/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/fermat1-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:18:57,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:18:57,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:18:57,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:18:57,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:18:57,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:18:57,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:18:57,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:18:57,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:18:57,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:18:57,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:18:57,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:18:57,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:18:57,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:18:57,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:18:57,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:18:57,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:18:57,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:18:57,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:18:57,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:18:57,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:18:57,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:18:57,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:18:57,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:18:57,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:18:57,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 05:18:57,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 05:18:57,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 05:18:57,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 05:18:57,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 05:18:57,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 05:18:57,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 05:18:57,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 05:18:57,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:18:57,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:18:57,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:18:57,331 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:18:57,360 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:18:57,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:18:57,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:18:57,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:18:57,363 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:18:57,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:18:57,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:18:57,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:18:57,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:18:57,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:18:57,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:18:57,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:18:57,365 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:18:57,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:18:57,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:18:57,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:18:57,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:18:57,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:18:57,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:18:57,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:18:57,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:18:57,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:18:57,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:18:57,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:18:57,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:18:57,369 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:18:57,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:18:57,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:18:57,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:18:57,840 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:18:57,841 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:18:57,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_valuebound50.c [2020-12-22 05:18:57,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f88590cf/fd8d5615bfbc47449764b8e62b6c6f47/FLAG92f0cbcb9 [2020-12-22 05:18:58,648 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:18:58,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_valuebound50.c [2020-12-22 05:18:58,656 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f88590cf/fd8d5615bfbc47449764b8e62b6c6f47/FLAG92f0cbcb9 [2020-12-22 05:18:59,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f88590cf/fd8d5615bfbc47449764b8e62b6c6f47 [2020-12-22 05:18:59,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:18:59,034 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:18:59,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:18:59,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:18:59,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:18:59,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:18:59" (1/1) ... [2020-12-22 05:18:59,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b5526fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:18:59, skipping insertion in model container [2020-12-22 05:18:59,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:18:59" (1/1) ... [2020-12-22 05:18:59,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:18:59,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:18:59,239 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/fermat1-ll_valuebound50.c[535,548] [2020-12-22 05:18:59,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:18:59,280 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:18:59,302 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/fermat1-ll_valuebound50.c[535,548] [2020-12-22 05:18:59,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:18:59,359 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:18:59,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:18:59 WrapperNode [2020-12-22 05:18:59,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:18:59,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:18:59,366 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:18:59,366 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:18:59,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:18:59" (1/1) ... [2020-12-22 05:18:59,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:18:59" (1/1) ... [2020-12-22 05:18:59,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:18:59,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:18:59,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:18:59,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:18:59,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:18:59" (1/1) ... [2020-12-22 05:18:59,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:18:59" (1/1) ... [2020-12-22 05:18:59,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:18:59" (1/1) ... [2020-12-22 05:18:59,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:18:59" (1/1) ... [2020-12-22 05:18:59,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:18:59" (1/1) ... [2020-12-22 05:18:59,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:18:59" (1/1) ... [2020-12-22 05:18:59,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:18:59" (1/1) ... [2020-12-22 05:18:59,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:18:59,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:18:59,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:18:59,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:18:59,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:18:59" (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 05:18:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:18:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:18:59,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:18:59,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:19:00,089 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:19:00,090 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 05:19:00,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:19:00 BoogieIcfgContainer [2020-12-22 05:19:00,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:19:00,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:19:00,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:19:00,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:19:00,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:18:59" (1/3) ... [2020-12-22 05:19:00,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d1968f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:19:00, skipping insertion in model container [2020-12-22 05:19:00,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:18:59" (2/3) ... [2020-12-22 05:19:00,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d1968f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:19:00, skipping insertion in model container [2020-12-22 05:19:00,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:19:00" (3/3) ... [2020-12-22 05:19:00,104 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_valuebound50.c [2020-12-22 05:19:00,114 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:19:00,120 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-22 05:19:00,150 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-22 05:19:00,220 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:19:00,221 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:19:00,221 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:19:00,221 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:19:00,221 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:19:00,221 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:19:00,222 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:19:00,222 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:19:00,258 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-22 05:19:00,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 05:19:00,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:19:00,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:19:00,267 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:19:00,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:19:00,276 INFO L82 PathProgramCache]: Analyzing trace with hash -144177098, now seen corresponding path program 1 times [2020-12-22 05:19:00,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:19:00,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818908119] [2020-12-22 05:19:00,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:19:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:19:00,505 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 05:19:00,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818908119] [2020-12-22 05:19:00,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:19:00,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:19:00,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219213051] [2020-12-22 05:19:00,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:19:00,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:19:00,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:19:00,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:19:00,544 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-12-22 05:19:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:19:00,584 INFO L93 Difference]: Finished difference Result 63 states and 94 transitions. [2020-12-22 05:19:00,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:19:00,586 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-12-22 05:19:00,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:19:00,603 INFO L225 Difference]: With dead ends: 63 [2020-12-22 05:19:00,604 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 05:19:00,609 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 05:19:00,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 05:19:00,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-22 05:19:00,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 05:19:00,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-22 05:19:00,657 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 13 [2020-12-22 05:19:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:19:00,658 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-22 05:19:00,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:19:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-22 05:19:00,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 05:19:00,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:19:00,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:19:00,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:19:00,661 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:19:00,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:19:00,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1281167042, now seen corresponding path program 1 times [2020-12-22 05:19:00,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:19:00,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703832210] [2020-12-22 05:19:00,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:19:00,709 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:19:00,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729132098] [2020-12-22 05:19:00,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:19:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:19:00,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:19:00,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:19:01,049 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 05:19:01,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703832210] [2020-12-22 05:19:01,050 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:19:01,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729132098] [2020-12-22 05:19:01,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:19:01,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:19:01,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060371003] [2020-12-22 05:19:01,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:19:01,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:19:01,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:19:01,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:19:01,054 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 6 states. [2020-12-22 05:19:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:19:03,216 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-22 05:19:03,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:19:03,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-22 05:19:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:19:03,218 INFO L225 Difference]: With dead ends: 39 [2020-12-22 05:19:03,218 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 05:19:03,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:19:03,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 05:19:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-12-22 05:19:03,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 05:19:03,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-22 05:19:03,226 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 13 [2020-12-22 05:19:03,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:19:03,226 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-22 05:19:03,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:19:03,227 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-22 05:19:03,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:19:03,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:19:03,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:19:03,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:19:03,443 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:19:03,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:19:03,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2131977584, now seen corresponding path program 1 times [2020-12-22 05:19:03,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:19:03,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426550241] [2020-12-22 05:19:03,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:19:03,460 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:19:03,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443532550] [2020-12-22 05:19:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:19:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:19:03,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 05:19:03,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:19:03,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426550241] [2020-12-22 05:19:03,649 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:19:03,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443532550] [2020-12-22 05:19:03,649 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-22 05:19:03,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:19:03,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-22 05:19:03,650 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-22 05:19:03,650 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:19:03,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:19:03,887 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-22 05:19:03,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:19:03 BoogieIcfgContainer [2020-12-22 05:19:03,888 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:19:03,889 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:19:03,889 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:19:03,889 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:19:03,890 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:19:00" (3/4) ... [2020-12-22 05:19:03,893 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 05:19:03,893 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:19:03,896 INFO L168 Benchmark]: Toolchain (without parser) took 4862.36 ms. Allocated memory is still 166.7 MB. Free memory was 141.2 MB in the beginning and 97.0 MB in the end (delta: 44.2 MB). Peak memory consumption was 45.3 MB. Max. memory is 8.0 GB. [2020-12-22 05:19:03,896 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 166.7 MB. Free memory is still 148.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:19:03,897 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.57 ms. Allocated memory is still 166.7 MB. Free memory was 141.0 MB in the beginning and 130.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 05:19:03,898 INFO L168 Benchmark]: Boogie Procedure Inliner took 72.43 ms. Allocated memory is still 166.7 MB. Free memory was 130.4 MB in the beginning and 128.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:19:03,899 INFO L168 Benchmark]: Boogie Preprocessor took 26.68 ms. Allocated memory is still 166.7 MB. Free memory was 128.9 MB in the beginning and 127.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:19:03,900 INFO L168 Benchmark]: RCFGBuilder took 626.38 ms. Allocated memory is still 166.7 MB. Free memory was 127.5 MB in the beginning and 138.9 MB in the end (delta: -11.4 MB). Peak memory consumption was 10.3 MB. Max. memory is 8.0 GB. [2020-12-22 05:19:03,900 INFO L168 Benchmark]: TraceAbstraction took 3793.03 ms. Allocated memory is still 166.7 MB. Free memory was 138.3 MB in the beginning and 97.5 MB in the end (delta: 40.8 MB). Peak memory consumption was 41.2 MB. Max. memory is 8.0 GB. [2020-12-22 05:19:03,901 INFO L168 Benchmark]: Witness Printer took 4.86 ms. Allocated memory is still 166.7 MB. Free memory is still 97.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:19:03,905 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 166.7 MB. Free memory is still 148.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 323.57 ms. Allocated memory is still 166.7 MB. Free memory was 141.0 MB in the beginning and 130.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 72.43 ms. Allocated memory is still 166.7 MB. Free memory was 130.4 MB in the beginning and 128.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.68 ms. Allocated memory is still 166.7 MB. Free memory was 128.9 MB in the beginning and 127.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 626.38 ms. Allocated memory is still 166.7 MB. Free memory was 127.5 MB in the beginning and 138.9 MB in the end (delta: -11.4 MB). Peak memory consumption was 10.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3793.03 ms. Allocated memory is still 166.7 MB. Free memory was 138.3 MB in the beginning and 97.5 MB in the end (delta: 40.8 MB). Peak memory consumption was 41.2 MB. Max. memory is 8.0 GB. * Witness Printer took 4.86 ms. Allocated memory is still 166.7 MB. Free memory is still 97.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] int A, R; [L21] long long u, v, r; [L22] A = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L24] R = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L9] COND FALSE !(!cond) [L9] COND FALSE !(!cond) [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A [L35] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L37] COND TRUE !(r != 0) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 3.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 56 SDtfs, 17 SDslu, 53 SDs, 0 SdLazy, 43 SolverSat, 2 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 6 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 1488 SizeOfPredicates, 8 NumberOfNonLiveVariables, 72 ConjunctsInSsa, 19 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...