/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_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 18:04:43,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 18:04:43,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 18:04:43,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 18:04:43,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 18:04:43,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 18:04:43,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 18:04:43,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 18:04:43,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 18:04:43,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 18:04:43,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 18:04:43,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 18:04:43,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 18:04:43,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 18:04:43,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 18:04:43,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 18:04:43,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 18:04:43,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 18:04:43,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 18:04:43,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 18:04:43,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 18:04:43,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 18:04:43,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 18:04:43,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 18:04:43,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 18:04:43,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 18:04:43,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 18:04:43,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 18:04:43,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 18:04:43,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 18:04:43,552 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 18:04:43,553 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 18:04:43,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 18:04:43,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 18:04:43,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 18:04:43,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 18:04:43,556 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 18:04:43,584 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 18:04:43,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 18:04:43,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 18:04:43,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 18:04:43,586 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 18:04:43,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 18:04:43,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 18:04:43,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 18:04:43,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 18:04:43,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 18:04:43,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 18:04:43,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 18:04:43,588 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 18:04:43,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 18:04:43,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 18:04:43,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 18:04:43,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 18:04:43,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 18:04:43,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 18:04:43,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 18:04:43,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 18:04:43,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 18:04:43,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 18:04:43,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 18:04:43,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 18:04:43,591 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 18:04:43,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 18:04:44,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 18:04:44,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 18:04:44,035 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 18:04:44,035 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 18:04:44,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.c [2021-01-06 18:04:44,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/99f09b59f/6e59981a97f840e5bef974cde2090510/FLAG9aa4c1e20 [2021-01-06 18:04:44,900 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 18:04:44,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.c [2021-01-06 18:04:44,909 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/99f09b59f/6e59981a97f840e5bef974cde2090510/FLAG9aa4c1e20 [2021-01-06 18:04:45,235 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/99f09b59f/6e59981a97f840e5bef974cde2090510 [2021-01-06 18:04:45,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 18:04:45,241 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 18:04:45,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 18:04:45,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 18:04:45,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 18:04:45,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 06:04:45" (1/1) ... [2021-01-06 18:04:45,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@269a606b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:45, skipping insertion in model container [2021-01-06 18:04:45,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 06:04:45" (1/1) ... [2021-01-06 18:04:45,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 18:04:45,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 18:04:45,436 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_unwindbound20.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 18:04:45,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 18:04:45,480 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 18:04:45,496 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_unwindbound20.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 18:04:45,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 18:04:45,524 INFO L208 MainTranslator]: Completed translation [2021-01-06 18:04:45,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:45 WrapperNode [2021-01-06 18:04:45,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 18:04:45,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 18:04:45,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 18:04:45,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 18:04:45,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:45" (1/1) ... [2021-01-06 18:04:45,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:45" (1/1) ... [2021-01-06 18:04:45,571 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 18:04:45,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 18:04:45,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 18:04:45,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 18:04:45,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:45" (1/1) ... [2021-01-06 18:04:45,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:45" (1/1) ... [2021-01-06 18:04:45,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:45" (1/1) ... [2021-01-06 18:04:45,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:45" (1/1) ... [2021-01-06 18:04:45,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:45" (1/1) ... [2021-01-06 18:04:45,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:45" (1/1) ... [2021-01-06 18:04:45,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:45" (1/1) ... [2021-01-06 18:04:45,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 18:04:45,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 18:04:45,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 18:04:45,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 18:04:45,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:45" (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 18:04:45,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 18:04:45,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 18:04:45,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 18:04:45,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 18:04:46,206 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 18:04:46,206 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 18:04:46,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 06:04:46 BoogieIcfgContainer [2021-01-06 18:04:46,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 18:04:46,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 18:04:46,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 18:04:46,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 18:04:46,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 06:04:45" (1/3) ... [2021-01-06 18:04:46,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c78a724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 06:04:46, skipping insertion in model container [2021-01-06 18:04:46,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 06:04:45" (2/3) ... [2021-01-06 18:04:46,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c78a724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 06:04:46, skipping insertion in model container [2021-01-06 18:04:46,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 06:04:46" (3/3) ... [2021-01-06 18:04:46,220 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound20.c [2021-01-06 18:04:46,229 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 18:04:46,237 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-01-06 18:04:46,263 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 18:04:46,299 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 18:04:46,299 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 18:04:46,300 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 18:04:46,300 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 18:04:46,300 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 18:04:46,300 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 18:04:46,301 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 18:04:46,301 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 18:04:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2021-01-06 18:04:46,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 18:04:46,376 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:04:46,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:04:46,394 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:04:46,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:04:46,412 INFO L82 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2021-01-06 18:04:46,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:04:46,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524105006] [2021-01-06 18:04:46,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:04:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:04:46,604 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 18:04:46,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524105006] [2021-01-06 18:04:46,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:04:46,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 18:04:46,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732673149] [2021-01-06 18:04:46,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 18:04:46,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:04:46,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 18:04:46,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 18:04:46,635 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2021-01-06 18:04:46,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:04:46,656 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-01-06 18:04:46,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 18:04:46,657 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-01-06 18:04:46,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:04:46,668 INFO L225 Difference]: With dead ends: 41 [2021-01-06 18:04:46,668 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 18:04:46,672 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 18:04:46,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 18:04:46,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 18:04:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 18:04:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-01-06 18:04:46,713 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2021-01-06 18:04:46,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:04:46,714 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-01-06 18:04:46,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 18:04:46,714 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-01-06 18:04:46,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 18:04:46,715 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:04:46,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:04:46,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 18:04:46,716 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:04:46,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:04:46,717 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-01-06 18:04:46,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:04:46,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997221468] [2021-01-06 18:04:46,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:04:46,739 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:04:46,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677679503] [2021-01-06 18:04:46,740 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 18:04:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:04:46,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 18:04:46,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:04:46,947 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 18:04:46,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997221468] [2021-01-06 18:04:46,948 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:04:46,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677679503] [2021-01-06 18:04:46,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 18:04:46,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 18:04:46,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743822449] [2021-01-06 18:04:46,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 18:04:46,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:04:46,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 18:04:46,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 18:04:46,953 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2021-01-06 18:04:57,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:04:57,991 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-01-06 18:04:57,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 18:04:57,995 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 18:04:57,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:04:57,996 INFO L225 Difference]: With dead ends: 36 [2021-01-06 18:04:57,996 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 18:04:57,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 18:04:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 18:04:58,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-01-06 18:04:58,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 18:04:58,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-01-06 18:04:58,008 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2021-01-06 18:04:58,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:04:58,008 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-01-06 18:04:58,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 18:04:58,008 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-01-06 18:04:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 18:04:58,010 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:04:58,010 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:04:58,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 18:04:58,223 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:04:58,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:04:58,225 INFO L82 PathProgramCache]: Analyzing trace with hash -938089448, now seen corresponding path program 1 times [2021-01-06 18:04:58,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:04:58,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037644873] [2021-01-06 18:04:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:04:58,256 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:04:58,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121516088] [2021-01-06 18:04:58,257 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 18:04:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:04:58,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 18:04:58,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:04:58,460 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 18:04:58,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037644873] [2021-01-06 18:04:58,461 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:04:58,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121516088] [2021-01-06 18:04:58,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:04:58,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 18:04:58,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991102988] [2021-01-06 18:04:58,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 18:04:58,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:04:58,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 18:04:58,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 18:04:58,464 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2021-01-06 18:04:58,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:04:58,718 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-01-06 18:04:58,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 18:04:58,719 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-01-06 18:04:58,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:04:58,720 INFO L225 Difference]: With dead ends: 39 [2021-01-06 18:04:58,720 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 18:04:58,722 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 18:04:58,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 18:04:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-01-06 18:04:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 18:04:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-01-06 18:04:58,730 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2021-01-06 18:04:58,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:04:58,731 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-01-06 18:04:58,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 18:04:58,731 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-01-06 18:04:58,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 18:04:58,732 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:04:58,732 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:04:58,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:04:58,946 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:04:58,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:04:58,948 INFO L82 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2021-01-06 18:04:58,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:04:58,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78582856] [2021-01-06 18:04:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:04:58,971 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:04:58,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230505105] [2021-01-06 18:04:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:04:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:04:59,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 18:04:59,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:04:59,101 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 18:04:59,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78582856] [2021-01-06 18:04:59,101 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:04:59,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230505105] [2021-01-06 18:04:59,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:04:59,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 18:04:59,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258514215] [2021-01-06 18:04:59,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 18:04:59,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:04:59,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 18:04:59,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 18:04:59,107 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2021-01-06 18:04:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:04:59,150 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-01-06 18:04:59,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 18:04:59,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-01-06 18:04:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:04:59,152 INFO L225 Difference]: With dead ends: 34 [2021-01-06 18:04:59,152 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 18:04:59,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 18:04:59,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 18:04:59,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 18:04:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 18:04:59,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 18:04:59,170 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2021-01-06 18:04:59,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:04:59,172 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 18:04:59,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 18:04:59,172 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 18:04:59,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 18:04:59,173 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:04:59,173 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 18:04:59,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:04:59,374 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:04:59,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:04:59,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1290921348, now seen corresponding path program 2 times [2021-01-06 18:04:59,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:04:59,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019968794] [2021-01-06 18:04:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:04:59,395 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:04:59,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784298316] [2021-01-06 18:04:59,398 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 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 18:04:59,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 18:04:59,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:04:59,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 18:04:59,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:04:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:04:59,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019968794] [2021-01-06 18:04:59,714 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:04:59,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784298316] [2021-01-06 18:04:59,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:04:59,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 18:04:59,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923772706] [2021-01-06 18:04:59,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 18:04:59,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:04:59,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 18:04:59,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-06 18:04:59,718 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2021-01-06 18:05:00,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:05:00,101 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-01-06 18:05:00,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 18:05:00,104 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2021-01-06 18:05:00,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:05:00,105 INFO L225 Difference]: With dead ends: 49 [2021-01-06 18:05:00,106 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 18:05:00,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-01-06 18:05:00,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 18:05:00,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2021-01-06 18:05:00,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 18:05:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-01-06 18:05:00,124 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2021-01-06 18:05:00,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:05:00,126 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-01-06 18:05:00,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 18:05:00,126 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-01-06 18:05:00,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 18:05:00,127 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:05:00,127 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:05:00,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:05:00,343 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:05:00,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:05:00,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1329593552, now seen corresponding path program 1 times [2021-01-06 18:05:00,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:05:00,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942286795] [2021-01-06 18:05:00,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:05:00,364 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:05:00,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987014493] [2021-01-06 18:05:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:05:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 18:05:00,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 18:05:00,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:05:00,653 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 18:05:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:05:00,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942286795] [2021-01-06 18:05:00,674 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:05:00,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987014493] [2021-01-06 18:05:00,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:05:00,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 18:05:00,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434739683] [2021-01-06 18:05:00,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 18:05:00,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:05:00,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 18:05:00,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-01-06 18:05:00,676 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 10 states. [2021-01-06 18:05:01,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:05:01,243 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-01-06 18:05:01,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 18:05:01,244 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2021-01-06 18:05:01,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:05:01,246 INFO L225 Difference]: With dead ends: 39 [2021-01-06 18:05:01,246 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 18:05:01,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-01-06 18:05:01,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 18:05:01,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-01-06 18:05:01,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 18:05:01,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-01-06 18:05:01,269 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 17 [2021-01-06 18:05:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:05:01,270 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-01-06 18:05:01,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 18:05:01,270 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-01-06 18:05:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 18:05:01,272 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:05:01,272 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 18:05:01,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 18:05:01,473 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:05:01,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:05:01,474 INFO L82 PathProgramCache]: Analyzing trace with hash 658932075, now seen corresponding path program 2 times [2021-01-06 18:05:01,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:05:01,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071089689] [2021-01-06 18:05:01,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:05:01,496 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:05:01,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564092435] [2021-01-06 18:05:01,498 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:05:01,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 18:05:01,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 18:05:01,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 18:05:01,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 18:05:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 18:05:01,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071089689] [2021-01-06 18:05:01,637 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 18:05:01,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564092435] [2021-01-06 18:05:01,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 18:05:01,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 18:05:01,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639256303] [2021-01-06 18:05:01,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 18:05:01,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 18:05:01,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 18:05:01,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 18:05:01,639 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 6 states. [2021-01-06 18:05:01,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 18:05:01,688 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-01-06 18:05:01,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 18:05:01,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2021-01-06 18:05:01,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 18:05:01,690 INFO L225 Difference]: With dead ends: 38 [2021-01-06 18:05:01,690 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 18:05:01,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 18:05:01,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 18:05:01,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 18:05:01,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 18:05:01,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-01-06 18:05:01,697 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 19 [2021-01-06 18:05:01,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 18:05:01,697 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-01-06 18:05:01,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 18:05:01,697 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-01-06 18:05:01,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 18:05:01,698 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 18:05:01,698 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 18:05:01,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 18:05:01,913 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 18:05:01,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 18:05:01,914 INFO L82 PathProgramCache]: Analyzing trace with hash 399986928, now seen corresponding path program 3 times [2021-01-06 18:05:01,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 18:05:01,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106966823] [2021-01-06 18:05:01,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 18:05:01,927 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 18:05:01,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435425589] [2021-01-06 18:05:01,927 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true