/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/ps2-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:39:56,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:39:56,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:39:56,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 05:39:56,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:39:56,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:39:56,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:39:56,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:39:56,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:39:56,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:39:56,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:39:56,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:39:56,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:39:56,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:39:56,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:39:56,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:39:56,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:39:56,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:39:56,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:39:56,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:39:56,679 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:39:56,721 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:39:56,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:39:56,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:39:56,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:39:56,723 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:39:56,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:39:56,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:39:56,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:39:56,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:39:56,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:39:56,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:39:56,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:39:56,725 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:39:56,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:39:56,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:39:56,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:39:56,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:39:56,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:39:56,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:39:56,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:39:56,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:39:56,727 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:39:56,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:39:56,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:39:56,727 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:39:56,728 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:39:57,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:39:57,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:39:57,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:39:57,111 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:39:57,112 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:39:57,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound10.c [2020-12-22 05:39:57,186 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7b81f143/dc2a121cc5a0412dbb54ed5f98f06cea/FLAGa4a3146f2 [2020-12-22 05:39:57,761 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:39:57,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_valuebound10.c [2020-12-22 05:39:57,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7b81f143/dc2a121cc5a0412dbb54ed5f98f06cea/FLAGa4a3146f2 [2020-12-22 05:39:58,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7b81f143/dc2a121cc5a0412dbb54ed5f98f06cea [2020-12-22 05:39:58,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:39:58,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:39:58,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:39:58,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:39:58,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:39:58,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:39:58" (1/1) ... [2020-12-22 05:39:58,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50caf2cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:39:58, skipping insertion in model container [2020-12-22 05:39:58,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:39:58" (1/1) ... [2020-12-22 05:39:58,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:39:58,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:39:58,383 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/ps2-ll_valuebound10.c[454,467] [2020-12-22 05:39:58,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:39:58,411 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:39:58,426 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/ps2-ll_valuebound10.c[454,467] [2020-12-22 05:39:58,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:39:58,447 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:39:58,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:39:58 WrapperNode [2020-12-22 05:39:58,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:39:58,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:39:58,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:39:58,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:39:58,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:39:58" (1/1) ... [2020-12-22 05:39:58,466 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:39:58" (1/1) ... [2020-12-22 05:39:58,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:39:58,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:39:58,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:39:58,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:39:58,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:39:58" (1/1) ... [2020-12-22 05:39:58,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:39:58" (1/1) ... [2020-12-22 05:39:58,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:39:58" (1/1) ... [2020-12-22 05:39:58,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:39:58" (1/1) ... [2020-12-22 05:39:58,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:39:58" (1/1) ... [2020-12-22 05:39:58,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:39:58" (1/1) ... [2020-12-22 05:39:58,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:39:58" (1/1) ... [2020-12-22 05:39:58,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:39:58,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:39:58,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:39:58,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:39:58,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:39:58" (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 05:39:58,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:39:58,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:39:58,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:39:58,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:39:58,878 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:39:58,878 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 05:39:58,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:39:58 BoogieIcfgContainer [2020-12-22 05:39:58,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:39:58,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:39:58,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:39:58,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:39:58,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:39:58" (1/3) ... [2020-12-22 05:39:58,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225a9d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:39:58, skipping insertion in model container [2020-12-22 05:39:58,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:39:58" (2/3) ... [2020-12-22 05:39:58,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225a9d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:39:58, skipping insertion in model container [2020-12-22 05:39:58,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:39:58" (3/3) ... [2020-12-22 05:39:58,890 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_valuebound10.c [2020-12-22 05:39:58,898 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:39:58,903 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 05:39:58,926 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 05:39:58,961 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:39:58,962 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:39:58,962 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:39:58,962 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:39:58,962 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:39:58,962 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:39:58,962 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:39:58,963 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:39:59,036 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-22 05:39:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 05:39:59,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:39:59,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:39:59,043 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:39:59,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:39:59,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2020-12-22 05:39:59,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:39:59,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403806540] [2020-12-22 05:39:59,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:39:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:39:59,314 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 05:39:59,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403806540] [2020-12-22 05:39:59,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:39:59,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:39:59,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013723789] [2020-12-22 05:39:59,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:39:59,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:39:59,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:39:59,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:39:59,355 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-22 05:39:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:39:59,378 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2020-12-22 05:39:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:39:59,380 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-22 05:39:59,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:39:59,406 INFO L225 Difference]: With dead ends: 31 [2020-12-22 05:39:59,406 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 05:39:59,410 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 05:39:59,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 05:39:59,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 05:39:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 05:39:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-22 05:39:59,452 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2020-12-22 05:39:59,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:39:59,453 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-22 05:39:59,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:39:59,453 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-22 05:39:59,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 05:39:59,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:39:59,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:39:59,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:39:59,456 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:39:59,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:39:59,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2020-12-22 05:39:59,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:39:59,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334140000] [2020-12-22 05:39:59,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:39:59,504 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:39:59,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112263598] [2020-12-22 05:39:59,505 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 05:39:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:39:59,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 05:39:59,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:39:59,716 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 05:39:59,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334140000] [2020-12-22 05:39:59,717 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:39:59,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112263598] [2020-12-22 05:39:59,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:39:59,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:39:59,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505481458] [2020-12-22 05:39:59,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:39:59,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:39:59,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:39:59,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:39:59,721 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-12-22 05:39:59,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:39:59,794 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-22 05:39:59,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:39:59,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-22 05:39:59,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:39:59,795 INFO L225 Difference]: With dead ends: 23 [2020-12-22 05:39:59,795 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 05:39:59,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:39:59,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 05:39:59,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-22 05:39:59,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 05:39:59,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-22 05:39:59,801 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2020-12-22 05:39:59,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:39:59,802 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-22 05:39:59,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:39:59,802 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-22 05:39:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 05:39:59,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:39:59,803 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:00,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:40:00,018 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:00,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:00,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1864186656, now seen corresponding path program 1 times [2020-12-22 05:40:00,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:00,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991301783] [2020-12-22 05:40:00,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:00,033 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:00,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445401288] [2020-12-22 05:40:00,034 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 05:40:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:00,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:40:00,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:00,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991301783] [2020-12-22 05:40:00,143 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:00,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445401288] [2020-12-22 05:40:00,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:00,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:40:00,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855447898] [2020-12-22 05:40:00,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:40:00,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:00,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:40:00,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:40:00,147 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 6 states. [2020-12-22 05:40:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:00,312 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-22 05:40:00,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:40:00,313 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 05:40:00,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:00,314 INFO L225 Difference]: With dead ends: 26 [2020-12-22 05:40:00,314 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 05:40:00,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:40:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 05:40:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-22 05:40:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 05:40:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-22 05:40:00,333 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2020-12-22 05:40:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:00,334 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-22 05:40:00,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:40:00,334 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-22 05:40:00,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 05:40:00,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:00,335 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:00,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:00,551 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:00,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:00,552 INFO L82 PathProgramCache]: Analyzing trace with hash -2052598129, now seen corresponding path program 2 times [2020-12-22 05:40:00,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:00,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716803004] [2020-12-22 05:40:00,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:00,566 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:00,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596025815] [2020-12-22 05:40:00,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:00,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:40:00,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:40:00,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 05:40:00,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:00,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716803004] [2020-12-22 05:40:00,730 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:00,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596025815] [2020-12-22 05:40:00,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:00,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:40:00,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684978242] [2020-12-22 05:40:00,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:40:00,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:00,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:40:00,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:40:00,733 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-12-22 05:40:00,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:00,848 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-12-22 05:40:00,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 05:40:00,848 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-22 05:40:00,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:00,851 INFO L225 Difference]: With dead ends: 29 [2020-12-22 05:40:00,854 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 05:40:00,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:40:00,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 05:40:00,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-22 05:40:00,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 05:40:00,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-22 05:40:00,862 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2020-12-22 05:40:00,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:00,862 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-22 05:40:00,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:40:00,863 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-22 05:40:00,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:40:00,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:00,864 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:01,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:01,078 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:01,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1496534400, now seen corresponding path program 3 times [2020-12-22 05:40:01,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:01,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565723714] [2020-12-22 05:40:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:01,098 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:01,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507656659] [2020-12-22 05:40:01,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:01,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 05:40:01,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:40:01,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 05:40:01,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:01,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565723714] [2020-12-22 05:40:01,234 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:01,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507656659] [2020-12-22 05:40:01,235 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-22 05:40:01,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:40:01,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-22 05:40:01,236 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-22 05:40:01,236 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:40:01,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:01,472 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-22 05:40:01,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:40:01 BoogieIcfgContainer [2020-12-22 05:40:01,472 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:40:01,473 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:40:01,473 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:40:01,473 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:40:01,474 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:39:58" (3/4) ... [2020-12-22 05:40:01,478 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 05:40:01,478 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:40:01,480 INFO L168 Benchmark]: Toolchain (without parser) took 3269.52 ms. Allocated memory was 151.0 MB in the beginning and 208.7 MB in the end (delta: 57.7 MB). Free memory was 125.8 MB in the beginning and 165.5 MB in the end (delta: -39.7 MB). Peak memory consumption was 19.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:01,481 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 151.0 MB. Free memory is still 123.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:40:01,485 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.05 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 115.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:01,488 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.94 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 114.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:01,489 INFO L168 Benchmark]: Boogie Preprocessor took 22.43 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 113.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:01,489 INFO L168 Benchmark]: RCFGBuilder took 368.96 ms. Allocated memory is still 151.0 MB. Free memory was 113.0 MB in the beginning and 100.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:01,491 INFO L168 Benchmark]: TraceAbstraction took 2590.57 ms. Allocated memory was 151.0 MB in the beginning and 208.7 MB in the end (delta: 57.7 MB). Free memory was 100.4 MB in the beginning and 166.0 MB in the end (delta: -65.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:40:01,494 INFO L168 Benchmark]: Witness Printer took 4.89 ms. Allocated memory is still 208.7 MB. Free memory is still 165.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:40:01,505 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 151.0 MB. Free memory is still 123.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 235.05 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 115.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 37.94 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 114.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 22.43 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 113.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 368.96 ms. Allocated memory is still 151.0 MB. Free memory was 113.0 MB in the beginning and 100.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2590.57 ms. Allocated memory was 151.0 MB in the beginning and 208.7 MB in the end (delta: 57.7 MB). Free memory was 100.4 MB in the beginning and 166.0 MB in the end (delta: -65.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 4.89 ms. Allocated memory is still 208.7 MB. Free memory is still 165.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: 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: [L18] int k; [L19] long long y, x, c; [L20] k = __VERIFIER_nondet_int() [L7] COND FALSE !(!cond) [L23] y = 0 [L24] x = 0 [L25] c = 0 [L27] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y + x [L27] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y + x [L27] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y + x [L27] COND TRUE 1 [L10] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 2.4s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 49 SDslu, 64 SDs, 0 SdLazy, 87 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=4, 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, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 1305 SizeOfPredicates, 20 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/9 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...