/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/bresenham-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:11:17,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:11:17,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:11:17,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:11:17,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:11:17,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:11:17,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:11:17,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:11:17,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:11:17,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:11:17,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:11:17,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:11:17,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:11:17,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:11:17,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:11:17,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:11:17,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:11:17,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:11:17,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:11:17,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:11:17,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:11:17,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:11:17,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:11:17,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:11:17,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:11:17,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:11:17,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:11:17,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:11:17,326 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 17:11:17,364 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:11:17,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:11:17,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:11:17,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:11:17,367 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:11:17,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:11:17,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:11:17,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:11:17,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:11:17,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:11:17,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:11:17,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:11:17,371 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:11:17,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:11:17,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:11:17,372 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:11:17,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:11:17,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:11:17,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:11:17,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:11:17,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:11:17,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:11:17,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:11:17,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:11:17,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:11:17,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:11:17,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:11:17,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:11:17,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:11:17,812 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:11:17,813 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:11:17,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/bresenham-ll.c [2021-01-06 17:11:17,914 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/31554120a/dd254898b694444cb7357f1ed41670a1/FLAG68f93bfac [2021-01-06 17:11:18,552 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:11:18,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/bresenham-ll.c [2021-01-06 17:11:18,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/31554120a/dd254898b694444cb7357f1ed41670a1/FLAG68f93bfac [2021-01-06 17:11:18,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/31554120a/dd254898b694444cb7357f1ed41670a1 [2021-01-06 17:11:18,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:11:18,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:11:18,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:11:18,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:11:18,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:11:18,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:11:18" (1/1) ... [2021-01-06 17:11:18,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d706667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:18, skipping insertion in model container [2021-01-06 17:11:18,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:11:18" (1/1) ... [2021-01-06 17:11:18,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:11:18,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:11:19,077 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/bresenham-ll.c[597,610] left hand side expression in assignment: lhs: VariableLHS[~X~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~v~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[~yx~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] [2021-01-06 17:11:19,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:11:19,120 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:11:19,142 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/bresenham-ll.c[597,610] left hand side expression in assignment: lhs: VariableLHS[~X~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~v~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[~yx~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] [2021-01-06 17:11:19,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:11:19,199 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:11:19,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:19 WrapperNode [2021-01-06 17:11:19,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:11:19,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:11:19,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:11:19,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:11:19,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:19" (1/1) ... [2021-01-06 17:11:19,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:19" (1/1) ... [2021-01-06 17:11:19,266 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:11:19,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:11:19,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:11:19,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:11:19,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:19" (1/1) ... [2021-01-06 17:11:19,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:19" (1/1) ... [2021-01-06 17:11:19,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:19" (1/1) ... [2021-01-06 17:11:19,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:19" (1/1) ... [2021-01-06 17:11:19,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:19" (1/1) ... [2021-01-06 17:11:19,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:19" (1/1) ... [2021-01-06 17:11:19,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:19" (1/1) ... [2021-01-06 17:11:19,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:11:19,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:11:19,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:11:19,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:11:19,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:19" (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 17:11:19,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:11:19,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:11:19,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:11:19,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:11:19,756 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:11:19,757 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 17:11:19,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:11:19 BoogieIcfgContainer [2021-01-06 17:11:19,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:11:19,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:11:19,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:11:19,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:11:19,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:11:18" (1/3) ... [2021-01-06 17:11:19,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb5880b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:11:19, skipping insertion in model container [2021-01-06 17:11:19,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:19" (2/3) ... [2021-01-06 17:11:19,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb5880b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:11:19, skipping insertion in model container [2021-01-06 17:11:19,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:11:19" (3/3) ... [2021-01-06 17:11:19,808 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll.c [2021-01-06 17:11:19,815 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:11:19,825 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:11:19,861 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:11:19,906 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:11:19,906 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:11:19,906 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:11:19,907 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:11:19,907 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:11:19,907 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:11:19,907 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:11:19,907 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:11:19,928 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-01-06 17:11:19,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-01-06 17:11:19,937 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:19,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-01-06 17:11:19,940 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:19,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:19,949 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2021-01-06 17:11:19,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:19,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252525881] [2021-01-06 17:11:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:20,122 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:11:20,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635124972] [2021-01-06 17:11:20,124 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 17:11:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:20,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 17:11:20,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:20,403 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 17:11:20,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252525881] [2021-01-06 17:11:20,404 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:11:20,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635124972] [2021-01-06 17:11:20,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:11:20,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 17:11:20,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62089494] [2021-01-06 17:11:20,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:11:20,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:20,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:11:20,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:11:20,430 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 4 states. [2021-01-06 17:11:20,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:20,505 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2021-01-06 17:11:20,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:11:20,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2021-01-06 17:11:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:20,518 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:11:20,519 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 17:11:20,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:11:20,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 17:11:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2021-01-06 17:11:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 17:11:20,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-01-06 17:11:20,554 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 5 [2021-01-06 17:11:20,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:20,554 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-01-06 17:11:20,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:11:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-01-06 17:11:20,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:11:20,555 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:20,556 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:20,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-01-06 17:11:20,771 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:20,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:20,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1328986426, now seen corresponding path program 1 times [2021-01-06 17:11:20,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:20,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708755446] [2021-01-06 17:11:20,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:20,794 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:11:20,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697467561] [2021-01-06 17:11:20,794 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 17:11:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:20,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:11:20,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:21,022 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 17:11:21,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708755446] [2021-01-06 17:11:21,023 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:11:21,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697467561] [2021-01-06 17:11:21,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:11:21,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:11:21,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615431053] [2021-01-06 17:11:21,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:11:21,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:21,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:11:21,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:11:21,028 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 7 states. [2021-01-06 17:11:21,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:21,232 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-01-06 17:11:21,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:11:21,235 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2021-01-06 17:11:21,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:21,237 INFO L225 Difference]: With dead ends: 30 [2021-01-06 17:11:21,237 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 17:11:21,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:11:21,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 17:11:21,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2021-01-06 17:11:21,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:11:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-01-06 17:11:21,253 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2021-01-06 17:11:21,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:21,253 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-01-06 17:11:21,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:11:21,254 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-01-06 17:11:21,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:11:21,255 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:21,255 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:21,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:21,471 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:21,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1330833468, now seen corresponding path program 1 times [2021-01-06 17:11:21,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:21,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131937515] [2021-01-06 17:11:21,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:21,490 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:11:21,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047110717] [2021-01-06 17:11:21,491 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 17:11:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:21,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 17:11:21,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:21,672 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 17:11:21,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131937515] [2021-01-06 17:11:21,673 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:11:21,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047110717] [2021-01-06 17:11:21,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:11:21,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:11:21,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518975522] [2021-01-06 17:11:21,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:11:21,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:21,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:11:21,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:11:21,676 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2021-01-06 17:11:21,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:21,791 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-01-06 17:11:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:11:21,791 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2021-01-06 17:11:21,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:21,793 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:11:21,793 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 17:11:21,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:11:21,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 17:11:21,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-01-06 17:11:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 17:11:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-01-06 17:11:21,800 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2021-01-06 17:11:21,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:21,800 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-01-06 17:11:21,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:11:21,800 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-01-06 17:11:21,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:11:21,801 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:21,801 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:22,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:22,015 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:22,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:22,016 INFO L82 PathProgramCache]: Analyzing trace with hash 21628584, now seen corresponding path program 1 times [2021-01-06 17:11:22,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:22,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615182790] [2021-01-06 17:11:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:22,031 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:11:22,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595143194] [2021-01-06 17:11:22,032 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 17:11:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:22,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 17:11:22,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:22,289 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:11:22,309 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 17:11:22,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615182790] [2021-01-06 17:11:22,310 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:11:22,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595143194] [2021-01-06 17:11:22,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:11:22,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:11:22,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788901471] [2021-01-06 17:11:22,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:11:22,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:22,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:11:22,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:11:22,313 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 11 states. [2021-01-06 17:11:22,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:22,571 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-01-06 17:11:22,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:11:22,571 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2021-01-06 17:11:22,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:22,572 INFO L225 Difference]: With dead ends: 33 [2021-01-06 17:11:22,572 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 17:11:22,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:11:22,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 17:11:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2021-01-06 17:11:22,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:11:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-01-06 17:11:22,579 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2021-01-06 17:11:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:22,579 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-01-06 17:11:22,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:11:22,580 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-01-06 17:11:22,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:11:22,580 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:22,581 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-01-06 17:11:22,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:22,796 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:22,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:22,798 INFO L82 PathProgramCache]: Analyzing trace with hash -247107990, now seen corresponding path program 2 times [2021-01-06 17:11:22,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:22,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246149985] [2021-01-06 17:11:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:22,812 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:11:22,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315547469] [2021-01-06 17:11:22,813 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 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 17:11:22,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:11:22,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:11:22,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 17:11:22,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:11:23,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246149985] [2021-01-06 17:11:23,122 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:11:23,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315547469] [2021-01-06 17:11:23,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:11:23,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:11:23,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913285029] [2021-01-06 17:11:23,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:11:23,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:23,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:11:23,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:11:23,125 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 10 states. [2021-01-06 17:11:23,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:23,349 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-01-06 17:11:23,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:11:23,350 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2021-01-06 17:11:23,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:23,351 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:11:23,351 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 17:11:23,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:11:23,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 17:11:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2021-01-06 17:11:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 17:11:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-01-06 17:11:23,358 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 15 [2021-01-06 17:11:23,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:23,358 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-01-06 17:11:23,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:11:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-01-06 17:11:23,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:11:23,359 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:23,359 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:23,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:23,565 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:23,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:23,566 INFO L82 PathProgramCache]: Analyzing trace with hash -245260948, now seen corresponding path program 1 times [2021-01-06 17:11:23,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:23,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861159606] [2021-01-06 17:11:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:23,580 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:11:23,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382493706] [2021-01-06 17:11:23,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:23,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 17:11:23,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:11:23,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861159606] [2021-01-06 17:11:23,824 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:11:23,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382493706] [2021-01-06 17:11:23,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:11:23,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:11:23,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787041327] [2021-01-06 17:11:23,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:11:23,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:23,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:11:23,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:11:23,840 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 9 states. [2021-01-06 17:11:24,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:24,057 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-01-06 17:11:24,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:11:24,058 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2021-01-06 17:11:24,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:24,059 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:11:24,059 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 17:11:24,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:11:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 17:11:24,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-01-06 17:11:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:11:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-01-06 17:11:24,066 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 15 [2021-01-06 17:11:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:24,066 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-01-06 17:11:24,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:11:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-01-06 17:11:24,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:11:24,067 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:24,067 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:24,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:24,282 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:24,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:24,284 INFO L82 PathProgramCache]: Analyzing trace with hash -640135000, now seen corresponding path program 2 times [2021-01-06 17:11:24,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:24,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217271165] [2021-01-06 17:11:24,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:24,297 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:11:24,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269861406] [2021-01-06 17:11:24,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:24,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:11:24,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:11:24,366 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 17:11:24,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:11:24,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217271165] [2021-01-06 17:11:24,699 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:11:24,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269861406] [2021-01-06 17:11:24,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:11:24,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 17:11:24,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770791815] [2021-01-06 17:11:24,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:11:24,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:24,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:11:24,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:11:24,702 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 13 states. [2021-01-06 17:11:25,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:25,125 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2021-01-06 17:11:25,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:11:25,125 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2021-01-06 17:11:25,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:25,126 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:11:25,126 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 17:11:25,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:11:25,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 17:11:25,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-01-06 17:11:25,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 17:11:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-01-06 17:11:25,135 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 15 [2021-01-06 17:11:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:25,136 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-01-06 17:11:25,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:11:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-01-06 17:11:25,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:11:25,137 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:25,137 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-01-06 17:11:25,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:25,352 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:25,353 INFO L82 PathProgramCache]: Analyzing trace with hash -638287958, now seen corresponding path program 2 times [2021-01-06 17:11:25,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:25,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263343961] [2021-01-06 17:11:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:25,365 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:11:25,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456053888] [2021-01-06 17:11:25,366 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:25,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:11:25,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:11:25,429 WARN L261 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 17:11:25,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:11:25,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263343961] [2021-01-06 17:11:25,662 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:11:25,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456053888] [2021-01-06 17:11:25,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:11:25,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:11:25,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081476066] [2021-01-06 17:11:25,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:11:25,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:25,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:11:25,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:11:25,665 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 11 states. [2021-01-06 17:11:25,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:25,907 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-01-06 17:11:25,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:11:25,908 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2021-01-06 17:11:25,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:25,910 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:11:25,910 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:11:25,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:11:25,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:11:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2021-01-06 17:11:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 17:11:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-01-06 17:11:25,920 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 15 [2021-01-06 17:11:25,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:25,920 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-01-06 17:11:25,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:11:25,920 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-01-06 17:11:25,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:11:25,921 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:25,921 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:26,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-06 17:11:26,137 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:26,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:26,138 INFO L82 PathProgramCache]: Analyzing trace with hash -602097988, now seen corresponding path program 1 times [2021-01-06 17:11:26,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:26,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093801270] [2021-01-06 17:11:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:26,151 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:11:26,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389321296] [2021-01-06 17:11:26,151 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:26,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 17:11:26,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:11:26,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093801270] [2021-01-06 17:11:26,348 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:11:26,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389321296] [2021-01-06 17:11:26,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:11:26,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:11:26,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773677531] [2021-01-06 17:11:26,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:11:26,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:26,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:11:26,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:11:26,351 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 7 states. [2021-01-06 17:11:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:26,473 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-01-06 17:11:26,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:11:26,475 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2021-01-06 17:11:26,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:26,476 INFO L225 Difference]: With dead ends: 49 [2021-01-06 17:11:26,476 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 17:11:26,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:11:26,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 17:11:26,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-01-06 17:11:26,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 17:11:26,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-01-06 17:11:26,485 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 18 [2021-01-06 17:11:26,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:26,485 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-01-06 17:11:26,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:11:26,486 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-01-06 17:11:26,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:11:26,486 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:26,487 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:26,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:26,701 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:26,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1411444614, now seen corresponding path program 2 times [2021-01-06 17:11:26,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:26,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402166856] [2021-01-06 17:11:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:26,714 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:11:26,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058213899] [2021-01-06 17:11:26,714 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true