/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_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 18:08:58,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 18:08:58,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 18:08:58,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 18:08:58,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 18:08:58,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 18:08:58,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 18:08:58,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 18:08:58,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 18:08:58,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 18:08:58,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 18:08:58,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 18:08:58,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 18:08:58,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 18:08:58,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 18:08:58,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 18:08:58,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 18:08:58,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 18:08:58,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 18:08:58,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 18:08:58,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 18:08:58,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 18:08:58,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 18:08:58,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 18:08:58,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 18:08:58,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 18:08:58,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 18:08:58,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 18:08:58,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 18:08:58,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 18:08:58,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 18:08:58,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 18:08:58,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 18:08:58,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 18:08:58,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 18:08:58,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 18:08:58,357 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 18:08:58,383 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 18:08:58,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 18:08:58,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 18:08:58,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 18:08:58,385 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 18:08:58,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 18:08:58,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 18:08:58,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 18:08:58,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 18:08:58,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 18:08:58,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 18:08:58,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 18:08:58,387 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 18:08:58,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 18:08:58,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 18:08:58,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 18:08:58,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 18:08:58,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 18:08:58,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 18:08:58,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 18:08:58,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 18:08:58,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 18:08:58,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 18:08:58,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 18:08:58,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 18:08:58,390 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 18:08:58,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 18:08:58,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 18:08:58,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 18:08:58,782 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 18:08:58,783 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 18:08:58,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound50.c [2021-01-06 18:08:58,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a26f391f9/a39fadf1d6ec49969f915a06a91a30be/FLAGd29cadf2d [2021-01-06 18:08:59,437 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 18:08:59,437 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound50.c [2021-01-06 18:08:59,444 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a26f391f9/a39fadf1d6ec49969f915a06a91a30be/FLAGd29cadf2d [2021-01-06 18:08:59,786 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a26f391f9/a39fadf1d6ec49969f915a06a91a30be [2021-01-06 18:08:59,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 18:08:59,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 18:08:59,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 18:08:59,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 18:08:59,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 18:08:59,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 06:08:59" (1/1) ... [2021-01-06 18:08:59,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b945e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:08:59, skipping insertion in model container [2021-01-06 18:08:59,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 06:08:59" (1/1) ... [2021-01-06 18:08:59,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 18:08:59,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 18:08:59,994 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_valuebound50.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 18:09:00,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 18:09:00,026 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 18:09:00,041 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_valuebound50.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 18:09:00,050 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 18:09:00,067 INFO L208 MainTranslator]: Completed translation [2021-01-06 18:09:00,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:00 WrapperNode [2021-01-06 18:09:00,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 18:09:00,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 18:09:00,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 18:09:00,069 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 18:09:00,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:00" (1/1) ... [2021-01-06 18:09:00,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:00" (1/1) ... [2021-01-06 18:09:00,109 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 18:09:00,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 18:09:00,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 18:09:00,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 18:09:00,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:00" (1/1) ... [2021-01-06 18:09:00,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:00" (1/1) ... [2021-01-06 18:09:00,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:00" (1/1) ... [2021-01-06 18:09:00,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:00" (1/1) ... [2021-01-06 18:09:00,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:00" (1/1) ... [2021-01-06 18:09:00,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:00" (1/1) ... [2021-01-06 18:09:00,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:00" (1/1) ... [2021-01-06 18:09:00,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 18:09:00,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 18:09:00,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 18:09:00,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 18:09:00,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:00" (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 18:09:00,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 18:09:00,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 18:09:00,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 18:09:00,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 18:09:00,557 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 18:09:00,557 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 18:09:00,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 06:09:00 BoogieIcfgContainer [2021-01-06 18:09:00,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 18:09:00,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 18:09:00,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 18:09:00,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 18:09:00,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 06:08:59" (1/3) ... [2021-01-06 18:09:00,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67675832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 06:09:00, skipping insertion in model container [2021-01-06 18:09:00,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:09:00" (2/3) ... [2021-01-06 18:09:00,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67675832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 06:09:00, skipping insertion in model container [2021-01-06 18:09:00,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 06:09:00" (3/3) ... [2021-01-06 18:09:00,570 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound50.c [2021-01-06 18:09:00,577 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 18:09:00,583 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-01-06 18:09:00,631 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 18:09:00,658 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 18:09:00,659 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 18:09:00,659 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 18:09:00,659 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 18:09:00,659 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 18:09:00,659 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 18:09:00,660 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 18:09:00,660 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 18:09:00,677 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-01-06 18:09:00,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 18:09:00,682 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:00,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:09:00,684 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:00,691 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2021-01-06 18:09:00,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:00,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804560830] [2021-01-06 18:09:00,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:09:00,860 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 18:09:00,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804560830] [2021-01-06 18:09:00,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:09:00,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 18:09:00,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239623965] [2021-01-06 18:09:00,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 18:09:00,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:00,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 18:09:00,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 18:09:00,886 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2021-01-06 18:09:00,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:09:00,905 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2021-01-06 18:09:00,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 18:09:00,906 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 18:09:00,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:09:00,915 INFO L225 Difference]: With dead ends: 43 [2021-01-06 18:09:00,916 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 18:09:00,919 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 18:09:00,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 18:09:00,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 18:09:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 18:09:00,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-01-06 18:09:00,955 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 9 [2021-01-06 18:09:00,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:09:00,955 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-01-06 18:09:00,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 18:09:00,956 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-01-06 18:09:00,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 18:09:00,956 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:09:00,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:09:00,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 18:09:00,957 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:09:00,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:09:00,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2021-01-06 18:09:00,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:09:00,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767925287] [2021-01-06 18:09:00,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:09:00,982 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:09:00,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501724228] [2021-01-06 18:09:00,983 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 18:09:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:09:01,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 18:09:01,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:09:01,179 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 18:09:01,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767925287] [2021-01-06 18:09:01,180 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:09:01,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501724228] [2021-01-06 18:09:01,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:09:01,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 18:09:01,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179322039] [2021-01-06 18:09:01,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 18:09:01,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:09:01,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 18:09:01,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 18:09:01,184 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 5 states. [2021-01-06 18:10:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:10:41,474 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-01-06 18:10:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 18:10:41,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-01-06 18:10:41,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:10:41,476 INFO L225 Difference]: With dead ends: 33 [2021-01-06 18:10:41,476 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 18:10:41,478 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 18:10:41,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 18:10:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-01-06 18:10:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 18:10:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-01-06 18:10:41,484 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 9 [2021-01-06 18:10:41,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:10:41,485 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-01-06 18:10:41,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 18:10:41,485 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-01-06 18:10:41,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 18:10:41,486 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:10:41,486 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:10:41,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 18:10:41,701 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:10:41,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:10:41,703 INFO L82 PathProgramCache]: Analyzing trace with hash 636965506, now seen corresponding path program 1 times [2021-01-06 18:10:41,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:10:41,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078394863] [2021-01-06 18:10:41,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:10:41,747 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:10:41,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604936295] [2021-01-06 18:10:41,750 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 18:10:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:10:41,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 18:10:41,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:10:41,907 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 18:10:41,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078394863] [2021-01-06 18:10:41,907 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:10:41,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604936295] [2021-01-06 18:10:41,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:10:41,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 18:10:41,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217344909] [2021-01-06 18:10:41,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 18:10:41,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:10:41,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 18:10:41,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 18:10:41,911 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2021-01-06 18:10:44,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:10:44,300 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-01-06 18:10:44,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 18:10:44,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-01-06 18:10:44,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:10:44,302 INFO L225 Difference]: With dead ends: 36 [2021-01-06 18:10:44,302 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 18:10:44,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 18:10:44,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 18:10:44,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2021-01-06 18:10:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 18:10:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-01-06 18:10:44,312 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 12 [2021-01-06 18:10:44,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:10:44,312 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-01-06 18:10:44,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 18:10:44,312 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-01-06 18:10:44,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 18:10:44,313 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:10:44,313 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:10:44,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:10:44,527 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:10:44,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:10:44,529 INFO L82 PathProgramCache]: Analyzing trace with hash 678815956, now seen corresponding path program 2 times [2021-01-06 18:10:44,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:10:44,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764661018] [2021-01-06 18:10:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:10:44,557 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:10:44,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877236475] [2021-01-06 18:10:44,558 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 18:10:44,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 18:10:44,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:10:44,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 18:10:44,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:10:44,849 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 18:10:44,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764661018] [2021-01-06 18:10:44,850 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:10:44,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877236475] [2021-01-06 18:10:44,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:10:44,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 18:10:44,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064914919] [2021-01-06 18:10:44,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 18:10:44,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:10:44,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 18:10:44,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 18:10:44,857 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2021-01-06 18:10:45,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:10:45,008 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-01-06 18:10:45,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 18:10:45,009 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2021-01-06 18:10:45,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:10:45,013 INFO L225 Difference]: With dead ends: 45 [2021-01-06 18:10:45,013 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 18:10:45,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 18:10:45,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 18:10:45,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2021-01-06 18:10:45,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 18:10:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-01-06 18:10:45,029 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 15 [2021-01-06 18:10:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:10:45,030 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-01-06 18:10:45,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 18:10:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-01-06 18:10:45,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 18:10:45,032 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:10:45,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:10:45,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:10:45,237 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:10:45,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:10:45,238 INFO L82 PathProgramCache]: Analyzing trace with hash -531865812, now seen corresponding path program 1 times [2021-01-06 18:10:45,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:10:45,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653913059] [2021-01-06 18:10:45,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:10:45,264 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:10:45,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256862208] [2021-01-06 18:10:45,264 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 18:10:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:10:45,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 18:10:45,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:10:45,452 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 18:10:45,470 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 18:10:45,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653913059] [2021-01-06 18:10:45,471 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:10:45,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256862208] [2021-01-06 18:10:45,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:10:45,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 18:10:45,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700449823] [2021-01-06 18:10:45,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 18:10:45,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:10:45,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 18:10:45,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 18:10:45,474 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2021-01-06 18:10:45,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:10:45,723 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-01-06 18:10:45,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 18:10:45,724 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2021-01-06 18:10:45,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:10:45,725 INFO L225 Difference]: With dead ends: 36 [2021-01-06 18:10:45,725 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 18:10:45,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-01-06 18:10:45,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 18:10:45,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 18:10:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 18:10:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-01-06 18:10:45,732 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 17 [2021-01-06 18:10:45,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:10:45,733 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-01-06 18:10:45,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 18:10:45,733 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-01-06 18:10:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 18:10:45,734 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:10:45,734 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:10:45,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:10:45,949 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:10:45,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:10:45,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1905056066, now seen corresponding path program 3 times [2021-01-06 18:10:45,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:10:45,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935980378] [2021-01-06 18:10:45,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:10:45,965 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:10:45,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283479769] [2021-01-06 18:10:45,966 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