/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/test_cut_trace.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:12:47,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:12:47,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:12:47,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:12:47,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:12:47,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:12:47,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:12:47,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:12:47,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:12:47,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:12:47,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:12:47,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:12:47,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:12:47,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:12:47,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:12:47,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:12:47,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:12:47,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:12:47,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:12:47,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:12:47,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:12:47,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:12:47,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:12:47,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:12:47,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:12:47,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:12:47,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:12:47,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:12:47,266 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 16:12:47,320 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:12:47,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:12:47,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:12:47,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:12:47,326 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:12:47,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:12:47,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:12:47,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:12:47,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:12:47,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:12:47,328 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:12:47,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:12:47,329 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:12:47,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:12:47,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:12:47,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:12:47,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:12:47,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:12:47,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:12:47,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:12:47,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:12:47,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:12:47,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:12:47,331 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:12:47,331 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:12:47,332 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:12:47,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:12:47,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:12:47,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:12:47,815 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:12:47,816 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:12:47,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test_cut_trace.i [2021-01-06 16:12:47,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e47fcfcc0/1a848e7614e742a9aa328d55edc14d41/FLAGb076e85a2 [2021-01-06 16:12:48,618 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:12:48,618 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test_cut_trace.i [2021-01-06 16:12:48,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e47fcfcc0/1a848e7614e742a9aa328d55edc14d41/FLAGb076e85a2 [2021-01-06 16:12:48,983 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e47fcfcc0/1a848e7614e742a9aa328d55edc14d41 [2021-01-06 16:12:48,987 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:12:48,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:12:48,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:12:48,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:12:48,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:12:48,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:12:48" (1/1) ... [2021-01-06 16:12:48,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d6dcb7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:48, skipping insertion in model container [2021-01-06 16:12:48,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:12:48" (1/1) ... [2021-01-06 16:12:49,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:12:49,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:12:49,221 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/test_cut_trace.i[296,309] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] [2021-01-06 16:12:49,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:12:49,248 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:12:49,263 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/test_cut_trace.i[296,309] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] [2021-01-06 16:12:49,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:12:49,282 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:12:49,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:49 WrapperNode [2021-01-06 16:12:49,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:12:49,284 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:12:49,284 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:12:49,285 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:12:49,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:49" (1/1) ... [2021-01-06 16:12:49,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:49" (1/1) ... [2021-01-06 16:12:49,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:12:49,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:12:49,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:12:49,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:12:49,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:49" (1/1) ... [2021-01-06 16:12:49,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:49" (1/1) ... [2021-01-06 16:12:49,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:49" (1/1) ... [2021-01-06 16:12:49,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:49" (1/1) ... [2021-01-06 16:12:49,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:49" (1/1) ... [2021-01-06 16:12:49,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:49" (1/1) ... [2021-01-06 16:12:49,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:49" (1/1) ... [2021-01-06 16:12:49,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:12:49,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:12:49,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:12:49,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:12:49,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:49" (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 16:12:49,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:12:49,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:12:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:12:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:12:49,657 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:12:49,657 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 16:12:49,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:49 BoogieIcfgContainer [2021-01-06 16:12:49,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:12:49,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:12:49,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:12:49,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:12:49,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:12:48" (1/3) ... [2021-01-06 16:12:49,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ab37f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:12:49, skipping insertion in model container [2021-01-06 16:12:49,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:49" (2/3) ... [2021-01-06 16:12:49,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ab37f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:12:49, skipping insertion in model container [2021-01-06 16:12:49,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:49" (3/3) ... [2021-01-06 16:12:49,670 INFO L111 eAbstractionObserver]: Analyzing ICFG test_cut_trace.i [2021-01-06 16:12:49,678 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:12:49,683 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 16:12:49,706 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 16:12:49,740 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:12:49,740 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:12:49,741 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:12:49,741 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:12:49,746 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:12:49,746 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:12:49,747 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:12:49,747 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:12:49,786 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-01-06 16:12:49,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-01-06 16:12:49,807 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:49,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-01-06 16:12:49,809 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:49,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:49,820 INFO L82 PathProgramCache]: Analyzing trace with hash 925669, now seen corresponding path program 1 times [2021-01-06 16:12:49,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:49,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946356231] [2021-01-06 16:12:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:50,116 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 16:12:50,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946356231] [2021-01-06 16:12:50,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:50,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:12:50,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995404190] [2021-01-06 16:12:50,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:12:50,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:50,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:12:50,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:12:50,155 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2021-01-06 16:12:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:50,191 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-01-06 16:12:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:12:50,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2021-01-06 16:12:50,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:50,204 INFO L225 Difference]: With dead ends: 21 [2021-01-06 16:12:50,204 INFO L226 Difference]: Without dead ends: 7 [2021-01-06 16:12:50,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:12:50,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-01-06 16:12:50,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-01-06 16:12:50,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-01-06 16:12:50,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-01-06 16:12:50,247 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 4 [2021-01-06 16:12:50,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:50,247 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-01-06 16:12:50,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:12:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-01-06 16:12:50,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:12:50,248 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:50,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:12:50,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:12:50,249 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:50,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:50,250 INFO L82 PathProgramCache]: Analyzing trace with hash 889512749, now seen corresponding path program 1 times [2021-01-06 16:12:50,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:50,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833299345] [2021-01-06 16:12:50,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:50,313 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 16:12:50,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833299345] [2021-01-06 16:12:50,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:50,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:12:50,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949719467] [2021-01-06 16:12:50,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:12:50,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:50,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:12:50,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:12:50,318 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand 4 states. [2021-01-06 16:12:50,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:50,346 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2021-01-06 16:12:50,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:12:50,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-06 16:12:50,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:50,347 INFO L225 Difference]: With dead ends: 7 [2021-01-06 16:12:50,347 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 16:12:50,348 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 16:12:50,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 16:12:50,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 16:12:50,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 16:12:50,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 16:12:50,350 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2021-01-06 16:12:50,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:50,350 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 16:12:50,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:12:50,350 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 16:12:50,351 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 16:12:50,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:12:50,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 16:12:50,368 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 16:12:50,368 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-01-06 16:12:50,368 INFO L185 CegarLoopUtils]: At program point L21(lines 15 22) the Hoare annotation is: (= ULTIMATE.start_main_~z~0 0) [2021-01-06 16:12:50,369 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 16:12:50,369 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 16:12:50,369 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 16:12:50,369 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-01-06 16:12:50,369 INFO L189 CegarLoopUtils]: For program point L20(line 20) no Hoare annotation was computed. [2021-01-06 16:12:50,369 INFO L189 CegarLoopUtils]: For program point L18(line 18) no Hoare annotation was computed. [2021-01-06 16:12:50,370 INFO L189 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-01-06 16:12:50,370 INFO L189 CegarLoopUtils]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-01-06 16:12:50,370 INFO L189 CegarLoopUtils]: For program point L6(lines 1 22) no Hoare annotation was computed. [2021-01-06 16:12:50,370 INFO L189 CegarLoopUtils]: For program point L6-1(lines 1 22) no Hoare annotation was computed. [2021-01-06 16:12:50,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:12:50 BoogieIcfgContainer [2021-01-06 16:12:50,387 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:12:50,388 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:12:50,388 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:12:50,389 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:12:50,389 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:49" (3/4) ... [2021-01-06 16:12:50,393 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 16:12:50,407 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-01-06 16:12:50,407 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 16:12:50,408 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:12:50,408 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:12:50,449 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/test_cut_trace.i-witness.graphml [2021-01-06 16:12:50,449 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:12:50,452 INFO L168 Benchmark]: Toolchain (without parser) took 1461.11 ms. Allocated memory is still 155.2 MB. Free memory was 131.0 MB in the beginning and 115.9 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:50,453 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 155.2 MB. Free memory was 126.9 MB in the beginning and 126.8 MB in the end (delta: 77.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:12:50,454 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.72 ms. Allocated memory is still 155.2 MB. Free memory was 130.7 MB in the beginning and 121.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:50,455 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.20 ms. Allocated memory is still 155.2 MB. Free memory was 121.5 MB in the beginning and 120.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:50,456 INFO L168 Benchmark]: Boogie Preprocessor took 20.93 ms. Allocated memory is still 155.2 MB. Free memory was 120.2 MB in the beginning and 119.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:50,456 INFO L168 Benchmark]: RCFGBuilder took 317.14 ms. Allocated memory is still 155.2 MB. Free memory was 119.2 MB in the beginning and 108.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:50,457 INFO L168 Benchmark]: TraceAbstraction took 726.65 ms. Allocated memory is still 155.2 MB. Free memory was 108.3 MB in the beginning and 118.0 MB in the end (delta: -9.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:12:50,458 INFO L168 Benchmark]: Witness Printer took 60.71 ms. Allocated memory is still 155.2 MB. Free memory was 118.0 MB in the beginning and 115.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:50,463 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 155.2 MB. Free memory was 126.9 MB in the beginning and 126.8 MB in the end (delta: 77.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 291.72 ms. Allocated memory is still 155.2 MB. Free memory was 130.7 MB in the beginning and 121.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.20 ms. Allocated memory is still 155.2 MB. Free memory was 121.5 MB in the beginning and 120.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.93 ms. Allocated memory is still 155.2 MB. Free memory was 120.2 MB in the beginning and 119.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 317.14 ms. Allocated memory is still 155.2 MB. Free memory was 119.2 MB in the beginning and 108.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 726.65 ms. Allocated memory is still 155.2 MB. Free memory was 108.3 MB in the beginning and 118.0 MB in the end (delta: -9.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 60.71 ms. Allocated memory is still 155.2 MB. Free memory was 118.0 MB in the beginning and 115.9 MB in the end (delta: 2.1 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: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 8]: 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 2 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: z == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 9 SDslu, 3 SDs, 0 SdLazy, 6 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s 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, 1 LocationsWithAnnotation, 1 PreInvPairs, 2 NumberOfFragments, 3 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 70 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...