/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/fermat2-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:19:08,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:19:08,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:19:08,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:19:08,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:19:08,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:19:08,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:19:08,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:19:08,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:19:08,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:19:08,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:19:08,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:19:08,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:19:08,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:19:08,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:19:08,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:19:08,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:19:08,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:19:08,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:19:08,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:19:08,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:19:08,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:19:08,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:19:08,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:19:08,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:19:08,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:19:08,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:19:08,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:19:08,964 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:19:09,011 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:19:09,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:19:09,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:19:09,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:19:09,017 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:19:09,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:19:09,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:19:09,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:19:09,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:19:09,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:19:09,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:19:09,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:19:09,019 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:19:09,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:19:09,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:19:09,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:19:09,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:19:09,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:19:09,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:19:09,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:19:09,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:19:09,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:19:09,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:19:09,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:19:09,021 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:19:09,021 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:19:09,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:19:09,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:19:09,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:19:09,461 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:19:09,461 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:19:09,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_valuebound10.c [2020-12-22 05:19:09,544 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26fbed4d1/f8524f7b048a493388431ee65fc6fd4f/FLAGab5106c08 [2020-12-22 05:19:10,230 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:19:10,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_valuebound10.c [2020-12-22 05:19:10,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26fbed4d1/f8524f7b048a493388431ee65fc6fd4f/FLAGab5106c08 [2020-12-22 05:19:10,581 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26fbed4d1/f8524f7b048a493388431ee65fc6fd4f [2020-12-22 05:19:10,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:19:10,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:19:10,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:19:10,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:19:10,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:19:10,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:19:10" (1/1) ... [2020-12-22 05:19:10,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63e8ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:10, skipping insertion in model container [2020-12-22 05:19:10,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:19:10" (1/1) ... [2020-12-22 05:19:10,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:19:10,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:19:10,772 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/fermat2-ll_valuebound10.c[524,537] [2020-12-22 05:19:10,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:19:10,799 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:19:10,813 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/fermat2-ll_valuebound10.c[524,537] [2020-12-22 05:19:10,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:19:10,838 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:19:10,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:10 WrapperNode [2020-12-22 05:19:10,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:19:10,840 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:19:10,840 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:19:10,840 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:19:10,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:10" (1/1) ... [2020-12-22 05:19:10,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:10" (1/1) ... [2020-12-22 05:19:10,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:19:10,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:19:10,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:19:10,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:19:10,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:10" (1/1) ... [2020-12-22 05:19:10,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:10" (1/1) ... [2020-12-22 05:19:10,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:10" (1/1) ... [2020-12-22 05:19:10,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:10" (1/1) ... [2020-12-22 05:19:10,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:10" (1/1) ... [2020-12-22 05:19:10,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:10" (1/1) ... [2020-12-22 05:19:10,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:10" (1/1) ... [2020-12-22 05:19:10,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:19:10,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:19:10,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:19:10,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:19:10,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:10" (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 05:19:11,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:19:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:19:11,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:19:11,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:19:11,262 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:19:11,262 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-22 05:19:11,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:19:11 BoogieIcfgContainer [2020-12-22 05:19:11,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:19:11,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:19:11,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:19:11,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:19:11,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:19:10" (1/3) ... [2020-12-22 05:19:11,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d47f1db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:19:11, skipping insertion in model container [2020-12-22 05:19:11,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:19:10" (2/3) ... [2020-12-22 05:19:11,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d47f1db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:19:11, skipping insertion in model container [2020-12-22 05:19:11,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:19:11" (3/3) ... [2020-12-22 05:19:11,274 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound10.c [2020-12-22 05:19:11,281 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:19:11,287 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 05:19:11,344 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 05:19:11,372 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:19:11,373 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:19:11,373 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:19:11,373 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:19:11,373 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:19:11,373 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:19:11,373 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:19:11,374 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:19:11,388 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-22 05:19:11,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 05:19:11,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:19:11,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:19:11,395 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:19:11,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:19:11,401 INFO L82 PathProgramCache]: Analyzing trace with hash -144177098, now seen corresponding path program 1 times [2020-12-22 05:19:11,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:19:11,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155814079] [2020-12-22 05:19:11,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:19:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:19:11,590 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 05:19:11,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155814079] [2020-12-22 05:19:11,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:19:11,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:19:11,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777052479] [2020-12-22 05:19:11,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:19:11,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:19:11,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:19:11,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:19:11,616 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-12-22 05:19:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:19:11,634 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2020-12-22 05:19:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:19:11,636 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-12-22 05:19:11,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:19:11,645 INFO L225 Difference]: With dead ends: 45 [2020-12-22 05:19:11,645 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 05:19:11,651 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 05:19:11,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 05:19:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 05:19:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 05:19:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-22 05:19:11,687 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2020-12-22 05:19:11,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:19:11,687 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-22 05:19:11,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:19:11,687 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-22 05:19:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 05:19:11,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:19:11,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:19:11,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:19:11,689 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:19:11,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:19:11,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1281167042, now seen corresponding path program 1 times [2020-12-22 05:19:11,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:19:11,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673217204] [2020-12-22 05:19:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:19:11,716 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:19:11,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379162502] [2020-12-22 05:19:11,716 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 05:19:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:19:11,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:19:11,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:19:12,098 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 05:19:12,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673217204] [2020-12-22 05:19:12,099 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:19:12,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379162502] [2020-12-22 05:19:12,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:19:12,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:19:12,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890397333] [2020-12-22 05:19:12,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:19:12,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:19:12,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:19:12,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:19:12,103 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-12-22 05:19:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:19:16,328 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-22 05:19:16,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:19:16,329 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-22 05:19:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:19:16,330 INFO L225 Difference]: With dead ends: 32 [2020-12-22 05:19:16,330 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 05:19:16,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:19:16,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 05:19:16,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2020-12-22 05:19:16,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 05:19:16,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-22 05:19:16,338 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 13 [2020-12-22 05:19:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:19:16,339 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-22 05:19:16,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:19:16,339 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-22 05:19:16,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:19:16,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:19:16,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:19:16,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:19:16,554 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:19:16,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:19:16,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2131930913, now seen corresponding path program 1 times [2020-12-22 05:19:16,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:19:16,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659637927] [2020-12-22 05:19:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:19:16,575 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:19:16,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201445515] [2020-12-22 05:19:16,575 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 05:19:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:19:16,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 05:19:16,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:19:16,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659637927] [2020-12-22 05:19:16,691 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:19:16,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201445515] [2020-12-22 05:19:16,692 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-22 05:19:16,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:19:16,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-22 05:19:16,693 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-22 05:19:16,693 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:19:16,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:19:16,922 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-22 05:19:16,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:19:16 BoogieIcfgContainer [2020-12-22 05:19:16,923 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:19:16,923 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:19:16,924 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:19:16,924 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:19:16,924 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:19:11" (3/4) ... [2020-12-22 05:19:16,929 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 05:19:16,929 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:19:16,932 INFO L168 Benchmark]: Toolchain (without parser) took 6344.42 ms. Allocated memory is still 172.0 MB. Free memory was 146.3 MB in the beginning and 81.5 MB in the end (delta: 64.8 MB). Peak memory consumption was 66.3 MB. Max. memory is 8.0 GB. [2020-12-22 05:19:16,932 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 172.0 MB. Free memory is still 143.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:19:16,933 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.06 ms. Allocated memory is still 172.0 MB. Free memory was 146.0 MB in the beginning and 136.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 05:19:16,934 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.26 ms. Allocated memory is still 172.0 MB. Free memory was 136.2 MB in the beginning and 134.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:19:16,935 INFO L168 Benchmark]: Boogie Preprocessor took 25.35 ms. Allocated memory is still 172.0 MB. Free memory was 134.6 MB in the beginning and 133.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:19:16,936 INFO L168 Benchmark]: RCFGBuilder took 357.82 ms. Allocated memory is still 172.0 MB. Free memory was 133.4 MB in the beginning and 119.4 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-12-22 05:19:16,937 INFO L168 Benchmark]: TraceAbstraction took 5656.36 ms. Allocated memory is still 172.0 MB. Free memory was 119.0 MB in the beginning and 82.0 MB in the end (delta: 37.0 MB). Peak memory consumption was 39.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:19:16,938 INFO L168 Benchmark]: Witness Printer took 5.96 ms. Allocated memory is still 172.0 MB. Free memory was 82.0 MB in the beginning and 81.5 MB in the end (delta: 524.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:19:16,943 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 172.0 MB. Free memory is still 143.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.06 ms. Allocated memory is still 172.0 MB. Free memory was 146.0 MB in the beginning and 136.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 40.26 ms. Allocated memory is still 172.0 MB. Free memory was 136.2 MB in the beginning and 134.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.35 ms. Allocated memory is still 172.0 MB. Free memory was 134.6 MB in the beginning and 133.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 357.82 ms. Allocated memory is still 172.0 MB. Free memory was 133.4 MB in the beginning and 119.4 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5656.36 ms. Allocated memory is still 172.0 MB. Free memory was 119.0 MB in the beginning and 82.0 MB in the end (delta: 37.0 MB). Peak memory consumption was 39.0 MB. Max. memory is 8.0 GB. * Witness Printer took 5.96 ms. Allocated memory is still 172.0 MB. Free memory was 82.0 MB in the beginning and 81.5 MB in the end (delta: 524.3 kB). 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) [L31] u = ((long long) 2 * R) + 1 [L32] v = 1 [L33] 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, 24 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 5.5s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 28 SDslu, 27 SDs, 0 SdLazy, 46 SolverSat, 8 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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...