/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/divbin_unwindbound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:34:28,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:34:28,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:34:28,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:34:28,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:34:28,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:34:28,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:34:28,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:34:28,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:34:28,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:34:28,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:34:28,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:34:28,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:34:28,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:34:28,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:34:28,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:34:28,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:34:28,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:34:28,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:34:28,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:34:28,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:34:28,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:34:28,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:34:29,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:34:29,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:34:29,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:34:29,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:34:29,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:34:29,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:34:29,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:34:29,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:34:29,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:34:29,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:34:29,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:34:29,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:34:29,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:34:29,015 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 07:34:29,042 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:34:29,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:34:29,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:34:29,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:34:29,044 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:34:29,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:34:29,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:34:29,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:34:29,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:34:29,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:34:29,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:34:29,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:34:29,046 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:34:29,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:34:29,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:34:29,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:34:29,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:34:29,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:34:29,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:34:29,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:34:29,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:34:29,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:34:29,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:34:29,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:34:29,051 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:34:29,051 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:34:29,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:34:29,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:34:29,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:34:29,495 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:34:29,496 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:34:29,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2020-12-23 07:34:29,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/470be7029/bd2cf5e6ea9049a5b5d438dbc2e51316/FLAGc9ed962d9 [2020-12-23 07:34:30,181 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:34:30,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2020-12-23 07:34:30,189 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/470be7029/bd2cf5e6ea9049a5b5d438dbc2e51316/FLAGc9ed962d9 [2020-12-23 07:34:30,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/470be7029/bd2cf5e6ea9049a5b5d438dbc2e51316 [2020-12-23 07:34:30,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:34:30,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:34:30,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:34:30,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:34:30,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:34:30,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:34:30" (1/1) ... [2020-12-23 07:34:30,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19d87009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:30, skipping insertion in model container [2020-12-23 07:34:30,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:34:30" (1/1) ... [2020-12-23 07:34:30,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:34:30,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:34:30,740 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/divbin_unwindbound50.i[950,963] 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,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~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[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2020-12-23 07:34:30,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:34:30,768 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:34:30,780 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/divbin_unwindbound50.i[950,963] 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,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~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[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2020-12-23 07:34:30,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:34:30,802 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:34:30,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:30 WrapperNode [2020-12-23 07:34:30,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:34:30,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:34:30,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:34:30,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:34:30,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:30" (1/1) ... [2020-12-23 07:34:30,821 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:30" (1/1) ... [2020-12-23 07:34:30,853 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:34:30,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:34:30,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:34:30,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:34:30,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:30" (1/1) ... [2020-12-23 07:34:30,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:30" (1/1) ... [2020-12-23 07:34:30,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:30" (1/1) ... [2020-12-23 07:34:30,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:30" (1/1) ... [2020-12-23 07:34:30,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:30" (1/1) ... [2020-12-23 07:34:30,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:30" (1/1) ... [2020-12-23 07:34:30,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:30" (1/1) ... [2020-12-23 07:34:30,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:34:30,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:34:30,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:34:30,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:34:30,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:30" (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 07:34:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:34:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:34:31,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:34:31,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:34:31,257 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:34:31,258 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-23 07:34:31,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:34:31 BoogieIcfgContainer [2020-12-23 07:34:31,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:34:31,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:34:31,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:34:31,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:34:31,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:34:30" (1/3) ... [2020-12-23 07:34:31,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7945c4f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:34:31, skipping insertion in model container [2020-12-23 07:34:31,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:30" (2/3) ... [2020-12-23 07:34:31,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7945c4f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:34:31, skipping insertion in model container [2020-12-23 07:34:31,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:34:31" (3/3) ... [2020-12-23 07:34:31,270 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound50.i [2020-12-23 07:34:31,277 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:34:31,286 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:34:31,332 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:34:31,391 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:34:31,391 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:34:31,392 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:34:31,392 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:34:31,392 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:34:31,422 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:34:31,422 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:34:31,422 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:34:31,438 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-23 07:34:31,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:34:31,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:31,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:31,445 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:31,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:31,456 INFO L82 PathProgramCache]: Analyzing trace with hash 344827834, now seen corresponding path program 1 times [2020-12-23 07:34:31,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:31,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878385486] [2020-12-23 07:34:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:31,732 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 07:34:31,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878385486] [2020-12-23 07:34:31,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:31,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:34:31,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375445193] [2020-12-23 07:34:31,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:34:31,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:31,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:34:31,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:34:31,765 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-12-23 07:34:31,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:31,788 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2020-12-23 07:34:31,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:34:31,790 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 07:34:31,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:31,814 INFO L225 Difference]: With dead ends: 45 [2020-12-23 07:34:31,815 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 07:34:31,819 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 07:34:31,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 07:34:31,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 07:34:31,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 07:34:31,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-23 07:34:31,851 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2020-12-23 07:34:31,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:31,852 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-23 07:34:31,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:34:31,852 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-23 07:34:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 07:34:31,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:31,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:31,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:34:31,854 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:31,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:31,855 INFO L82 PathProgramCache]: Analyzing trace with hash 514095505, now seen corresponding path program 1 times [2020-12-23 07:34:31,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:31,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027711354] [2020-12-23 07:34:31,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:31,878 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:31,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206947329] [2020-12-23 07:34:31,878 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 07:34:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:31,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 07:34:31,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:32,027 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 07:34:32,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027711354] [2020-12-23 07:34:32,028 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:32,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206947329] [2020-12-23 07:34:32,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:32,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:34:32,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091725402] [2020-12-23 07:34:32,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:34:32,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:32,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:34:32,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:34:32,032 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 4 states. [2020-12-23 07:34:32,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:32,051 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-12-23 07:34:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 07:34:32,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-23 07:34:32,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:32,053 INFO L225 Difference]: With dead ends: 33 [2020-12-23 07:34:32,053 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 07:34:32,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:34:32,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 07:34:32,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 07:34:32,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 07:34:32,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-23 07:34:32,060 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2020-12-23 07:34:32,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:32,060 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-23 07:34:32,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:34:32,061 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-23 07:34:32,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:34:32,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:32,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:32,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:34:32,277 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:32,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:32,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1194113768, now seen corresponding path program 1 times [2020-12-23 07:34:32,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:32,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583086827] [2020-12-23 07:34:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:32,308 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:32,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039616597] [2020-12-23 07:34:32,309 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 [2020-12-23 07:34:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:32,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:34:32,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:32,575 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 07:34:32,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583086827] [2020-12-23 07:34:32,576 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:32,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039616597] [2020-12-23 07:34:32,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:32,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 07:34:32,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280059840] [2020-12-23 07:34:32,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:34:32,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:32,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:34:32,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:34:32,580 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 7 states. [2020-12-23 07:34:32,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:32,853 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-12-23 07:34:32,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:34:32,854 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-23 07:34:32,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:32,857 INFO L225 Difference]: With dead ends: 40 [2020-12-23 07:34:32,857 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:34:32,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:34:32,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:34:32,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-12-23 07:34:32,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 07:34:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-23 07:34:32,873 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2020-12-23 07:34:32,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:32,874 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-23 07:34:32,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:34:32,874 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-23 07:34:32,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:34:32,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:32,876 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:33,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:33,091 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:33,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:33,093 INFO L82 PathProgramCache]: Analyzing trace with hash 483460221, now seen corresponding path program 1 times [2020-12-23 07:34:33,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:33,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437893061] [2020-12-23 07:34:33,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:33,120 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:33,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117280626] [2020-12-23 07:34:33,126 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 07:34:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:33,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:34:33,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:33,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437893061] [2020-12-23 07:34:33,224 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:33,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117280626] [2020-12-23 07:34:33,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:33,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 07:34:33,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496914027] [2020-12-23 07:34:33,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:34:33,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:33,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:34:33,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:34:33,227 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2020-12-23 07:34:33,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:33,277 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-12-23 07:34:33,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:34:33,277 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 07:34:33,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:33,281 INFO L225 Difference]: With dead ends: 42 [2020-12-23 07:34:33,281 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 07:34:33,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:34:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 07:34:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-23 07:34:33,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 07:34:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-23 07:34:33,297 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 15 [2020-12-23 07:34:33,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:33,298 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-23 07:34:33,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:34:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-23 07:34:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 07:34:33,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:33,299 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:33,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:33,515 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:33,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:33,516 INFO L82 PathProgramCache]: Analyzing trace with hash -2143807572, now seen corresponding path program 1 times [2020-12-23 07:34:33,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:33,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462394569] [2020-12-23 07:34:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:33,535 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:33,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546805549] [2020-12-23 07:34:33,536 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 [2020-12-23 07:34:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:33,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:34:33,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:33,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462394569] [2020-12-23 07:34:33,895 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:33,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546805549] [2020-12-23 07:34:33,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:33,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:34:33,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159913922] [2020-12-23 07:34:33,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:34:33,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:33,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:34:33,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:34:33,898 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 10 states. [2020-12-23 07:34:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:34,725 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2020-12-23 07:34:34,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:34:34,725 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-12-23 07:34:34,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:34,726 INFO L225 Difference]: With dead ends: 64 [2020-12-23 07:34:34,727 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 07:34:34,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:34:34,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 07:34:34,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2020-12-23 07:34:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 07:34:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-23 07:34:34,733 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 16 [2020-12-23 07:34:34,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:34,733 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-23 07:34:34,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:34:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-23 07:34:34,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:34:34,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:34,735 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:34,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:34,936 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:34,937 INFO L82 PathProgramCache]: Analyzing trace with hash -681488537, now seen corresponding path program 1 times [2020-12-23 07:34:34,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:34,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753256803] [2020-12-23 07:34:34,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:34,964 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:34,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119885106] [2020-12-23 07:34:34,965 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 [2020-12-23 07:34:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:35,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:34:35,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:35,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753256803] [2020-12-23 07:34:35,036 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:35,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119885106] [2020-12-23 07:34:35,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:35,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:34:35,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756055634] [2020-12-23 07:34:35,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:34:35,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:35,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:34:35,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:34:35,038 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2020-12-23 07:34:35,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:35,062 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-12-23 07:34:35,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:34:35,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-23 07:34:35,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:35,063 INFO L225 Difference]: With dead ends: 50 [2020-12-23 07:34:35,064 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 07:34:35,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:34:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 07:34:35,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 07:34:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 07:34:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-23 07:34:35,069 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-12-23 07:34:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:35,069 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-23 07:34:35,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:34:35,069 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-23 07:34:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:34:35,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:35,070 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:35,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:34:35,279 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:35,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:35,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1690106195, now seen corresponding path program 1 times [2020-12-23 07:34:35,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:35,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427715380] [2020-12-23 07:34:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:35,304 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:35,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572329590] [2020-12-23 07:34:35,304 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 [2020-12-23 07:34:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:35,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 07:34:35,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 07:34:35,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427715380] [2020-12-23 07:34:35,518 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:35,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572329590] [2020-12-23 07:34:35,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:35,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:34:35,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194286660] [2020-12-23 07:34:35,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:34:35,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:35,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:34:35,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:34:35,521 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-12-23 07:34:35,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:35,654 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-12-23 07:34:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:34:35,654 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-23 07:34:35,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:35,655 INFO L225 Difference]: With dead ends: 46 [2020-12-23 07:34:35,655 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 07:34:35,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:34:35,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 07:34:35,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-12-23 07:34:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 07:34:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-23 07:34:35,662 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 21 [2020-12-23 07:34:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:35,662 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-23 07:34:35,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:34:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-23 07:34:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 07:34:35,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:35,663 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:35,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:35,870 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:35,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:35,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1038743540, now seen corresponding path program 2 times [2020-12-23 07:34:35,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:35,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620178127] [2020-12-23 07:34:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:35,892 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:35,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239260874] [2020-12-23 07:34:35,893 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 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 07:34:36,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:34:36,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:34:36,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:34:36,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:36,558 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:36,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620178127] [2020-12-23 07:34:36,644 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:36,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239260874] [2020-12-23 07:34:36,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:36,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:34:36,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570884623] [2020-12-23 07:34:36,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:34:36,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:36,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:34:36,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:34:36,646 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2020-12-23 07:34:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:36,943 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-12-23 07:34:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:34:36,944 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-12-23 07:34:36,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:36,945 INFO L225 Difference]: With dead ends: 68 [2020-12-23 07:34:36,945 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 07:34:36,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:34:36,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 07:34:36,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-23 07:34:36,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 07:34:36,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-12-23 07:34:36,951 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 26 [2020-12-23 07:34:36,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:36,951 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-12-23 07:34:36,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:34:36,952 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-12-23 07:34:36,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:34:36,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:36,953 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:37,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:37,158 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:37,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:37,158 INFO L82 PathProgramCache]: Analyzing trace with hash 346519601, now seen corresponding path program 1 times [2020-12-23 07:34:37,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:37,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303341605] [2020-12-23 07:34:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:37,178 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:37,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163103003] [2020-12-23 07:34:37,179 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 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 [2020-12-23 07:34:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:37,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:34:37,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 07:34:37,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303341605] [2020-12-23 07:34:37,281 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:37,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163103003] [2020-12-23 07:34:37,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:37,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 07:34:37,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325587262] [2020-12-23 07:34:37,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:34:37,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:37,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:34:37,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:34:37,283 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 6 states. [2020-12-23 07:34:37,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:37,318 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-12-23 07:34:37,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:34:37,319 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-12-23 07:34:37,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:37,320 INFO L225 Difference]: With dead ends: 57 [2020-12-23 07:34:37,320 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 07:34:37,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:34:37,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 07:34:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-23 07:34:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 07:34:37,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-12-23 07:34:37,326 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2020-12-23 07:34:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:37,326 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-12-23 07:34:37,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:34:37,326 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-12-23 07:34:37,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 07:34:37,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:37,327 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:37,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 07:34:37,541 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:37,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:37,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1597045256, now seen corresponding path program 3 times [2020-12-23 07:34:37,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:37,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233025672] [2020-12-23 07:34:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:37,570 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:37,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056249681] [2020-12-23 07:34:37,570 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true