/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/ps6-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 18:08:43,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 18:08:43,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 18:08:43,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 18:08:43,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 18:08:43,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 18:08:43,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 18:08:43,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 18:08:43,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 18:08:43,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 18:08:43,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 18:08:43,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 18:08:43,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 18:08:43,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 18:08:43,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 18:08:43,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 18:08:43,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 18:08:43,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 18:08:43,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 18:08:43,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 18:08:43,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 18:08:43,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 18:08:43,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 18:08:43,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 18:08:43,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 18:08:43,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 18:08:43,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 18:08:43,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 18:08:43,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 18:08:43,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 18:08:43,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 18:08:44,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 18:08:44,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 18:08:44,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 18:08:44,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 18:08:44,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 18:08:44,004 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 18:08:44,031 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 18:08:44,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 18:08:44,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 18:08:44,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 18:08:44,034 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 18:08:44,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 18:08:44,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 18:08:44,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 18:08:44,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 18:08:44,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 18:08:44,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 18:08:44,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 18:08:44,036 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 18:08:44,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 18:08:44,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 18:08:44,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 18:08:44,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 18:08:44,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 18:08:44,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 18:08:44,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 18:08:44,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 18:08:44,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 18:08:44,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 18:08:44,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 18:08:44,039 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 18:08:44,039 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 18:08:44,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 18:08:44,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 18:08:44,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 18:08:44,515 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 18:08:44,516 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 18:08:44,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound2.c [2021-01-06 18:08:44,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/001fe8506/7a97693beb7f43ae9b415b64c251456a/FLAGea24637fe [2021-01-06 18:08:45,365 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 18:08:45,366 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound2.c [2021-01-06 18:08:45,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/001fe8506/7a97693beb7f43ae9b415b64c251456a/FLAGea24637fe [2021-01-06 18:08:45,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/001fe8506/7a97693beb7f43ae9b415b64c251456a [2021-01-06 18:08:45,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 18:08:45,716 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 18:08:45,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 18:08:45,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 18:08:45,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 18:08:45,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 06:08:45" (1/1) ... [2021-01-06 18:08:45,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d42b138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:45, skipping insertion in model container [2021-01-06 18:08:45,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 06:08:45" (1/1) ... [2021-01-06 18:08:45,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 18:08:45,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 18:08:45,918 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/ps6-ll_valuebound2.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,] [2021-01-06 18:08:45,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 18:08:45,953 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 18:08:45,969 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/ps6-ll_valuebound2.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,] [2021-01-06 18:08:45,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 18:08:45,997 INFO L208 MainTranslator]: Completed translation [2021-01-06 18:08:45,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:45 WrapperNode [2021-01-06 18:08:45,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 18:08:45,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 18:08:45,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 18:08:45,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 18:08:46,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:45" (1/1) ... [2021-01-06 18:08:46,018 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:45" (1/1) ... [2021-01-06 18:08:46,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 18:08:46,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 18:08:46,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 18:08:46,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 18:08:46,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:45" (1/1) ... [2021-01-06 18:08:46,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:45" (1/1) ... [2021-01-06 18:08:46,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:45" (1/1) ... [2021-01-06 18:08:46,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:45" (1/1) ... [2021-01-06 18:08:46,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:45" (1/1) ... [2021-01-06 18:08:46,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:45" (1/1) ... [2021-01-06 18:08:46,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:45" (1/1) ... [2021-01-06 18:08:46,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 18:08:46,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 18:08:46,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 18:08:46,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 18:08:46,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 18:08:46,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 18:08:46,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 18:08:46,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 18:08:46,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 18:08:46,665 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 18:08:46,665 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 18:08:46,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 06:08:46 BoogieIcfgContainer [2021-01-06 18:08:46,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 18:08:46,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 18:08:46,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 18:08:46,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 18:08:46,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 06:08:45" (1/3) ... [2021-01-06 18:08:46,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa579ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 06:08:46, skipping insertion in model container [2021-01-06 18:08:46,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:45" (2/3) ... [2021-01-06 18:08:46,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa579ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 06:08:46, skipping insertion in model container [2021-01-06 18:08:46,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 06:08:46" (3/3) ... [2021-01-06 18:08:46,710 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound2.c [2021-01-06 18:08:46,727 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 18:08:46,736 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-01-06 18:08:46,790 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 18:08:46,843 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 18:08:46,843 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 18:08:46,843 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 18:08:46,844 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 18:08:46,845 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 18:08:46,846 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 18:08:46,846 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 18:08:46,846 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 18:08:46,867 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-01-06 18:08:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 18:08:46,882 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:08:46,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:08:46,885 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:08:46,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:08:46,893 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2021-01-06 18:08:46,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:08:46,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037848520] [2021-01-06 18:08:46,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:08:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:08:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:08:47,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037848520] [2021-01-06 18:08:47,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:08:47,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 18:08:47,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534382944] [2021-01-06 18:08:47,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 18:08:47,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:08:47,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 18:08:47,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 18:08:47,177 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2021-01-06 18:08:47,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:08:47,205 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2021-01-06 18:08:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 18:08:47,207 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 18:08:47,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:08:47,228 INFO L225 Difference]: With dead ends: 43 [2021-01-06 18:08:47,229 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 18:08:47,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 18:08:47,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 18:08:47,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 18:08:47,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 18:08:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-01-06 18:08:47,285 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 9 [2021-01-06 18:08:47,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:08:47,286 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-01-06 18:08:47,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 18:08:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-01-06 18:08:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 18:08:47,287 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:08:47,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:08:47,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 18:08:47,289 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:08:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:08:47,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2021-01-06 18:08:47,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:08:47,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214453570] [2021-01-06 18:08:47,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:08:47,343 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:08:47,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207177088] [2021-01-06 18:08:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:08:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:08:47,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 18:08:47,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:08:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:08:47,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214453570] [2021-01-06 18:08:47,568 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:08:47,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207177088] [2021-01-06 18:08:47,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:08:47,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 18:08:47,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264190630] [2021-01-06 18:08:47,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 18:08:47,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:08:47,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 18:08:47,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 18:08:47,573 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 5 states. [2021-01-06 18:08:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:08:50,045 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-01-06 18:08:50,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 18:08:50,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-01-06 18:08:50,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:08:50,047 INFO L225 Difference]: With dead ends: 33 [2021-01-06 18:08:50,048 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 18:08:50,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 18:08:50,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 18:08:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-01-06 18:08:50,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 18:08:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-01-06 18:08:50,055 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 9 [2021-01-06 18:08:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:08:50,056 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-01-06 18:08:50,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 18:08:50,056 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-01-06 18:08:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 18:08:50,057 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:08:50,057 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:08:50,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 18:08:50,273 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:08:50,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:08:50,275 INFO L82 PathProgramCache]: Analyzing trace with hash 636965506, now seen corresponding path program 1 times [2021-01-06 18:08:50,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:08:50,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137870587] [2021-01-06 18:08:50,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:08:50,299 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:08:50,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521359721] [2021-01-06 18:08:50,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:08:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:08:50,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 18:08:50,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:08:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:08:50,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137870587] [2021-01-06 18:08:50,497 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:08:50,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521359721] [2021-01-06 18:08:50,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:08:50,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 18:08:50,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66356347] [2021-01-06 18:08:50,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 18:08:50,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:08:50,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 18:08:50,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 18:08:50,506 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2021-01-06 18:08:52,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:08:52,867 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-01-06 18:08:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 18:08:52,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-01-06 18:08:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:08:52,870 INFO L225 Difference]: With dead ends: 36 [2021-01-06 18:08:52,870 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 18:08:52,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 18:08:52,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 18:08:52,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2021-01-06 18:08:52,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 18:08:52,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-01-06 18:08:52,880 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 12 [2021-01-06 18:08:52,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:08:52,880 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-01-06 18:08:52,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 18:08:52,880 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-01-06 18:08:52,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 18:08:52,881 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:08:52,881 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:08:53,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:08:53,098 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:08:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:08:53,099 INFO L82 PathProgramCache]: Analyzing trace with hash 678815956, now seen corresponding path program 2 times [2021-01-06 18:08:53,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:08:53,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115568672] [2021-01-06 18:08:53,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:08:53,115 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:08:53,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148741249] [2021-01-06 18:08:53,116 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 [2021-01-06 18:08:53,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 18:08:53,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:08:53,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 18:08:53,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:08:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:08:53,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115568672] [2021-01-06 18:08:53,426 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:08:53,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148741249] [2021-01-06 18:08:53,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:08:53,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 18:08:53,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213925907] [2021-01-06 18:08:53,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 18:08:53,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:08:53,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 18:08:53,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 18:08:53,428 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2021-01-06 18:08:54,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:08:54,042 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-01-06 18:08:54,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 18:08:54,043 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2021-01-06 18:08:54,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:08:54,044 INFO L225 Difference]: With dead ends: 45 [2021-01-06 18:08:54,045 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 18:08:54,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 18:08:54,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 18:08:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2021-01-06 18:08:54,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 18:08:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-01-06 18:08:54,053 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 15 [2021-01-06 18:08:54,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:08:54,053 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-01-06 18:08:54,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 18:08:54,054 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-01-06 18:08:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 18:08:54,054 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:08:54,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:08:54,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:08:54,258 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:08:54,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:08:54,259 INFO L82 PathProgramCache]: Analyzing trace with hash -531865812, now seen corresponding path program 1 times [2021-01-06 18:08:54,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:08:54,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29259882] [2021-01-06 18:08:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:08:54,274 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:08:54,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163142016] [2021-01-06 18:08:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:08:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:08:54,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 18:08:54,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:08:54,585 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 18:08:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:08:54,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29259882] [2021-01-06 18:08:54,615 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:08:54,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163142016] [2021-01-06 18:08:54,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:08:54,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 18:08:54,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550217855] [2021-01-06 18:08:54,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 18:08:54,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:08:54,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 18:08:54,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 18:08:54,626 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2021-01-06 18:08:54,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:08:54,945 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-01-06 18:08:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 18:08:54,946 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2021-01-06 18:08:54,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:08:54,948 INFO L225 Difference]: With dead ends: 36 [2021-01-06 18:08:54,949 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 18:08:54,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-01-06 18:08:54,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 18:08:54,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 18:08:54,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 18:08:54,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-01-06 18:08:54,959 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 17 [2021-01-06 18:08:54,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:08:54,960 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-01-06 18:08:54,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 18:08:54,960 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-01-06 18:08:54,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 18:08:54,961 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:08:54,961 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:08:55,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:08:55,176 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:08:55,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:08:55,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1905056066, now seen corresponding path program 3 times [2021-01-06 18:08:55,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:08:55,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502792431] [2021-01-06 18:08:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:08:55,200 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:08:55,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018969340] [2021-01-06 18:08:55,201 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