/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/bresenham-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:16:22,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:16:22,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:16:22,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:16:22,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:16:22,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:16:22,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:16:22,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:16:22,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:16:22,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:16:22,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:16:22,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:16:22,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:16:22,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:16:22,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:16:22,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:16:22,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:16:22,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:16:22,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:16:22,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:16:22,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:16:22,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:16:22,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:16:22,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:16:22,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:16:22,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:16:22,201 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:16:22,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:16:22,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:16:22,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:16:22,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:16:22,207 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:16:22,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:16:22,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:16:22,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:16:22,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:16:22,218 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 17:16:22,270 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:16:22,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:16:22,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:16:22,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:16:22,276 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:16:22,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:16:22,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:16:22,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:16:22,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:16:22,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:16:22,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:16:22,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:16:22,288 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:16:22,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:16:22,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:16:22,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:16:22,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:16:22,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:16:22,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:16:22,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:16:22,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:16:22,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:16:22,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:16:22,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:16:22,291 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:16:22,291 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:16:22,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:16:22,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:16:22,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:16:22,700 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:16:22,701 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:16:22,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound100.c [2021-01-06 17:16:22,789 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/888def93b/2415bd48bad349ee997048f5ec21efc7/FLAG456ee480f [2021-01-06 17:16:23,543 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:16:23,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound100.c [2021-01-06 17:16:23,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/888def93b/2415bd48bad349ee997048f5ec21efc7/FLAG456ee480f [2021-01-06 17:16:23,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/888def93b/2415bd48bad349ee997048f5ec21efc7 [2021-01-06 17:16:23,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:16:23,928 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:16:23,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:16:23,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:16:23,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:16:23,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:16:23" (1/1) ... [2021-01-06 17:16:23,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe04eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:23, skipping insertion in model container [2021-01-06 17:16:23,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:16:23" (1/1) ... [2021-01-06 17:16:23,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:16:23,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:16:24,224 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/bresenham-ll_valuebound100.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 17:16:24,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:16:24,279 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:16:24,296 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/bresenham-ll_valuebound100.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 17:16:24,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:16:24,349 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:16:24,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:24 WrapperNode [2021-01-06 17:16:24,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:16:24,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:16:24,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:16:24,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:16:24,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:24" (1/1) ... [2021-01-06 17:16:24,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:24" (1/1) ... [2021-01-06 17:16:24,403 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:16:24,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:16:24,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:16:24,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:16:24,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:24" (1/1) ... [2021-01-06 17:16:24,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:24" (1/1) ... [2021-01-06 17:16:24,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:24" (1/1) ... [2021-01-06 17:16:24,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:24" (1/1) ... [2021-01-06 17:16:24,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:24" (1/1) ... [2021-01-06 17:16:24,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:24" (1/1) ... [2021-01-06 17:16:24,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:24" (1/1) ... [2021-01-06 17:16:24,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:16:24,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:16:24,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:16:24,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:16:24,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:24" (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 17:16:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:16:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:16:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:16:24,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:16:24,938 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:16:24,938 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 17:16:24,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:16:24 BoogieIcfgContainer [2021-01-06 17:16:24,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:16:24,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:16:24,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:16:24,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:16:24,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:16:23" (1/3) ... [2021-01-06 17:16:24,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ffa31e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:16:24, skipping insertion in model container [2021-01-06 17:16:24,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:24" (2/3) ... [2021-01-06 17:16:24,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ffa31e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:16:24, skipping insertion in model container [2021-01-06 17:16:24,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:16:24" (3/3) ... [2021-01-06 17:16:24,949 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound100.c [2021-01-06 17:16:24,956 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:16:24,963 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:16:24,999 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:16:25,057 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:16:25,057 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:16:25,057 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:16:25,057 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:16:25,057 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:16:25,058 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:16:25,058 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:16:25,058 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:16:25,076 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 17:16:25,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:16:25,085 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:25,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:25,087 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:25,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:25,109 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2021-01-06 17:16:25,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:25,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500529639] [2021-01-06 17:16:25,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:25,306 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 17:16:25,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500529639] [2021-01-06 17:16:25,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:16:25,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:16:25,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985352479] [2021-01-06 17:16:25,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:16:25,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:25,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:16:25,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:16:25,332 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 17:16:25,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:25,350 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-01-06 17:16:25,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:16:25,352 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 17:16:25,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:25,361 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:16:25,361 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 17:16:25,364 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 17:16:25,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 17:16:25,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 17:16:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:16:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 17:16:25,401 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-01-06 17:16:25,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:25,401 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 17:16:25,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:16:25,402 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 17:16:25,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:16:25,402 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:25,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:25,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:16:25,403 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:25,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:25,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2021-01-06 17:16:25,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:25,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949551853] [2021-01-06 17:16:25,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:25,429 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:25,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442013006] [2021-01-06 17:16:25,430 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 17:16:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:25,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:16:25,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:25,697 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 17:16:25,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949551853] [2021-01-06 17:16:25,698 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:25,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442013006] [2021-01-06 17:16:25,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:16:25,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:16:25,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932082795] [2021-01-06 17:16:25,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:16:25,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:25,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:16:25,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:16:25,702 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2021-01-06 17:16:25,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:25,819 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-01-06 17:16:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:16:25,820 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2021-01-06 17:16:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:25,821 INFO L225 Difference]: With dead ends: 29 [2021-01-06 17:16:25,821 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 17:16:25,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:16:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 17:16:25,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-01-06 17:16:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:16:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-01-06 17:16:25,828 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 9 [2021-01-06 17:16:25,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:25,828 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-01-06 17:16:25,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:16:25,829 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-01-06 17:16:25,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:16:25,829 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:25,829 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:26,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:16:26,041 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:26,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:26,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2039286562, now seen corresponding path program 1 times [2021-01-06 17:16:26,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:26,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580817450] [2021-01-06 17:16:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:26,076 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:26,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849014456] [2021-01-06 17:16:26,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:26,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:16:26,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:26,283 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 17:16:26,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580817450] [2021-01-06 17:16:26,284 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:26,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849014456] [2021-01-06 17:16:26,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:26,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:16:26,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312188087] [2021-01-06 17:16:26,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:16:26,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:26,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:16:26,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:16:26,287 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2021-01-06 17:16:26,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:26,533 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-01-06 17:16:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:16:26,534 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2021-01-06 17:16:26,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:26,535 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:16:26,535 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:16:26,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:16:26,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:16:26,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-01-06 17:16:26,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:16:26,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-01-06 17:16:26,543 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2021-01-06 17:16:26,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:26,544 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-01-06 17:16:26,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:16:26,544 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-01-06 17:16:26,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:16:26,545 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:26,545 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:26,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:26,760 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:26,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:26,762 INFO L82 PathProgramCache]: Analyzing trace with hash -2037439520, now seen corresponding path program 1 times [2021-01-06 17:16:26,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:26,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594476307] [2021-01-06 17:16:26,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:26,790 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:26,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929704947] [2021-01-06 17:16:26,791 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 17:16:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:26,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 17:16:26,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:27,033 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 17:16:27,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594476307] [2021-01-06 17:16:27,034 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:27,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929704947] [2021-01-06 17:16:27,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:27,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:16:27,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621924279] [2021-01-06 17:16:27,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:16:27,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:27,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:16:27,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:16:27,041 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2021-01-06 17:16:27,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:27,250 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-01-06 17:16:27,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:16:27,253 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2021-01-06 17:16:27,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:27,255 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:16:27,255 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:16:27,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:16:27,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:16:27,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2021-01-06 17:16:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:16:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 17:16:27,268 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2021-01-06 17:16:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:27,270 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 17:16:27,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:16:27,270 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 17:16:27,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:16:27,271 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:27,271 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:27,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:27,487 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:27,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:27,488 INFO L82 PathProgramCache]: Analyzing trace with hash -878006574, now seen corresponding path program 1 times [2021-01-06 17:16:27,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:27,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855314863] [2021-01-06 17:16:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:27,503 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:27,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923029002] [2021-01-06 17:16:27,504 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 17:16:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:27,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 17:16:27,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:27,778 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:16:27,803 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 17:16:27,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855314863] [2021-01-06 17:16:27,803 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:27,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923029002] [2021-01-06 17:16:27,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:27,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:16:27,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300505357] [2021-01-06 17:16:27,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:16:27,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:27,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:16:27,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:16:27,806 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 11 states. [2021-01-06 17:16:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:28,121 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-01-06 17:16:28,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:16:28,122 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2021-01-06 17:16:28,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:28,123 INFO L225 Difference]: With dead ends: 37 [2021-01-06 17:16:28,123 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 17:16:28,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:16:28,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 17:16:28,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-01-06 17:16:28,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:16:28,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-01-06 17:16:28,130 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2021-01-06 17:16:28,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:28,130 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-01-06 17:16:28,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:16:28,130 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-01-06 17:16:28,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:16:28,131 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:28,131 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:28,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:28,346 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:28,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:28,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1508067884, now seen corresponding path program 2 times [2021-01-06 17:16:28,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:28,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486593087] [2021-01-06 17:16:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:28,369 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:28,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580604733] [2021-01-06 17:16:28,371 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 17:16:28,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:16:28,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:28,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 17:16:28,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:28,626 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 17:16:28,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486593087] [2021-01-06 17:16:28,627 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:28,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580604733] [2021-01-06 17:16:28,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:28,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:16:28,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741845410] [2021-01-06 17:16:28,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:16:28,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:28,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:16:28,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:16:28,629 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2021-01-06 17:16:28,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:28,900 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-01-06 17:16:28,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:16:28,900 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2021-01-06 17:16:28,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:28,901 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:16:28,901 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 17:16:28,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 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 17:16:28,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 17:16:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-01-06 17:16:28,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:16:28,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-01-06 17:16:28,909 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2021-01-06 17:16:28,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:28,910 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-01-06 17:16:28,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:16:28,910 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-01-06 17:16:28,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:16:28,911 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:28,911 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:29,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:16:29,125 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:29,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:29,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1506220842, now seen corresponding path program 1 times [2021-01-06 17:16:29,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:29,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705671880] [2021-01-06 17:16:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:29,142 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:29,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118367882] [2021-01-06 17:16:29,143 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 17:16:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:29,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 17:16:29,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:29,419 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 17:16:29,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705671880] [2021-01-06 17:16:29,420 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:29,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118367882] [2021-01-06 17:16:29,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:29,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:16:29,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703066918] [2021-01-06 17:16:29,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:16:29,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:29,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:16:29,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:16:29,422 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 11 states. [2021-01-06 17:16:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:29,717 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-01-06 17:16:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:16:29,718 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2021-01-06 17:16:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:29,723 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:16:29,723 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 17:16:29,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:16:29,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 17:16:29,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2021-01-06 17:16:29,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:16:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-01-06 17:16:29,743 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 19 [2021-01-06 17:16:29,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:29,743 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-01-06 17:16:29,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:16:29,744 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-01-06 17:16:29,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:16:29,745 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:29,745 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:29,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:29,961 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:29,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:29,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1901094894, now seen corresponding path program 2 times [2021-01-06 17:16:29,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:29,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331042594] [2021-01-06 17:16:29,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:29,977 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:29,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910050227] [2021-01-06 17:16:29,977 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 17:16:30,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:16:30,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:30,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 17:16:30,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:16:30,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331042594] [2021-01-06 17:16:30,138 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:30,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910050227] [2021-01-06 17:16:30,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:30,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:16:30,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90743669] [2021-01-06 17:16:30,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:16:30,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:30,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:16:30,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:16:30,141 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 7 states. [2021-01-06 17:16:34,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:34,323 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-01-06 17:16:34,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:16:34,326 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2021-01-06 17:16:34,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:34,326 INFO L225 Difference]: With dead ends: 41 [2021-01-06 17:16:34,326 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 17:16:34,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:16:34,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 17:16:34,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2021-01-06 17:16:34,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:16:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-01-06 17:16:34,359 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 19 [2021-01-06 17:16:34,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:34,360 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-01-06 17:16:34,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:16:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-01-06 17:16:34,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:16:34,360 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:34,361 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:34,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:34,575 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:34,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:34,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1899247852, now seen corresponding path program 2 times [2021-01-06 17:16:34,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:34,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252912436] [2021-01-06 17:16:34,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:34,588 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:34,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918301147] [2021-01-06 17:16:34,589 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 17:16:34,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:16:34,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:34,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:16:34,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:34,857 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 17:16:34,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252912436] [2021-01-06 17:16:34,857 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:34,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918301147] [2021-01-06 17:16:34,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:34,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:16:34,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353378980] [2021-01-06 17:16:34,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:16:34,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:34,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:16:34,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:16:34,867 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2021-01-06 17:16:35,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:35,122 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-01-06 17:16:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:16:35,123 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2021-01-06 17:16:35,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:35,126 INFO L225 Difference]: With dead ends: 53 [2021-01-06 17:16:35,126 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 17:16:35,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:16:35,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 17:16:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-01-06 17:16:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:16:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-01-06 17:16:35,147 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 19 [2021-01-06 17:16:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:35,149 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-01-06 17:16:35,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:16:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-01-06 17:16:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:16:35,151 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:35,151 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:35,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:16:35,361 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:35,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:35,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1998111260, now seen corresponding path program 1 times [2021-01-06 17:16:35,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:35,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736678828] [2021-01-06 17:16:35,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:35,374 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:35,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331727428] [2021-01-06 17:16:35,375 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 17:16:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:35,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:16:35,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:35,566 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 17:16:35,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736678828] [2021-01-06 17:16:35,566 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:35,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331727428] [2021-01-06 17:16:35,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:35,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:16:35,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613271483] [2021-01-06 17:16:35,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:16:35,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:35,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:16:35,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:16:35,568 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2021-01-06 17:16:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:35,676 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-01-06 17:16:35,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:16:35,677 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2021-01-06 17:16:35,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:35,678 INFO L225 Difference]: With dead ends: 49 [2021-01-06 17:16:35,678 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 17:16:35,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 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 17:16:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 17:16:35,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-01-06 17:16:35,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:16:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-01-06 17:16:35,710 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2021-01-06 17:16:35,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:35,710 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-01-06 17:16:35,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:16:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-01-06 17:16:35,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:16:35,718 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:35,718 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:35,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:35,933 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:35,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:35,934 INFO L82 PathProgramCache]: Analyzing trace with hash -2074315424, now seen corresponding path program 2 times [2021-01-06 17:16:35,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:35,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21046354] [2021-01-06 17:16:35,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:35,963 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:35,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093738594] [2021-01-06 17:16:35,964 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 [2021-01-06 17:16:36,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:16:36,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:36,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:16:36,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:36,273 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 17:16:36,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21046354] [2021-01-06 17:16:36,274 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:36,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093738594] [2021-01-06 17:16:36,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:36,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:16:36,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059561124] [2021-01-06 17:16:36,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:16:36,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:36,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:16:36,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:16:36,280 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2021-01-06 17:16:36,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:36,419 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-01-06 17:16:36,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:16:36,420 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2021-01-06 17:16:36,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:36,423 INFO L225 Difference]: With dead ends: 49 [2021-01-06 17:16:36,424 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 17:16:36,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 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 17:16:36,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 17:16:36,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-01-06 17:16:36,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:16:36,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-01-06 17:16:36,445 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2021-01-06 17:16:36,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:36,446 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-01-06 17:16:36,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:16:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-01-06 17:16:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:16:36,447 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:36,451 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:36,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:36,667 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:36,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:36,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1411305246, now seen corresponding path program 2 times [2021-01-06 17:16:36,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:36,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004601335] [2021-01-06 17:16:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:36,689 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:36,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946795312] [2021-01-06 17:16:36,691 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:36,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:16:36,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:36,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 17:16:36,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:37,159 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:16:37,178 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 17:16:37,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004601335] [2021-01-06 17:16:37,179 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:37,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946795312] [2021-01-06 17:16:37,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:37,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-01-06 17:16:37,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432183570] [2021-01-06 17:16:37,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 17:16:37,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:37,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 17:16:37,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:16:37,181 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2021-01-06 17:16:37,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:37,533 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-01-06 17:16:37,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:16:37,534 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2021-01-06 17:16:37,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:37,534 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:16:37,534 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:16:37,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:16:37,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:16:37,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-01-06 17:16:37,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:16:37,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-01-06 17:16:37,542 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 22 [2021-01-06 17:16:37,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:37,542 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-01-06 17:16:37,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:16:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-01-06 17:16:37,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 17:16:37,543 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:37,543 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:37,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:16:37,758 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:37,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:37,759 INFO L82 PathProgramCache]: Analyzing trace with hash 779046304, now seen corresponding path program 3 times [2021-01-06 17:16:37,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:37,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387876856] [2021-01-06 17:16:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:37,770 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:37,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127965061] [2021-01-06 17:16:37,771 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:37,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:16:37,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:37,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 17:16:37,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 17:16:38,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387876856] [2021-01-06 17:16:38,014 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:38,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127965061] [2021-01-06 17:16:38,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:38,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:16:38,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897811931] [2021-01-06 17:16:38,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:16:38,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:38,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:16:38,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:16:38,017 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2021-01-06 17:16:38,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:38,292 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-01-06 17:16:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:16:38,293 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2021-01-06 17:16:38,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:38,294 INFO L225 Difference]: With dead ends: 71 [2021-01-06 17:16:38,294 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 17:16:38,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:16:38,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 17:16:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2021-01-06 17:16:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 17:16:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-01-06 17:16:38,304 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 24 [2021-01-06 17:16:38,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:38,305 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-01-06 17:16:38,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:16:38,305 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-01-06 17:16:38,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 17:16:38,305 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:38,305 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:38,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 17:16:38,519 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:38,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:38,520 INFO L82 PathProgramCache]: Analyzing trace with hash 386019294, now seen corresponding path program 4 times [2021-01-06 17:16:38,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:38,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865280037] [2021-01-06 17:16:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:38,530 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:38,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916566933] [2021-01-06 17:16:38,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:38,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:16:38,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:38,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:16:38,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:38,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865280037] [2021-01-06 17:16:38,647 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:38,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916566933] [2021-01-06 17:16:38,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:38,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 17:16:38,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171576250] [2021-01-06 17:16:38,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:16:38,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:38,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:16:38,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:16:38,653 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 5 states. [2021-01-06 17:16:38,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:38,729 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2021-01-06 17:16:38,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:16:38,729 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2021-01-06 17:16:38,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:38,730 INFO L225 Difference]: With dead ends: 84 [2021-01-06 17:16:38,730 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 17:16:38,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:16:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 17:16:38,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2021-01-06 17:16:38,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 17:16:38,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2021-01-06 17:16:38,744 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 24 [2021-01-06 17:16:38,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:38,745 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2021-01-06 17:16:38,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:16:38,745 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2021-01-06 17:16:38,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 17:16:38,745 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:38,746 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:38,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:16:38,959 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:38,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:38,960 INFO L82 PathProgramCache]: Analyzing trace with hash -500817374, now seen corresponding path program 5 times [2021-01-06 17:16:38,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:38,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064198784] [2021-01-06 17:16:38,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:38,970 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:38,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391128773] [2021-01-06 17:16:38,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:39,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 17:16:39,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:39,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 17:16:39,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:39,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064198784] [2021-01-06 17:16:39,204 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:39,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391128773] [2021-01-06 17:16:39,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:39,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:16:39,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807376657] [2021-01-06 17:16:39,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:16:39,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:39,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:16:39,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:16:39,208 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 10 states. [2021-01-06 17:16:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:39,552 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2021-01-06 17:16:39,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:16:39,553 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2021-01-06 17:16:39,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:39,553 INFO L225 Difference]: With dead ends: 80 [2021-01-06 17:16:39,553 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 17:16:39,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:16:39,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 17:16:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2021-01-06 17:16:39,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 17:16:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-01-06 17:16:39,567 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 24 [2021-01-06 17:16:39,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:39,568 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-01-06 17:16:39,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:16:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-01-06 17:16:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 17:16:39,568 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:39,568 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:39,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:39,782 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:39,783 INFO L82 PathProgramCache]: Analyzing trace with hash -893844384, now seen corresponding path program 3 times [2021-01-06 17:16:39,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:39,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464964158] [2021-01-06 17:16:39,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:39,793 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:39,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522881710] [2021-01-06 17:16:39,794 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true