/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/prod4br-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:56:00,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:56:00,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:56:00,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:56:00,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:56:00,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:56:00,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:56:00,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:56:00,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:56:00,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:56:00,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:56:00,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:56:00,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:56:00,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:56:00,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:56:00,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:56:00,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:56:00,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:56:00,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:56:00,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:56:00,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:56:00,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:56:00,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:56:00,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:56:00,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:56:00,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:56:00,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:56:00,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:56:00,458 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:56:00,512 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:56:00,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:56:00,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:56:00,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:56:00,516 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:56:00,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:56:00,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:56:00,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:56:00,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:56:00,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:56:00,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:56:00,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:56:00,519 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:56:00,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:56:00,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:56:00,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:56:00,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:56:00,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:56:00,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:56:00,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:56:00,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:56:00,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:56:00,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:56:00,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:56:00,522 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:56:00,522 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:56:00,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:56:00,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:56:00,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:56:00,963 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:56:00,964 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:56:00,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c [2021-01-06 17:56:01,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f70b77522/09fbc34d5ef44ac390542bfbfc6ec970/FLAG502e4f400 [2021-01-06 17:56:01,721 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:56:01,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c [2021-01-06 17:56:01,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f70b77522/09fbc34d5ef44ac390542bfbfc6ec970/FLAG502e4f400 [2021-01-06 17:56:02,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f70b77522/09fbc34d5ef44ac390542bfbfc6ec970 [2021-01-06 17:56:02,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:56:02,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:56:02,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:56:02,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:56:02,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:56:02,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:56:02" (1/1) ... [2021-01-06 17:56:02,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3daecb84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:56:02, skipping insertion in model container [2021-01-06 17:56:02,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:56:02" (1/1) ... [2021-01-06 17:56:02,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:56:02,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:56:02,314 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/nla-digbench-scaling/prod4br-ll_valuebound10.c[524,537] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] [2021-01-06 17:56:02,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:56:02,349 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:56:02,364 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/nla-digbench-scaling/prod4br-ll_valuebound10.c[524,537] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] [2021-01-06 17:56:02,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:56:02,394 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:56:02,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:56:02 WrapperNode [2021-01-06 17:56:02,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:56:02,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:56:02,396 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:56:02,396 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:56:02,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:56:02" (1/1) ... [2021-01-06 17:56:02,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:56:02" (1/1) ... [2021-01-06 17:56:02,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:56:02,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:56:02,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:56:02,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:56:02,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:56:02" (1/1) ... [2021-01-06 17:56:02,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:56:02" (1/1) ... [2021-01-06 17:56:02,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:56:02" (1/1) ... [2021-01-06 17:56:02,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:56:02" (1/1) ... [2021-01-06 17:56:02,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:56:02" (1/1) ... [2021-01-06 17:56:02,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:56:02" (1/1) ... [2021-01-06 17:56:02,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:56:02" (1/1) ... [2021-01-06 17:56:02,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:56:02,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:56:02,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:56:02,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:56:02,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:56:02" (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 [2021-01-06 17:56:02,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:56:02,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:56:02,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:56:02,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:56:02,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:56:02,931 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-01-06 17:56:02,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:56:02 BoogieIcfgContainer [2021-01-06 17:56:02,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:56:02,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:56:02,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:56:02,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:56:02,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:56:02" (1/3) ... [2021-01-06 17:56:02,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d012e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:56:02, skipping insertion in model container [2021-01-06 17:56:02,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:56:02" (2/3) ... [2021-01-06 17:56:02,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d012e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:56:02, skipping insertion in model container [2021-01-06 17:56:02,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:56:02" (3/3) ... [2021-01-06 17:56:02,952 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound10.c [2021-01-06 17:56:02,965 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:56:02,978 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-01-06 17:56:03,020 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 17:56:03,074 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:56:03,075 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:56:03,075 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:56:03,076 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:56:03,078 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:56:03,078 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:56:03,079 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:56:03,079 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:56:03,100 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2021-01-06 17:56:03,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:56:03,107 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:03,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:03,109 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:03,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:03,117 INFO L82 PathProgramCache]: Analyzing trace with hash 330581779, now seen corresponding path program 1 times [2021-01-06 17:56:03,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:03,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293767145] [2021-01-06 17:56:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:56:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:03,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293767145] [2021-01-06 17:56:03,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:56:03,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:56:03,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993882766] [2021-01-06 17:56:03,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:56:03,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:03,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:56:03,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:56:03,369 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2021-01-06 17:56:03,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:03,386 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2021-01-06 17:56:03,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:56:03,388 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 17:56:03,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:03,397 INFO L225 Difference]: With dead ends: 53 [2021-01-06 17:56:03,398 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 17:56:03,401 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 [2021-01-06 17:56:03,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 17:56:03,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 17:56:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 17:56:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-01-06 17:56:03,437 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2021-01-06 17:56:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:03,437 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-01-06 17:56:03,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:56:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-01-06 17:56:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:56:03,438 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:03,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:03,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:56:03,439 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:03,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:03,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1507472743, now seen corresponding path program 1 times [2021-01-06 17:56:03,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:03,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371797539] [2021-01-06 17:56:03,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:03,461 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:03,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955005598] [2021-01-06 17:56:03,462 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 [2021-01-06 17:56:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:56:03,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 17:56:03,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:03,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371797539] [2021-01-06 17:56:03,751 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:03,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955005598] [2021-01-06 17:56:03,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:56:03,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:56:03,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695238887] [2021-01-06 17:56:03,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:56:03,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:03,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:56:03,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:56:03,756 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2021-01-06 17:56:04,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:04,016 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-01-06 17:56:04,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:56:04,017 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-01-06 17:56:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:04,018 INFO L225 Difference]: With dead ends: 41 [2021-01-06 17:56:04,019 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 17:56:04,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:56:04,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 17:56:04,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-01-06 17:56:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 17:56:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-01-06 17:56:04,028 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2021-01-06 17:56:04,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:04,029 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-01-06 17:56:04,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:56:04,029 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-01-06 17:56:04,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:56:04,030 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:04,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:04,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:56:04,245 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:04,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:04,247 INFO L82 PathProgramCache]: Analyzing trace with hash -937517175, now seen corresponding path program 1 times [2021-01-06 17:56:04,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:04,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398724825] [2021-01-06 17:56:04,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:04,273 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:04,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551886530] [2021-01-06 17:56:04,274 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 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 [2021-01-06 17:56:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:56:04,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 17:56:04,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:04,669 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:56:11,889 WARN L197 SmtUtils]: Spent 7.07 s on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-01-06 17:56:12,025 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:56:12,028 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:56:12,035 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:56:12,043 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:56:12,048 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:56:12,052 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:56:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:12,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398724825] [2021-01-06 17:56:12,185 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:12,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551886530] [2021-01-06 17:56:12,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:56:12,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-01-06 17:56:12,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703405593] [2021-01-06 17:56:12,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:56:12,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:12,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:56:12,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:56:12,189 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 13 states. [2021-01-06 17:56:12,515 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 12 [2021-01-06 17:56:12,751 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-01-06 17:56:17,533 WARN L197 SmtUtils]: Spent 4.75 s on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-01-06 17:56:17,781 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-01-06 17:56:18,043 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 24 [2021-01-06 17:56:18,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:18,534 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-01-06 17:56:18,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:56:18,535 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2021-01-06 17:56:18,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:18,537 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:56:18,537 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 17:56:18,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:56:18,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 17:56:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-01-06 17:56:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:56:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-01-06 17:56:18,544 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 14 [2021-01-06 17:56:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:18,544 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-01-06 17:56:18,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:56:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-01-06 17:56:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:56:18,545 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:18,545 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:18,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:18,760 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:18,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:18,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1003041614, now seen corresponding path program 1 times [2021-01-06 17:56:18,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:18,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698002712] [2021-01-06 17:56:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:18,781 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:18,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439713547] [2021-01-06 17:56:18,782 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 [2021-01-06 17:56:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:56:18,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 17:56:18,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:19,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:56:19,166 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:56:19,191 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:56:19,205 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:56:19,310 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:56:19,417 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:56:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:19,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698002712] [2021-01-06 17:56:19,478 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:19,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439713547] [2021-01-06 17:56:19,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:19,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:56:19,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156033171] [2021-01-06 17:56:19,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:56:19,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:19,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:56:19,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:56:19,482 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 9 states. [2021-01-06 17:56:20,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:20,122 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2021-01-06 17:56:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:56:20,124 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2021-01-06 17:56:20,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:20,125 INFO L225 Difference]: With dead ends: 47 [2021-01-06 17:56:20,126 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 17:56:20,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:56:20,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 17:56:20,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2021-01-06 17:56:20,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:56:20,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-01-06 17:56:20,143 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 15 [2021-01-06 17:56:20,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:20,144 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-01-06 17:56:20,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:56:20,145 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-01-06 17:56:20,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:56:20,146 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:20,146 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:20,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:20,361 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:20,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:20,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1032048289, now seen corresponding path program 1 times [2021-01-06 17:56:20,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:20,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239334501] [2021-01-06 17:56:20,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:20,381 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:20,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581396453] [2021-01-06 17:56:20,381 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 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 [2021-01-06 17:56:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:56:20,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 17:56:20,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:20,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239334501] [2021-01-06 17:56:20,653 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:20,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581396453] [2021-01-06 17:56:20,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:20,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:56:20,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980575404] [2021-01-06 17:56:20,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:56:20,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:20,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:56:20,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:56:20,656 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 8 states. [2021-01-06 17:56:27,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:27,206 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2021-01-06 17:56:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:56:27,207 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2021-01-06 17:56:27,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:27,208 INFO L225 Difference]: With dead ends: 49 [2021-01-06 17:56:27,208 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 17:56:27,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:56:27,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 17:56:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2021-01-06 17:56:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:56:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-01-06 17:56:27,216 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2021-01-06 17:56:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:27,217 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-01-06 17:56:27,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:56:27,217 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-01-06 17:56:27,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:56:27,218 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:27,218 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:27,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:27,434 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:27,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:27,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1931404169, now seen corresponding path program 1 times [2021-01-06 17:56:27,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:27,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064399424] [2021-01-06 17:56:27,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:27,463 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:27,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63390632] [2021-01-06 17:56:27,463 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 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 [2021-01-06 17:56:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:56:27,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 17:56:27,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:29,784 WARN L197 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2021-01-06 17:56:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:29,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064399424] [2021-01-06 17:56:29,888 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:29,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63390632] [2021-01-06 17:56:29,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:29,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:56:29,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170142504] [2021-01-06 17:56:29,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:56:29,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:29,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:56:29,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:56:29,891 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 8 states. [2021-01-06 17:56:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:32,532 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2021-01-06 17:56:32,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:56:32,533 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2021-01-06 17:56:32,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:32,534 INFO L225 Difference]: With dead ends: 63 [2021-01-06 17:56:32,534 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 17:56:32,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:56:32,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 17:56:32,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-01-06 17:56:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:56:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-01-06 17:56:32,543 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 17 [2021-01-06 17:56:32,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:32,543 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-01-06 17:56:32,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:56:32,543 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-01-06 17:56:32,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:56:32,544 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:32,544 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:32,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:56:32,760 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:32,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:32,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1931463751, now seen corresponding path program 1 times [2021-01-06 17:56:32,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:32,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249694657] [2021-01-06 17:56:32,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:32,789 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:32,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245635132] [2021-01-06 17:56:32,790 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 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 [2021-01-06 17:56:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:56:32,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 17:56:32,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:33,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249694657] [2021-01-06 17:56:33,112 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:33,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245635132] [2021-01-06 17:56:33,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:56:33,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:56:33,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767673994] [2021-01-06 17:56:33,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:56:33,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:33,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:56:33,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:56:33,138 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 8 states. [2021-01-06 17:56:33,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:33,475 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-01-06 17:56:33,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:56:33,477 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2021-01-06 17:56:33,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:33,479 INFO L225 Difference]: With dead ends: 55 [2021-01-06 17:56:33,479 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 17:56:33,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:56:33,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 17:56:33,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2021-01-06 17:56:33,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:56:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-01-06 17:56:33,488 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 17 [2021-01-06 17:56:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:33,489 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-01-06 17:56:33,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:56:33,489 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-01-06 17:56:33,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:56:33,490 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:33,490 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:33,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:33,704 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:33,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:33,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1530166964, now seen corresponding path program 1 times [2021-01-06 17:56:33,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:33,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237843604] [2021-01-06 17:56:33,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:33,724 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:33,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280424913] [2021-01-06 17:56:33,724 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 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 [2021-01-06 17:56:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:56:33,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:56:33,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:56:33,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237843604] [2021-01-06 17:56:33,958 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:56:33,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280424913] [2021-01-06 17:56:33,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:56:33,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 17:56:33,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952352650] [2021-01-06 17:56:33,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:56:33,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:56:33,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:56:33,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:56:33,964 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 8 states. [2021-01-06 17:56:34,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:56:34,329 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2021-01-06 17:56:34,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:56:34,330 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2021-01-06 17:56:34,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:56:34,331 INFO L225 Difference]: With dead ends: 71 [2021-01-06 17:56:34,331 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 17:56:34,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:56:34,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 17:56:34,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 50. [2021-01-06 17:56:34,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 17:56:34,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-01-06 17:56:34,342 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 18 [2021-01-06 17:56:34,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:56:34,342 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-01-06 17:56:34,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:56:34,343 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-01-06 17:56:34,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:56:34,344 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:56:34,344 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:56:34,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:34,557 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:56:34,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:56:34,559 INFO L82 PathProgramCache]: Analyzing trace with hash 191838595, now seen corresponding path program 2 times [2021-01-06 17:56:34,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:56:34,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051099716] [2021-01-06 17:56:34,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:56:34,582 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:56:34,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452160034] [2021-01-06 17:56:34,582 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:56:34,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:56:34,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:56:34,653 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 17:56:34,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:56:37,049 WARN L197 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 22 [2021-01-06 17:56:51,459 WARN L197 SmtUtils]: Spent 7.48 s on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-01-06 17:56:51,817 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2021-01-06 17:56:51,890 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:56:53,662 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:56:57,808 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:57:01,965 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:57:04,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051099716] [2021-01-06 17:57:04,863 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:57:04,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452160034] [2021-01-06 17:57:04,864 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2021-01-06 17:57:04,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:57:04,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:57:04,864 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:57:04,864 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:57:05,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:57:05,088 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:57:05,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:57:05 BoogieIcfgContainer [2021-01-06 17:57:05,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:57:05,089 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:57:05,089 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:57:05,089 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:57:05,090 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:56:02" (3/4) ... [2021-01-06 17:57:05,094 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:57:05,094 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:57:05,096 INFO L168 Benchmark]: Toolchain (without parser) took 62993.63 ms. Allocated memory was 158.3 MB in the beginning and 229.6 MB in the end (delta: 71.3 MB). Free memory was 133.6 MB in the beginning and 191.1 MB in the end (delta: -57.5 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:05,096 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 158.3 MB. Free memory is still 132.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:57:05,097 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.34 ms. Allocated memory is still 158.3 MB. Free memory was 133.3 MB in the beginning and 123.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:05,097 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.14 ms. Allocated memory is still 158.3 MB. Free memory was 123.1 MB in the beginning and 121.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:05,098 INFO L168 Benchmark]: Boogie Preprocessor took 29.91 ms. Allocated memory is still 158.3 MB. Free memory was 121.4 MB in the beginning and 120.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:05,099 INFO L168 Benchmark]: RCFGBuilder took 462.86 ms. Allocated memory is still 158.3 MB. Free memory was 120.2 MB in the beginning and 136.9 MB in the end (delta: -16.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:05,100 INFO L168 Benchmark]: TraceAbstraction took 62153.64 ms. Allocated memory was 158.3 MB in the beginning and 229.6 MB in the end (delta: 71.3 MB). Free memory was 136.4 MB in the beginning and 191.6 MB in the end (delta: -55.2 MB). Peak memory consumption was 142.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:05,100 INFO L168 Benchmark]: Witness Printer took 5.26 ms. Allocated memory is still 229.6 MB. Free memory was 191.6 MB in the beginning and 191.1 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:57:05,104 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 158.3 MB. Free memory is still 132.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 288.34 ms. Allocated memory is still 158.3 MB. Free memory was 133.3 MB in the beginning and 123.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 43.14 ms. Allocated memory is still 158.3 MB. Free memory was 123.1 MB in the beginning and 121.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.91 ms. Allocated memory is still 158.3 MB. Free memory was 121.4 MB in the beginning and 120.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 462.86 ms. Allocated memory is still 158.3 MB. Free memory was 120.2 MB in the beginning and 136.9 MB in the end (delta: -16.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 62153.64 ms. Allocated memory was 158.3 MB in the beginning and 229.6 MB in the end (delta: 71.3 MB). Free memory was 136.4 MB in the beginning and 191.6 MB in the end (delta: -55.2 MB). Peak memory consumption was 142.0 MB. Max. memory is 8.0 GB. * Witness Printer took 5.26 ms. Allocated memory is still 229.6 MB. Free memory was 191.6 MB in the beginning and 191.1 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] int x, y; [L21] long long a, b, p, q; [L23] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L25] y = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L9] COND FALSE !(!cond) [L29] a = x [L30] b = y [L31] p = 1 [L32] q = 0 [L34] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L37] COND FALSE !(!(a != 0 && b != 0)) [L40] COND TRUE a % 2 == 0 && b % 2 == 0 [L41] a = a / 2 [L42] b = b / 2 [L43] p = 4 * p [L34] COND TRUE 1 [L12] COND FALSE !(!(cond)) [L37] COND FALSE !(!(a != 0 && b != 0)) [L40] COND TRUE a % 2 == 0 && b % 2 == 0 [L41] a = a / 2 [L42] b = b / 2 [L43] p = 4 * p [L34] COND TRUE 1 [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 62.0s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 17.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 139 SDtfs, 641 SDslu, 317 SDs, 0 SdLazy, 663 SolverSat, 182 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 9.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 137 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 17.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=8, 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, 8 MinimizatonAttempts, 85 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 119 NumberOfCodeBlocks, 119 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 111 ConstructedInterpolants, 1 QuantifiedInterpolants, 18930 SizeOfPredicates, 74 NumberOfNonLiveVariables, 578 ConjunctsInSsa, 207 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 3/11 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...