ... [2020-12-23 06:18:13,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:18:13,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:18:13,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:18:13,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:18:13,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:18:14,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 06:18:14,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:18:14,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:18:14,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:18:14,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:18:14,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:18:14,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:18:14,292 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:18:14,293 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 06:18:14,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:18:14 BoogieIcfgContainer [2020-12-23 06:18:14,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:18:14,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:18:14,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:18:14,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:18:14,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:18:13" (1/3) ... [2020-12-23 06:18:14,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77b0bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:18:14, skipping insertion in model container [2020-12-23 06:18:14,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:18:13" (2/3) ... [2020-12-23 06:18:14,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77b0bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:18:14, skipping insertion in model container [2020-12-23 06:18:14,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:18:14" (3/3) ... [2020-12-23 06:18:14,304 INFO L111 eAbstractionObserver]: Analyzing ICFG test28-2.c [2020-12-23 06:18:14,311 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:18:14,317 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:18:14,339 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:18:14,369 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:18:14,370 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:18:14,370 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:18:14,370 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:18:14,370 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:18:14,370 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:18:14,371 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:18:14,371 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:18:14,388 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-23 06:18:14,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 06:18:14,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:14,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:14,405 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:14,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:14,421 INFO L82 PathProgramCache]: Analyzing trace with hash -594068692, now seen corresponding path program 1 times [2020-12-23 06:18:14,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:14,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787695438] [2020-12-23 06:18:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:14,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787695438] [2020-12-23 06:18:14,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:18:14,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 06:18:14,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645172403] [2020-12-23 06:18:14,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:18:14,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:14,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:18:14,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:18:14,764 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 7 states. [2020-12-23 06:18:14,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:14,902 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2020-12-23 06:18:14,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:18:14,905 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-23 06:18:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:14,914 INFO L225 Difference]: With dead ends: 25 [2020-12-23 06:18:14,914 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:18:14,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:18:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:18:14,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 06:18:14,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 06:18:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 9 transitions. [2020-12-23 06:18:14,952 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 9 transitions. Word has length 9 [2020-12-23 06:18:14,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:14,953 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 9 transitions. [2020-12-23 06:18:14,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:18:14,953 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 9 transitions. [2020-12-23 06:18:14,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 06:18:14,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:18:14,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:18:14,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:18:14,955 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:18:14,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:18:14,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1182785712, now seen corresponding path program 1 times [2020-12-23 06:18:14,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:18:14,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461290396] [2020-12-23 06:18:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:18:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:18:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:18:15,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461290396] [2020-12-23 06:18:15,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:18:15,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 06:18:15,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011021664] [2020-12-23 06:18:15,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:18:15,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:18:15,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:18:15,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:18:15,239 INFO L87 Difference]: Start difference. First operand 10 states and 9 transitions. Second operand 8 states. [2020-12-23 06:18:15,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:18:15,302 INFO L93 Difference]: Finished difference Result 10 states and 9 transitions. [2020-12-23 06:18:15,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:18:15,302 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-12-23 06:18:15,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:18:15,303 INFO L225 Difference]: With dead ends: 10 [2020-12-23 06:18:15,303 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 06:18:15,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:18:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 06:18:15,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 06:18:15,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 06:18:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 06:18:15,305 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2020-12-23 06:18:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:18:15,305 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 06:18:15,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:18:15,306 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 06:18:15,306 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 06:18:15,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:18:15,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 06:18:15,319 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 06:18:15,320 INFO L192 CegarLoopUtils]: At program point L29(lines 12 30) the Hoare annotation is: true [2020-12-23 06:18:15,320 INFO L185 CegarLoopUtils]: At program point L23(lines 13 30) the Hoare annotation is: false [2020-12-23 06:18:15,320 INFO L189 CegarLoopUtils]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-12-23 06:18:15,320 INFO L189 CegarLoopUtils]: For program point L17-2(lines 17 21) no Hoare annotation was computed. [2020-12-23 06:18:15,320 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 06:18:15,320 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 06:18:15,320 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 06:18:15,321 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 28) no Hoare annotation was computed. [2020-12-23 06:18:15,321 INFO L189 CegarLoopUtils]: For program point L22(line 22) no Hoare annotation was computed. [2020-12-23 06:18:15,321 INFO L189 CegarLoopUtils]: For program point L22-2(lines 22 24) no Hoare annotation was computed. [2020-12-23 06:18:15,321 INFO L189 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2020-12-23 06:18:15,321 INFO L189 CegarLoopUtils]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-12-23 06:18:15,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:18:15 BoogieIcfgContainer [2020-12-23 06:18:15,332 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:18:15,332 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:18:15,332 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:18:15,333 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:18:15,333 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:18:14" (3/4) ... [2020-12-23 06:18:15,337 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 06:18:15,347 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-23 06:18:15,348 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 06:18:15,348 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:18:15,348 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:18:15,393 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/test28-2.c-witness.graphml [2020-12-23 06:18:15,393 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:18:15,395 INFO L168 Benchmark]: Toolchain (without parser) took 1803.66 ms. Allocated memory is still 160.4 MB. Free memory was 135.9 MB in the beginning and 121.2 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.6 MB. Max. memory is 8.0 GB. [2020-12-23 06:18:15,395 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 160.4 MB. Free memory is still 133.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:18:15,396 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.24 ms. Allocated memory is still 160.4 MB. Free memory was 135.6 MB in the beginning and 126.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 06:18:15,397 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.94 ms. Allocated memory is still 160.4 MB. Free memory was 126.1 MB in the beginning and 125.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:18:15,397 INFO L168 Benchmark]: Boogie Preprocessor took 23.05 ms. Allocated memory is still 160.4 MB. Free memory was 125.0 MB in the beginning and 123.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:18:15,398 INFO L168 Benchmark]: RCFGBuilder took 394.86 ms. Allocated memory is still 160.4 MB. Free memory was 123.7 MB in the beginning and 110.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-12-23 06:18:15,399 INFO L168 Benchmark]: TraceAbstraction took 1035.01 ms. Allocated memory is still 160.4 MB. Free memory was 110.1 MB in the beginning and 123.8 MB in the end (delta: -13.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:18:15,399 INFO L168 Benchmark]: Witness Printer took 60.73 ms. Allocated memory is still 160.4 MB. Free memory was 123.8 MB in the beginning and 121.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:18:15,407 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 160.4 MB. Free memory is still 133.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 245.24 ms. Allocated memory is still 160.4 MB. Free memory was 135.6 MB in the beginning and 126.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.94 ms. Allocated memory is still 160.4 MB. Free memory was 126.1 MB in the beginning and 125.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.05 ms. Allocated memory is still 160.4 MB. Free memory was 125.0 MB in the beginning and 123.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 394.86 ms. Allocated memory is still 160.4 MB. Free memory was 123.7 MB in the beginning and 110.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1035.01 ms. Allocated memory is still 160.4 MB. Free memory was 110.1 MB in the beginning and 123.8 MB in the end (delta: -13.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 60.73 ms. Allocated memory is still 160.4 MB. Free memory was 123.8 MB in the beginning and 121.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 28]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 8 SDtfs, 28 SDslu, 21 SDs, 0 SdLazy, 65 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 2 LocationsWithAnnotation, 2 PreInvPairs, 3 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 624 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...