/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/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:46:09,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:46:09,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:46:09,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:46:09,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:46:09,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:46:09,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:46:09,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:46:09,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:46:09,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:46:09,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:46:09,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:46:09,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:46:09,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:46:09,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:46:09,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:46:09,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:46:09,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:46:09,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:46:09,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:46:09,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:46:09,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:46:09,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:46:09,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:46:09,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:46:09,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:46:09,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:46:09,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:46:09,324 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:46:09,383 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:46:09,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:46:09,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:46:09,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:46:09,386 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:46:09,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:46:09,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:46:09,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:46:09,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:46:09,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:46:09,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:46:09,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:46:09,391 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:46:09,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:46:09,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:46:09,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:46:09,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:46:09,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:46:09,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:46:09,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:46:09,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:46:09,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:46:09,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:46:09,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:46:09,393 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:46:09,393 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:46:09,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:46:09,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:46:09,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:46:09,953 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:46:09,954 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:46:09,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01_bug02.i [2020-12-23 06:46:10,050 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a4de3604d/cdf5e366f88f4d589c602fa339db80cc/FLAG6a700409e [2020-12-23 06:46:10,658 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:46:10,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02.i [2020-12-23 06:46:10,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a4de3604d/cdf5e366f88f4d589c602fa339db80cc/FLAG6a700409e [2020-12-23 06:46:11,021 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a4de3604d/cdf5e366f88f4d589c602fa339db80cc [2020-12-23 06:46:11,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:46:11,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:46:11,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:46:11,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:46:11,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:46:11,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:46:11" (1/1) ... [2020-12-23 06:46:11,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d4eaabe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:11, skipping insertion in model container [2020-12-23 06:46:11,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:46:11" (1/1) ... [2020-12-23 06:46:11,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:46:11,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:46:11,253 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02.i[812,825] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sn~0,] [2020-12-23 06:46:11,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:46:11,283 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:46:11,299 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02.i[812,825] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sn~0,] [2020-12-23 06:46:11,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:46:11,322 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:46:11,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:11 WrapperNode [2020-12-23 06:46:11,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:46:11,324 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:46:11,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:46:11,325 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:46:11,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:11" (1/1) ... [2020-12-23 06:46:11,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:11" (1/1) ... [2020-12-23 06:46:11,364 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:46:11,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:46:11,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:46:11,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:46:11,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:11" (1/1) ... [2020-12-23 06:46:11,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:11" (1/1) ... [2020-12-23 06:46:11,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:11" (1/1) ... [2020-12-23 06:46:11,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:11" (1/1) ... [2020-12-23 06:46:11,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:11" (1/1) ... [2020-12-23 06:46:11,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:11" (1/1) ... [2020-12-23 06:46:11,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:11" (1/1) ... [2020-12-23 06:46:11,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:46:11,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:46:11,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:46:11,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:46:11,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:46:11,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:46:11,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:46:11,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:46:11,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:46:11,926 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:46:11,929 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:46:11,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:46:11 BoogieIcfgContainer [2020-12-23 06:46:11,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:46:11,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:46:11,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:46:11,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:46:11,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:46:11" (1/3) ... [2020-12-23 06:46:11,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184ebafa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:46:11, skipping insertion in model container [2020-12-23 06:46:11,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:11" (2/3) ... [2020-12-23 06:46:11,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184ebafa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:46:11, skipping insertion in model container [2020-12-23 06:46:11,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:46:11" (3/3) ... [2020-12-23 06:46:11,954 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-12-23 06:46:11,966 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:46:11,972 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:46:12,000 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:46:12,036 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:46:12,036 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:46:12,036 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:46:12,037 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:46:12,037 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:46:12,037 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:46:12,037 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:46:12,037 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:46:12,055 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-23 06:46:12,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:46:12,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:12,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:46:12,064 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:12,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:12,074 INFO L82 PathProgramCache]: Analyzing trace with hash 889999271, now seen corresponding path program 1 times [2020-12-23 06:46:12,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:12,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130010162] [2020-12-23 06:46:12,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:12,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130010162] [2020-12-23 06:46:12,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:46:12,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:46:12,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560045709] [2020-12-23 06:46:12,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:46:12,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:12,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:46:12,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:46:12,407 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-23 06:46:12,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:12,427 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-23 06:46:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:46:12,429 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-23 06:46:12,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:12,456 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:46:12,456 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:46:12,462 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 [2020-12-23 06:46:12,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:46:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 06:46:12,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 06:46:12,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-23 06:46:12,508 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-23 06:46:12,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:12,509 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-23 06:46:12,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:46:12,510 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-23 06:46:12,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:46:12,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:12,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:46:12,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:46:12,513 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:12,519 INFO L82 PathProgramCache]: Analyzing trace with hash 889611988, now seen corresponding path program 1 times [2020-12-23 06:46:12,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:12,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431064923] [2020-12-23 06:46:12,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:12,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431064923] [2020-12-23 06:46:12,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:46:12,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:46:12,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137433312] [2020-12-23 06:46:12,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:46:12,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:12,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:46:12,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:46:12,748 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2020-12-23 06:46:12,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:12,880 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2020-12-23 06:46:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:46:12,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 06:46:12,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:12,892 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:46:12,892 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 06:46:12,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:46:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 06:46:12,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 06:46:12,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:46:12,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-23 06:46:12,898 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2020-12-23 06:46:12,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:12,899 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-23 06:46:12,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:46:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-23 06:46:12,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:46:12,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:12,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:12,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:46:12,901 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:12,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:12,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1711509127, now seen corresponding path program 1 times [2020-12-23 06:46:12,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:12,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745850299] [2020-12-23 06:46:12,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:13,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745850299] [2020-12-23 06:46:13,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574350295] [2020-12-23 06:46:13,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:46:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:13,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 06:46:13,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:13,518 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:46:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:13,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:13,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-12-23 06:46:13,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533152256] [2020-12-23 06:46:13,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:46:13,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:13,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:46:13,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:46:13,560 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 12 states. [2020-12-23 06:46:13,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:13,764 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-12-23 06:46:13,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:46:13,765 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-12-23 06:46:13,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:13,767 INFO L225 Difference]: With dead ends: 28 [2020-12-23 06:46:13,767 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 06:46:13,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:46:13,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 06:46:13,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2020-12-23 06:46:13,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 06:46:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-23 06:46:13,775 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 10 [2020-12-23 06:46:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:13,775 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-23 06:46:13,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:46:13,775 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-23 06:46:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:46:13,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:13,776 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:13,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:46:13,992 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:13,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:13,993 INFO L82 PathProgramCache]: Analyzing trace with hash 703766942, now seen corresponding path program 2 times [2020-12-23 06:46:13,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:13,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942090803] [2020-12-23 06:46:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:14,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942090803] [2020-12-23 06:46:14,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661916557] [2020-12-23 06:46:14,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:46:14,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:46:14,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:14,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 06:46:14,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:14,781 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:46:14,789 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:46:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:14,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:14,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-12-23 06:46:14,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446213824] [2020-12-23 06:46:14,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:46:14,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:14,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:46:14,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:46:14,841 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 16 states. [2020-12-23 06:46:15,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:15,456 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-12-23 06:46:15,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:46:15,457 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-12-23 06:46:15,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:15,458 INFO L225 Difference]: With dead ends: 42 [2020-12-23 06:46:15,458 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 06:46:15,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:46:15,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 06:46:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2020-12-23 06:46:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 06:46:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-12-23 06:46:15,466 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2020-12-23 06:46:15,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:15,466 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-12-23 06:46:15,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:46:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-12-23 06:46:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:46:15,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:15,468 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:15,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:15,682 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:15,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:15,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1816192992, now seen corresponding path program 1 times [2020-12-23 06:46:15,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:15,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118978692] [2020-12-23 06:46:15,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:15,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118978692] [2020-12-23 06:46:15,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433714003] [2020-12-23 06:46:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:46:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:15,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:46:15,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:15,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:15,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 06:46:15,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769635076] [2020-12-23 06:46:15,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:46:15,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:15,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:46:15,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:46:15,870 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 8 states. [2020-12-23 06:46:15,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:15,905 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-12-23 06:46:15,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:46:15,906 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-23 06:46:15,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:15,906 INFO L225 Difference]: With dead ends: 35 [2020-12-23 06:46:15,907 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 06:46:15,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:46:15,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 06:46:15,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 06:46:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 06:46:15,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-23 06:46:15,912 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2020-12-23 06:46:15,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:15,913 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-23 06:46:15,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:46:15,913 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-23 06:46:15,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:46:15,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:15,914 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:16,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:16,129 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:16,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:16,130 INFO L82 PathProgramCache]: Analyzing trace with hash -551113275, now seen corresponding path program 2 times [2020-12-23 06:46:16,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:16,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066059449] [2020-12-23 06:46:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:16,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066059449] [2020-12-23 06:46:16,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748072937] [2020-12-23 06:46:16,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:46:16,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:46:16,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:16,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:46:16,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:16,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:16,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-23 06:46:16,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688723994] [2020-12-23 06:46:16,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:46:16,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:16,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:46:16,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=70, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:46:16,388 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 12 states. [2020-12-23 06:46:16,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:16,433 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-12-23 06:46:16,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:46:16,433 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-12-23 06:46:16,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:16,434 INFO L225 Difference]: With dead ends: 31 [2020-12-23 06:46:16,434 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 06:46:16,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=70, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:46:16,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 06:46:16,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 06:46:16,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 06:46:16,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-23 06:46:16,439 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2020-12-23 06:46:16,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:16,440 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-23 06:46:16,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:46:16,440 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-23 06:46:16,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:46:16,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:16,441 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:16,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:16,653 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:16,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:16,654 INFO L82 PathProgramCache]: Analyzing trace with hash -234589592, now seen corresponding path program 3 times [2020-12-23 06:46:16,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:16,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572950742] [2020-12-23 06:46:16,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 06:46:16,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572950742] [2020-12-23 06:46:16,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953296704] [2020-12-23 06:46:16,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:16,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 06:46:16,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:16,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 06:46:16,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:17,184 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:46:17,187 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:46:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:17,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:17,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2020-12-23 06:46:17,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661668882] [2020-12-23 06:46:17,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:46:17,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:17,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:46:17,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:46:17,212 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 21 states. [2020-12-23 06:46:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:17,945 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-12-23 06:46:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:46:17,948 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2020-12-23 06:46:17,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:17,949 INFO L225 Difference]: With dead ends: 44 [2020-12-23 06:46:17,949 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 06:46:17,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:46:17,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 06:46:17,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2020-12-23 06:46:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 06:46:17,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-23 06:46:17,962 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 22 [2020-12-23 06:46:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:17,962 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-23 06:46:17,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:46:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-23 06:46:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:46:17,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:17,963 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:18,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 06:46:18,177 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:18,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:18,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1540417770, now seen corresponding path program 3 times [2020-12-23 06:46:18,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:18,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450574215] [2020-12-23 06:46:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:18,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450574215] [2020-12-23 06:46:18,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118175161] [2020-12-23 06:46:18,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:18,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 06:46:18,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:18,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:46:18,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:18,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:18,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 06:46:18,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780860586] [2020-12-23 06:46:18,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:46:18,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:18,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:46:18,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=131, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:46:18,515 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 16 states. [2020-12-23 06:46:18,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:18,583 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-12-23 06:46:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:46:18,584 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2020-12-23 06:46:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:18,585 INFO L225 Difference]: With dead ends: 37 [2020-12-23 06:46:18,585 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 06:46:18,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=131, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:46:18,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 06:46:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-23 06:46:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 06:46:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-23 06:46:18,590 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-12-23 06:46:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:18,591 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-23 06:46:18,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:46:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-23 06:46:18,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:46:18,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:18,592 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:18,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:18,807 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:18,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:18,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1259402865, now seen corresponding path program 4 times [2020-12-23 06:46:18,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:18,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123332196] [2020-12-23 06:46:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:18,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123332196] [2020-12-23 06:46:18,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267728155] [2020-12-23 06:46:18,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:18,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:46:18,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:18,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:46:18,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:19,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:19,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-23 06:46:19,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608175348] [2020-12-23 06:46:19,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:46:19,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:19,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:46:19,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=212, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:46:19,184 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 20 states. [2020-12-23 06:46:19,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:19,269 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-12-23 06:46:19,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:46:19,269 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2020-12-23 06:46:19,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:19,270 INFO L225 Difference]: With dead ends: 42 [2020-12-23 06:46:19,270 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 06:46:19,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=212, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:46:19,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 06:46:19,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-12-23 06:46:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 06:46:19,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-23 06:46:19,276 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-12-23 06:46:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:19,277 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-23 06:46:19,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:46:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-23 06:46:19,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:46:19,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:19,278 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:19,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:19,492 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:19,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:19,493 INFO L82 PathProgramCache]: Analyzing trace with hash 454184884, now seen corresponding path program 5 times [2020-12-23 06:46:19,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:19,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509540963] [2020-12-23 06:46:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:46:19,513 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:46:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:46:19,536 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:46:19,559 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 06:46:19,560 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 06:46:19,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 06:46:19,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:46:19 BoogieIcfgContainer [2020-12-23 06:46:19,599 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:46:19,599 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:46:19,599 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:46:19,600 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:46:19,600 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:46:11" (3/4) ... [2020-12-23 06:46:19,603 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 06:46:19,691 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/sum01_bug02.i-witness.graphml [2020-12-23 06:46:19,691 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:46:19,694 INFO L168 Benchmark]: Toolchain (without parser) took 8665.53 ms. Allocated memory was 155.2 MB in the beginning and 220.2 MB in the end (delta: 65.0 MB). Free memory was 130.8 MB in the beginning and 161.5 MB in the end (delta: -30.7 MB). Peak memory consumption was 35.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:19,694 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 155.2 MB. Free memory is still 129.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:46:19,695 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.47 ms. Allocated memory is still 155.2 MB. Free memory was 130.5 MB in the beginning and 121.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:19,695 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.22 ms. Allocated memory is still 155.2 MB. Free memory was 121.0 MB in the beginning and 119.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:19,696 INFO L168 Benchmark]: Boogie Preprocessor took 26.56 ms. Allocated memory is still 155.2 MB. Free memory was 119.7 MB in the beginning and 118.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:19,698 INFO L168 Benchmark]: RCFGBuilder took 538.60 ms. Allocated memory is still 155.2 MB. Free memory was 118.6 MB in the beginning and 107.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:19,699 INFO L168 Benchmark]: TraceAbstraction took 7663.50 ms. Allocated memory was 155.2 MB in the beginning and 220.2 MB in the end (delta: 65.0 MB). Free memory was 106.7 MB in the beginning and 164.1 MB in the end (delta: -57.4 MB). Peak memory consumption was 7.9 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:19,699 INFO L168 Benchmark]: Witness Printer took 91.64 ms. Allocated memory is still 220.2 MB. Free memory was 164.1 MB in the beginning and 161.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:19,707 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 155.2 MB. Free memory is still 129.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 292.47 ms. Allocated memory is still 155.2 MB. Free memory was 130.5 MB in the beginning and 121.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 40.22 ms. Allocated memory is still 155.2 MB. Free memory was 121.0 MB in the beginning and 119.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.56 ms. Allocated memory is still 155.2 MB. Free memory was 119.7 MB in the beginning and 118.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 538.60 ms. Allocated memory is still 155.2 MB. Free memory was 118.6 MB in the beginning and 107.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7663.50 ms. Allocated memory was 155.2 MB in the beginning and 220.2 MB in the end (delta: 65.0 MB). Free memory was 106.7 MB in the beginning and 164.1 MB in the end (delta: -57.4 MB). Peak memory consumption was 7.9 MB. Max. memory is 8.0 GB. * Witness Printer took 91.64 ms. Allocated memory is still 220.2 MB. Free memory was 164.1 MB in the beginning and 161.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i