/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/test07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:12:09,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:12:09,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:12:09,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:12:09,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:12:09,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:12:09,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:12:09,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:12:09,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:12:09,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:12:09,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:12:09,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:12:09,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:12:09,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:12:09,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:12:09,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:12:09,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:12:09,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:12:09,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:12:09,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:12:09,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:12:09,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:12:09,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:12:09,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:12:09,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:12:09,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:12:09,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:12:09,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:12:09,200 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:12:09,255 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:12:09,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:12:09,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:12:09,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:12:09,260 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:12:09,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:12:09,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:12:09,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:12:09,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:12:09,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:12:09,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:12:09,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:12:09,263 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:12:09,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:12:09,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:12:09,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:12:09,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:12:09,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:12:09,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:12:09,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:12:09,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:12:09,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:12:09,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:12:09,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:12:09,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:12:09,266 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:12:09,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:12:09,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:12:09,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:12:09,698 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:12:09,699 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:12:09,700 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test07.c [2021-01-06 16:12:09,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c5cee60b1/a59ebb297abc45d2a0337d218d8e6ef8/FLAG008579221 [2021-01-06 16:12:10,374 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:12:10,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test07.c [2021-01-06 16:12:10,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c5cee60b1/a59ebb297abc45d2a0337d218d8e6ef8/FLAG008579221 [2021-01-06 16:12:10,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c5cee60b1/a59ebb297abc45d2a0337d218d8e6ef8 [2021-01-06 16:12:10,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:12:10,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:12:10,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:12:10,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:12:10,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:12:10,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:12:10" (1/1) ... [2021-01-06 16:12:10,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aad4fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:10, skipping insertion in model container [2021-01-06 16:12:10,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:12:10" (1/1) ... [2021-01-06 16:12:10,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:12:10,806 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~p1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~b~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] [2021-01-06 16:12:11,049 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/test07.c[578,591] [2021-01-06 16:12:11,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:12:11,075 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~p1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2~0,GLOBAL] left hand side expression in assignment: address: IdentifierExpression[~#b~0,GLOBAL] left hand side expression in assignment: address: IdentifierExpression[~#a~0,GLOBAL] left hand side expression in assignment: address: IdentifierExpression[~#a~0,GLOBAL] [2021-01-06 16:12:11,098 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/test07.c[578,591] [2021-01-06 16:12:11,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:12:11,117 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:12:11,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:11 WrapperNode [2021-01-06 16:12:11,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:12:11,119 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:12:11,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:12:11,120 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:12:11,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:11" (1/1) ... [2021-01-06 16:12:11,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:11" (1/1) ... [2021-01-06 16:12:11,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:12:11,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:12:11,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:12:11,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:12:11,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:11" (1/1) ... [2021-01-06 16:12:11,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:11" (1/1) ... [2021-01-06 16:12:11,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:11" (1/1) ... [2021-01-06 16:12:11,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:11" (1/1) ... [2021-01-06 16:12:11,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:11" (1/1) ... [2021-01-06 16:12:11,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:11" (1/1) ... [2021-01-06 16:12:11,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:11" (1/1) ... [2021-01-06 16:12:11,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:12:11,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:12:11,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:12:11,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:12:11,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:11" (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 [2021-01-06 16:12:11,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:12:11,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:12:11,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:12:11,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:12:11,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:12:11,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:12:11,593 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:12:11,593 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-01-06 16:12:11,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:11 BoogieIcfgContainer [2021-01-06 16:12:11,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:12:11,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:12:11,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:12:11,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:12:11,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:12:10" (1/3) ... [2021-01-06 16:12:11,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ab067f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:12:11, skipping insertion in model container [2021-01-06 16:12:11,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:11" (2/3) ... [2021-01-06 16:12:11,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ab067f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:12:11, skipping insertion in model container [2021-01-06 16:12:11,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:11" (3/3) ... [2021-01-06 16:12:11,622 INFO L111 eAbstractionObserver]: Analyzing ICFG test07.c [2021-01-06 16:12:11,634 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:12:11,640 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:12:11,706 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:12:11,742 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:12:11,742 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:12:11,743 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:12:11,743 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:12:11,743 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:12:11,743 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:12:11,743 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:12:11,744 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:12:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2021-01-06 16:12:11,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:12:11,768 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:11,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:12:11,769 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:11,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:11,777 INFO L82 PathProgramCache]: Analyzing trace with hash 889508715, now seen corresponding path program 1 times [2021-01-06 16:12:11,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:11,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730392955] [2021-01-06 16:12:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:12,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:12,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730392955] [2021-01-06 16:12:12,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:12,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:12:12,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931062448] [2021-01-06 16:12:12,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:12:12,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:12,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:12:12,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:12:12,203 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 4 states. [2021-01-06 16:12:12,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:12,287 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-01-06 16:12:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:12:12,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-06 16:12:12,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:12,299 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:12:12,300 INFO L226 Difference]: Without dead ends: 7 [2021-01-06 16:12:12,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:12:12,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-01-06 16:12:12,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-01-06 16:12:12,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-01-06 16:12:12,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-01-06 16:12:12,344 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-01-06 16:12:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:12,344 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-01-06 16:12:12,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:12:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-01-06 16:12:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:12:12,345 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:12,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:12:12,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:12:12,346 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:12,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:12,347 INFO L82 PathProgramCache]: Analyzing trace with hash 889568297, now seen corresponding path program 1 times [2021-01-06 16:12:12,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:12,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506619410] [2021-01-06 16:12:12,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:12,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506619410] [2021-01-06 16:12:12,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:12,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:12:12,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502192883] [2021-01-06 16:12:12,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:12:12,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:12,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:12:12,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:12:12,559 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand 4 states. [2021-01-06 16:12:12,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:12,599 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2021-01-06 16:12:12,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:12:12,600 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-06 16:12:12,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:12,600 INFO L225 Difference]: With dead ends: 7 [2021-01-06 16:12:12,600 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 16:12:12,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:12:12,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 16:12:12,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 16:12:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 16:12:12,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 16:12:12,602 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2021-01-06 16:12:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:12,603 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 16:12:12,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:12:12,603 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 16:12:12,603 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 16:12:12,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:12:12,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 16:12:12,633 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 16:12:12,633 INFO L185 CegarLoopUtils]: At program point L32(lines 19 39) the Hoare annotation is: false [2021-01-06 16:12:12,634 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 16:12:12,634 INFO L189 CegarLoopUtils]: For program point L31(lines 31 33) no Hoare annotation was computed. [2021-01-06 16:12:12,634 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 16:12:12,634 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 16:12:12,634 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 37) no Hoare annotation was computed. [2021-01-06 16:12:12,634 INFO L185 CegarLoopUtils]: At program point L15(lines 9 17) the Hoare annotation is: (and (= ~p2~0.base ~p1~0.base) (= ~p2~0.offset ~p1~0.offset) (not (= |ULTIMATE.start_f_#res| 0))) [2021-01-06 16:12:12,635 INFO L189 CegarLoopUtils]: For program point L11(lines 11 16) no Hoare annotation was computed. [2021-01-06 16:12:12,635 INFO L192 CegarLoopUtils]: At program point L38(lines 19 39) the Hoare annotation is: true [2021-01-06 16:12:12,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:12:12 BoogieIcfgContainer [2021-01-06 16:12:12,652 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:12:12,654 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:12:12,654 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:12:12,654 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:12:12,655 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:11" (3/4) ... [2021-01-06 16:12:12,659 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 16:12:12,671 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-01-06 16:12:12,671 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 16:12:12,672 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:12:12,672 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:12:12,706 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (p2 == p1 && p2 == p1) && !(\result == 0) [2021-01-06 16:12:12,726 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/test07.c-witness.graphml [2021-01-06 16:12:12,726 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:12:12,728 INFO L168 Benchmark]: Toolchain (without parser) took 1977.37 ms. Allocated memory is still 163.6 MB. Free memory was 138.4 MB in the beginning and 100.3 MB in the end (delta: 38.1 MB). Peak memory consumption was 38.8 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:12,729 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 163.6 MB. Free memory is still 136.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:12:12,730 INFO L168 Benchmark]: CACSL2BoogieTranslator took 365.10 ms. Allocated memory is still 163.6 MB. Free memory was 138.2 MB in the beginning and 128.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:12,730 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.18 ms. Allocated memory is still 163.6 MB. Free memory was 128.7 MB in the beginning and 127.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:12,731 INFO L168 Benchmark]: Boogie Preprocessor took 26.02 ms. Allocated memory is still 163.6 MB. Free memory was 127.4 MB in the beginning and 126.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:12,732 INFO L168 Benchmark]: RCFGBuilder took 412.42 ms. Allocated memory is still 163.6 MB. Free memory was 126.4 MB in the beginning and 113.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:12,733 INFO L168 Benchmark]: TraceAbstraction took 1048.99 ms. Allocated memory is still 163.6 MB. Free memory was 112.7 MB in the beginning and 102.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:12,733 INFO L168 Benchmark]: Witness Printer took 72.77 ms. Allocated memory is still 163.6 MB. Free memory was 102.9 MB in the beginning and 100.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:12,737 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 163.6 MB. Free memory is still 136.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 365.10 ms. Allocated memory is still 163.6 MB. Free memory was 138.2 MB in the beginning and 128.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 39.18 ms. Allocated memory is still 163.6 MB. Free memory was 128.7 MB in the beginning and 127.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.02 ms. Allocated memory is still 163.6 MB. Free memory was 127.4 MB in the beginning and 126.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 412.42 ms. Allocated memory is still 163.6 MB. Free memory was 126.4 MB in the beginning and 113.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1048.99 ms. Allocated memory is still 163.6 MB. Free memory was 112.7 MB in the beginning and 102.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Witness Printer took 72.77 ms. Allocated memory is still 163.6 MB. Free memory was 102.9 MB in the beginning and 100.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 37]: 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: 9]: Loop Invariant Derived loop invariant: (p2 == p1 && p2 == p1) && !(\result == 0) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 4 SDslu, 7 SDs, 0 SdLazy, 16 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred 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, 3 LocationsWithAnnotation, 3 PreInvPairs, 6 NumberOfFragments, 13 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 365 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...