/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/ps4-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 08:05:04,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 08:05:04,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 08:05:04,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 08:05:04,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 08:05:04,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 08:05:04,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 08:05:04,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 08:05:04,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 08:05:04,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 08:05:04,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 08:05:04,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 08:05:04,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 08:05:04,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 08:05:04,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 08:05:04,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 08:05:04,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 08:05:04,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 08:05:04,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 08:05:04,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 08:05:04,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 08:05:04,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 08:05:04,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 08:05:04,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 08:05:04,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 08:05:04,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 08:05:04,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 08:05:04,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 08:05:04,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 08:05:04,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 08:05:04,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 08:05:04,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 08:05:04,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 08:05:04,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 08:05:04,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 08:05:04,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 08:05:04,367 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 08:05:04,426 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 08:05:04,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 08:05:04,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 08:05:04,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 08:05:04,433 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 08:05:04,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 08:05:04,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 08:05:04,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 08:05:04,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 08:05:04,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 08:05:04,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 08:05:04,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 08:05:04,436 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 08:05:04,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 08:05:04,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 08:05:04,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 08:05:04,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 08:05:04,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 08:05:04,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 08:05:04,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 08:05:04,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 08:05:04,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 08:05:04,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 08:05:04,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 08:05:04,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 08:05:04,439 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 08:05:04,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 08:05:04,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 08:05:04,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 08:05:04,919 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 08:05:04,920 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 08:05:04,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c [2020-12-23 08:05:05,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ccdc51aab/cedd2108351b4910923dbe0d2d2313ab/FLAGa3de2a04c [2020-12-23 08:05:05,649 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 08:05:05,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c [2020-12-23 08:05:05,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ccdc51aab/cedd2108351b4910923dbe0d2d2313ab/FLAGa3de2a04c [2020-12-23 08:05:06,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ccdc51aab/cedd2108351b4910923dbe0d2d2313ab [2020-12-23 08:05:06,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 08:05:06,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 08:05:06,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 08:05:06,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 08:05:06,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 08:05:06,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:05:06" (1/1) ... [2020-12-23 08:05:06,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6de2e0b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:06, skipping insertion in model container [2020-12-23 08:05:06,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 08:05:06" (1/1) ... [2020-12-23 08:05:06,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 08:05:06,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 08:05:06,243 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/ps4-ll_valuebound20.c[458,471] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 08:05:06,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:05:06,276 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 08:05:06,292 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/ps4-ll_valuebound20.c[458,471] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 08:05:06,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 08:05:06,319 INFO L208 MainTranslator]: Completed translation [2020-12-23 08:05:06,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:06 WrapperNode [2020-12-23 08:05:06,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 08:05:06,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 08:05:06,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 08:05:06,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 08:05:06,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:06" (1/1) ... [2020-12-23 08:05:06,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:06" (1/1) ... [2020-12-23 08:05:06,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 08:05:06,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 08:05:06,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 08:05:06,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 08:05:06,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:06" (1/1) ... [2020-12-23 08:05:06,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:06" (1/1) ... [2020-12-23 08:05:06,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:06" (1/1) ... [2020-12-23 08:05:06,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:06" (1/1) ... [2020-12-23 08:05:06,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:06" (1/1) ... [2020-12-23 08:05:06,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:06" (1/1) ... [2020-12-23 08:05:06,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:06" (1/1) ... [2020-12-23 08:05:06,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 08:05:06,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 08:05:06,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 08:05:06,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 08:05:06,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:06" (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 08:05:06,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 08:05:06,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 08:05:06,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 08:05:06,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 08:05:06,848 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 08:05:06,849 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-23 08:05:06,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:05:06 BoogieIcfgContainer [2020-12-23 08:05:06,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 08:05:06,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 08:05:06,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 08:05:06,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 08:05:06,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 08:05:06" (1/3) ... [2020-12-23 08:05:06,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66f7039c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:05:06, skipping insertion in model container [2020-12-23 08:05:06,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 08:05:06" (2/3) ... [2020-12-23 08:05:06,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66f7039c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 08:05:06, skipping insertion in model container [2020-12-23 08:05:06,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 08:05:06" (3/3) ... [2020-12-23 08:05:06,917 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound20.c [2020-12-23 08:05:06,933 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 08:05:06,958 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-23 08:05:06,989 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-23 08:05:07,023 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 08:05:07,024 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 08:05:07,024 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 08:05:07,024 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 08:05:07,024 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 08:05:07,024 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 08:05:07,025 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 08:05:07,025 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 08:05:07,043 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-23 08:05:07,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 08:05:07,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:07,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:07,051 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:07,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:07,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2020-12-23 08:05:07,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:07,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302879508] [2020-12-23 08:05:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:05:07,252 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 08:05:07,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302879508] [2020-12-23 08:05:07,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:05:07,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 08:05:07,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711767910] [2020-12-23 08:05:07,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 08:05:07,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:07,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 08:05:07,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 08:05:07,283 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-23 08:05:07,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:07,305 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2020-12-23 08:05:07,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 08:05:07,306 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-23 08:05:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:07,316 INFO L225 Difference]: With dead ends: 39 [2020-12-23 08:05:07,317 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 08:05:07,321 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 08:05:07,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 08:05:07,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 08:05:07,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 08:05:07,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-23 08:05:07,364 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 7 [2020-12-23 08:05:07,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:07,364 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-23 08:05:07,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 08:05:07,365 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-23 08:05:07,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 08:05:07,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:07,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:07,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 08:05:07,366 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:07,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:07,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2020-12-23 08:05:07,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:07,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470783047] [2020-12-23 08:05:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:07,387 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:07,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746554663] [2020-12-23 08:05:07,388 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 08:05:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:05:07,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 08:05:07,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:05:07,627 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 08:05:07,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470783047] [2020-12-23 08:05:07,628 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:05:07,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746554663] [2020-12-23 08:05:07,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 08:05:07,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 08:05:07,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104070051] [2020-12-23 08:05:07,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 08:05:07,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:07,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 08:05:07,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 08:05:07,633 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-12-23 08:05:07,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:07,834 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-12-23 08:05:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 08:05:07,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 08:05:07,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:07,836 INFO L225 Difference]: With dead ends: 31 [2020-12-23 08:05:07,836 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 08:05:07,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:05:07,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 08:05:07,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-23 08:05:07,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 08:05:07,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-23 08:05:07,844 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 7 [2020-12-23 08:05:07,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:07,844 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-23 08:05:07,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 08:05:07,845 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-23 08:05:07,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 08:05:07,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:07,846 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:08,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 08:05:08,060 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:08,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:08,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1864186656, now seen corresponding path program 1 times [2020-12-23 08:05:08,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:08,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51003655] [2020-12-23 08:05:08,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:08,076 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:08,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036401160] [2020-12-23 08:05:08,077 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 08:05:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:05:08,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 08:05:08,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:05:08,296 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 08:05:08,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51003655] [2020-12-23 08:05:08,297 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:05:08,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036401160] [2020-12-23 08:05:08,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:05:08,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 08:05:08,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324851756] [2020-12-23 08:05:08,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 08:05:08,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:08,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 08:05:08,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 08:05:08,300 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 6 states. [2020-12-23 08:05:08,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:08,528 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-23 08:05:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:05:08,529 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 08:05:08,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:08,530 INFO L225 Difference]: With dead ends: 34 [2020-12-23 08:05:08,530 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 08:05:08,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 08:05:08,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 08:05:08,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-12-23 08:05:08,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 08:05:08,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-12-23 08:05:08,544 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 10 [2020-12-23 08:05:08,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:08,544 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-12-23 08:05:08,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 08:05:08,545 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-12-23 08:05:08,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 08:05:08,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:08,548 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:08,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:05:08,749 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:08,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:08,751 INFO L82 PathProgramCache]: Analyzing trace with hash -2052598129, now seen corresponding path program 2 times [2020-12-23 08:05:08,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:08,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187828817] [2020-12-23 08:05:08,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:08,777 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:08,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570545090] [2020-12-23 08:05:08,778 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 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 08:05:08,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 08:05:08,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 08:05:08,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 08:05:08,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:05:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 08:05:09,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187828817] [2020-12-23 08:05:09,100 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:05:09,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570545090] [2020-12-23 08:05:09,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:05:09,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:05:09,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276330667] [2020-12-23 08:05:09,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:05:09,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:09,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:05:09,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:05:09,104 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-12-23 08:05:09,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:09,289 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-12-23 08:05:09,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 08:05:09,290 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-23 08:05:09,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:09,291 INFO L225 Difference]: With dead ends: 41 [2020-12-23 08:05:09,292 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 08:05:09,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 08:05:09,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 08:05:09,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-12-23 08:05:09,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 08:05:09,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-23 08:05:09,311 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2020-12-23 08:05:09,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:09,311 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-23 08:05:09,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:05:09,311 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-23 08:05:09,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 08:05:09,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:09,314 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:09,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:05:09,529 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:09,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:09,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2052638844, now seen corresponding path program 1 times [2020-12-23 08:05:09,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:09,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141616654] [2020-12-23 08:05:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:09,545 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:09,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776839408] [2020-12-23 08:05:09,546 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 08:05:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 08:05:09,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 08:05:09,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 08:05:09,898 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 08:05:09,924 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 08:05:09,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141616654] [2020-12-23 08:05:09,925 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 08:05:09,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776839408] [2020-12-23 08:05:09,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 08:05:09,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 08:05:09,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246149985] [2020-12-23 08:05:09,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 08:05:09,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 08:05:09,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 08:05:09,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 08:05:09,933 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-12-23 08:05:10,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 08:05:10,319 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-12-23 08:05:10,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 08:05:10,320 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-23 08:05:10,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 08:05:10,321 INFO L225 Difference]: With dead ends: 32 [2020-12-23 08:05:10,322 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 08:05:10,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-23 08:05:10,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 08:05:10,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 08:05:10,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 08:05:10,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-23 08:05:10,329 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 13 [2020-12-23 08:05:10,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 08:05:10,329 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-23 08:05:10,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 08:05:10,330 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-23 08:05:10,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 08:05:10,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 08:05:10,330 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 08:05:10,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 08:05:10,544 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 08:05:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 08:05:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1496534400, now seen corresponding path program 3 times [2020-12-23 08:05:10,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 08:05:10,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497254999] [2020-12-23 08:05:10,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 08:05:10,559 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 08:05:10,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900272141] [2020-12-23 08:05:10,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true