/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/nla-digbench-scaling/freire1_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:19:32,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:19:32,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:19:32,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:19:32,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:19:32,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:19:32,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:19:32,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:19:32,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:19:32,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:19:32,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:19:32,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:19:32,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:19:32,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:19:32,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:19:32,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:19:32,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:19:32,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:19:32,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:19:32,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:19:32,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:19:32,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:19:32,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:19:32,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:19:32,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:19:32,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:19:32,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:19:32,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:19:32,229 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:19:32,283 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:19:32,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:19:32,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:19:32,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:19:32,289 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:19:32,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:19:32,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:19:32,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:19:32,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:19:32,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:19:32,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:19:32,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:19:32,292 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:19:32,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:19:32,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:19:32,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:19:32,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:19:32,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:19:32,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:19:32,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:19:32,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:19:32,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:19:32,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:19:32,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:19:32,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:19:32,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:19:32,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:19:32,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:19:32,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:19:32,792 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:19:32,793 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:19:32,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire1_valuebound20.c [2020-12-22 05:19:32,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e89ea14d5/b91a85db2a864285a7254433c09522a9/FLAGa6d027b01 [2020-12-22 05:19:33,660 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:19:33,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire1_valuebound20.c [2020-12-22 05:19:33,671 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e89ea14d5/b91a85db2a864285a7254433c09522a9/FLAGa6d027b01 [2020-12-22 05:19:33,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e89ea14d5/b91a85db2a864285a7254433c09522a9 [2020-12-22 05:19:34,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:19:34,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:19:34,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:19:34,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:19:34,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:19:34,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:19:34" (1/1) ... [2020-12-22 05:19:34,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6518f29a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:34, skipping insertion in model container [2020-12-22 05:19:34,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:19:34" (1/1) ... [2020-12-22 05:19:34,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:19:34,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:19:34,205 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire1_valuebound20.c[712,725] [2020-12-22 05:19:34,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:19:34,237 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:19:34,252 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire1_valuebound20.c[712,725] [2020-12-22 05:19:34,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:19:34,275 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:19:34,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:34 WrapperNode [2020-12-22 05:19:34,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:19:34,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:19:34,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:19:34,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:19:34,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:34" (1/1) ... [2020-12-22 05:19:34,298 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:34" (1/1) ... [2020-12-22 05:19:34,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:19:34,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:19:34,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:19:34,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:19:34,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:34" (1/1) ... [2020-12-22 05:19:34,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:34" (1/1) ... [2020-12-22 05:19:34,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:34" (1/1) ... [2020-12-22 05:19:34,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:34" (1/1) ... [2020-12-22 05:19:34,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:34" (1/1) ... [2020-12-22 05:19:34,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:34" (1/1) ... [2020-12-22 05:19:34,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:34" (1/1) ... [2020-12-22 05:19:34,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:19:34,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:19:34,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:19:34,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:19:34,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:19:34,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:19:34,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:19:34,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:19:34,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:19:34,657 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:19:34,657 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 05:19:34,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:19:34 BoogieIcfgContainer [2020-12-22 05:19:34,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:19:34,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:19:34,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:19:34,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:19:34,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:19:34" (1/3) ... [2020-12-22 05:19:34,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f751e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:19:34, skipping insertion in model container [2020-12-22 05:19:34,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:34" (2/3) ... [2020-12-22 05:19:34,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f751e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:19:34, skipping insertion in model container [2020-12-22 05:19:34,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:19:34" (3/3) ... [2020-12-22 05:19:34,669 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1_valuebound20.c [2020-12-22 05:19:34,676 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:19:34,681 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 05:19:34,703 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 05:19:34,747 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:19:34,747 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:19:34,747 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:19:34,747 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:19:34,747 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:19:34,748 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:19:34,748 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:19:34,748 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:19:34,763 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-22 05:19:34,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 05:19:34,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:19:34,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:19:34,790 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:19:34,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:19:34,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2020-12-22 05:19:34,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:19:34,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988602020] [2020-12-22 05:19:34,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:19:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:19:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:19:35,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988602020] [2020-12-22 05:19:35,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:19:35,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:19:35,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78566125] [2020-12-22 05:19:35,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:19:35,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:19:35,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:19:35,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:19:35,048 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-22 05:19:35,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:19:35,067 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2020-12-22 05:19:35,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:19:35,069 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-22 05:19:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:19:35,078 INFO L225 Difference]: With dead ends: 31 [2020-12-22 05:19:35,079 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 05:19:35,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:19:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 05:19:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 05:19:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 05:19:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-22 05:19:35,120 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2020-12-22 05:19:35,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:19:35,121 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-22 05:19:35,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:19:35,121 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-22 05:19:35,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 05:19:35,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:19:35,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:19:35,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:19:35,122 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:19:35,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:19:35,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2020-12-22 05:19:35,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:19:35,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646545417] [2020-12-22 05:19:35,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:19:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 05:19:35,177 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:19:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 05:19:35,222 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:19:35,245 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 05:19:35,246 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:19:35,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 05:19:35,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:19:35 BoogieIcfgContainer [2020-12-22 05:19:35,273 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:19:35,274 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:19:35,274 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:19:35,274 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:19:35,275 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:19:34" (3/4) ... [2020-12-22 05:19:35,279 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 05:19:35,279 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:19:35,282 INFO L168 Benchmark]: Toolchain (without parser) took 1275.22 ms. Allocated memory is still 153.1 MB. Free memory was 127.4 MB in the beginning and 116.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. [2020-12-22 05:19:35,283 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 153.1 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:19:35,284 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.14 ms. Allocated memory is still 153.1 MB. Free memory was 127.2 MB in the beginning and 117.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 05:19:35,285 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.34 ms. Allocated memory is still 153.1 MB. Free memory was 117.3 MB in the beginning and 115.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:19:35,286 INFO L168 Benchmark]: Boogie Preprocessor took 26.22 ms. Allocated memory is still 153.1 MB. Free memory was 115.9 MB in the beginning and 114.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:19:35,287 INFO L168 Benchmark]: RCFGBuilder took 311.78 ms. Allocated memory is still 153.1 MB. Free memory was 114.8 MB in the beginning and 102.8 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-22 05:19:35,287 INFO L168 Benchmark]: TraceAbstraction took 611.65 ms. Allocated memory is still 153.1 MB. Free memory was 102.4 MB in the beginning and 116.9 MB in the end (delta: -14.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:19:35,288 INFO L168 Benchmark]: Witness Printer took 5.33 ms. Allocated memory is still 153.1 MB. Free memory is still 116.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:19:35,292 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 153.1 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 265.14 ms. Allocated memory is still 153.1 MB. Free memory was 127.2 MB in the beginning and 117.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 43.34 ms. Allocated memory is still 153.1 MB. Free memory was 117.3 MB in the beginning and 115.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.22 ms. Allocated memory is still 153.1 MB. Free memory was 115.9 MB in the beginning and 114.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 311.78 ms. Allocated memory is still 153.1 MB. Free memory was 114.8 MB in the beginning and 102.8 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 611.65 ms. Allocated memory is still 153.1 MB. Free memory was 102.4 MB in the beginning and 116.9 MB in the end (delta: -14.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 5.33 ms. Allocated memory is still 153.1 MB. Free memory is still 116.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 33, overapproximation of someBinaryDOUBLEComparisonOperation at line 28, overapproximation of someBinaryArithmeticDOUBLEoperation at line 29. Possible FailurePath: [L25] int r; [L26] double a, x; [L27] a = __VERIFIER_nondet_double() [L14] COND FALSE !(!cond) [L29] x = a / 2.0 [L30] r = 0 [L32] COND TRUE 1 [L17] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 36 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...