/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/divbin2_unwindbound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:26:43,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:26:43,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:26:43,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:26:43,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:26:43,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:26:43,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:26:43,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:26:43,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:26:43,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:26:43,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:26:43,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:26:43,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:26:43,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:26:43,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:26:43,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:26:43,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:26:43,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:26:43,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:26:43,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:26:43,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:26:43,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:26:43,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:26:43,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:26:43,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:26:43,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:26:43,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:26:43,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:26:43,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:26:43,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:26:43,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:26:43,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:26:43,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:26:43,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:26:43,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:26:43,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:26:43,637 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 17:26:43,690 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:26:43,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:26:43,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:26:43,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:26:43,693 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:26:43,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:26:43,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:26:43,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:26:43,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:26:43,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:26:43,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:26:43,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:26:43,696 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:26:43,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:26:43,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:26:43,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:26:43,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:26:43,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:26:43,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:26:43,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:26:43,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:26:43,698 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:26:43,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:26:43,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:26:43,698 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:26:43,698 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:26:44,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:26:44,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:26:44,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:26:44,165 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:26:44,170 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:26:44,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2021-01-06 17:26:44,249 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/db77c3e33/a28f9f7a656a495eb22ee2ecab0ba910/FLAGce243555c [2021-01-06 17:26:44,888 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:26:44,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2021-01-06 17:26:44,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/db77c3e33/a28f9f7a656a495eb22ee2ecab0ba910/FLAGce243555c [2021-01-06 17:26:45,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/db77c3e33/a28f9f7a656a495eb22ee2ecab0ba910 [2021-01-06 17:26:45,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:26:45,212 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:26:45,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:26:45,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:26:45,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:26:45,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:26:45" (1/1) ... [2021-01-06 17:26:45,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@159735cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:45, skipping insertion in model container [2021-01-06 17:26:45,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:26:45" (1/1) ... [2021-01-06 17:26:45,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:26:45,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:26:45,514 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/divbin2_unwindbound5.i[951,964] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 17:26:45,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:26:45,553 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:26:45,577 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/divbin2_unwindbound5.i[951,964] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2021-01-06 17:26:45,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:26:45,623 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:26:45,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:45 WrapperNode [2021-01-06 17:26:45,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:26:45,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:26:45,627 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:26:45,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:26:45,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:45" (1/1) ... [2021-01-06 17:26:45,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:45" (1/1) ... [2021-01-06 17:26:45,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:26:45,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:26:45,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:26:45,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:26:45,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:45" (1/1) ... [2021-01-06 17:26:45,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:45" (1/1) ... [2021-01-06 17:26:45,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:45" (1/1) ... [2021-01-06 17:26:45,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:45" (1/1) ... [2021-01-06 17:26:45,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:45" (1/1) ... [2021-01-06 17:26:45,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:45" (1/1) ... [2021-01-06 17:26:45,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:45" (1/1) ... [2021-01-06 17:26:45,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:26:45,735 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:26:45,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:26:45,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:26:45,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:26:45,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:26:45,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:26:45,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:26:45,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:26:46,093 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:26:46,093 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 17:26:46,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:26:46 BoogieIcfgContainer [2021-01-06 17:26:46,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:26:46,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:26:46,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:26:46,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:26:46,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:26:45" (1/3) ... [2021-01-06 17:26:46,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123f4817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:26:46, skipping insertion in model container [2021-01-06 17:26:46,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:26:45" (2/3) ... [2021-01-06 17:26:46,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123f4817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:26:46, skipping insertion in model container [2021-01-06 17:26:46,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:26:46" (3/3) ... [2021-01-06 17:26:46,105 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound5.i [2021-01-06 17:26:46,113 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:26:46,118 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:26:46,145 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:26:46,180 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:26:46,180 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:26:46,181 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:26:46,181 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:26:46,181 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:26:46,182 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:26:46,182 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:26:46,182 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:26:46,251 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 17:26:46,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:26:46,274 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:46,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:46,278 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:46,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:46,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1819218388, now seen corresponding path program 1 times [2021-01-06 17:26:46,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:46,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690996369] [2021-01-06 17:26:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:46,497 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 17:26:46,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690996369] [2021-01-06 17:26:46,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:26:46,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:26:46,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449826466] [2021-01-06 17:26:46,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:26:46,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:46,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:26:46,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:26:46,526 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2021-01-06 17:26:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:46,547 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2021-01-06 17:26:46,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:26:46,548 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2021-01-06 17:26:46,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:46,559 INFO L225 Difference]: With dead ends: 35 [2021-01-06 17:26:46,560 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 17:26:46,563 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 17:26:46,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 17:26:46,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 17:26:46,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 17:26:46,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-01-06 17:26:46,608 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 7 [2021-01-06 17:26:46,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:46,608 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-01-06 17:26:46,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:26:46,609 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-01-06 17:26:46,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:26:46,609 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:46,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:46,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:26:46,610 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:46,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:46,612 INFO L82 PathProgramCache]: Analyzing trace with hash 177936045, now seen corresponding path program 1 times [2021-01-06 17:26:46,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:46,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140927450] [2021-01-06 17:26:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:46,630 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:46,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016277751] [2021-01-06 17:26:46,631 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 17:26:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:46,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 17:26:46,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:46,850 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 17:26:46,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140927450] [2021-01-06 17:26:46,851 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:46,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016277751] [2021-01-06 17:26:46,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:26:46,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:26:46,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897409011] [2021-01-06 17:26:46,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:26:46,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:46,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:26:46,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:26:46,856 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2021-01-06 17:26:46,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:46,884 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-01-06 17:26:46,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:26:46,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-01-06 17:26:46,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:46,886 INFO L225 Difference]: With dead ends: 29 [2021-01-06 17:26:46,886 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 17:26:46,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:26:46,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 17:26:46,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 17:26:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 17:26:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-01-06 17:26:46,893 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2021-01-06 17:26:46,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:46,893 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-01-06 17:26:46,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:26:46,894 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-01-06 17:26:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:26:46,895 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:46,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:47,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:26:47,110 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:47,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:47,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1269844846, now seen corresponding path program 1 times [2021-01-06 17:26:47,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:47,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815779998] [2021-01-06 17:26:47,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:47,135 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:47,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087534794] [2021-01-06 17:26:47,136 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 17:26:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:47,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:26:47,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:47,386 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 17:26:47,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815779998] [2021-01-06 17:26:47,388 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:47,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087534794] [2021-01-06 17:26:47,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:26:47,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:26:47,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677140292] [2021-01-06 17:26:47,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:26:47,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:47,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:26:47,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:26:47,396 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2021-01-06 17:26:47,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:47,534 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-01-06 17:26:47,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:26:47,535 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-01-06 17:26:47,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:47,537 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:26:47,537 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 17:26:47,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:26:47,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 17:26:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-01-06 17:26:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:26:47,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-01-06 17:26:47,554 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 9 [2021-01-06 17:26:47,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:47,555 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-01-06 17:26:47,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:26:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-01-06 17:26:47,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:26:47,556 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:47,556 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:47,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:47,771 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:47,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:47,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1820707731, now seen corresponding path program 1 times [2021-01-06 17:26:47,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:47,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783655421] [2021-01-06 17:26:47,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:47,796 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:47,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696719159] [2021-01-06 17:26:47,797 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 17:26:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:47,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:26:47,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:47,896 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 17:26:47,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783655421] [2021-01-06 17:26:47,897 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:47,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696719159] [2021-01-06 17:26:47,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:47,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 17:26:47,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624057178] [2021-01-06 17:26:47,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:26:47,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:47,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:26:47,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:26:47,900 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2021-01-06 17:26:47,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:47,930 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-01-06 17:26:47,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:26:47,930 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-06 17:26:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:47,931 INFO L225 Difference]: With dead ends: 36 [2021-01-06 17:26:47,931 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 17:26:47,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:26:47,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 17:26:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 17:26:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:26:47,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-01-06 17:26:47,937 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 11 [2021-01-06 17:26:47,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:47,938 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-01-06 17:26:47,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:26:47,938 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-01-06 17:26:47,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:26:47,939 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:47,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:48,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:48,153 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:48,155 INFO L82 PathProgramCache]: Analyzing trace with hash 656159560, now seen corresponding path program 1 times [2021-01-06 17:26:48,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:48,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571924032] [2021-01-06 17:26:48,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:48,172 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:48,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222682688] [2021-01-06 17:26:48,173 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 17:26:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:48,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:26:48,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:48,319 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 17:26:48,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571924032] [2021-01-06 17:26:48,320 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:48,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222682688] [2021-01-06 17:26:48,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:48,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 17:26:48,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864427073] [2021-01-06 17:26:48,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:26:48,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:48,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:26:48,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:26:48,322 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 5 states. [2021-01-06 17:26:48,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:48,446 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-01-06 17:26:48,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:26:48,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-06 17:26:48,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:48,448 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:26:48,448 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:26:48,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:26:48,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:26:48,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-01-06 17:26:48,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:26:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-01-06 17:26:48,455 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 12 [2021-01-06 17:26:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:48,455 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-01-06 17:26:48,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:26:48,455 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-01-06 17:26:48,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:26:48,456 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:48,456 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:48,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:48,672 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:48,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:48,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1439244613, now seen corresponding path program 1 times [2021-01-06 17:26:48,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:48,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181018045] [2021-01-06 17:26:48,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:48,692 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:48,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169390159] [2021-01-06 17:26:48,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:48,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:26:48,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:48,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181018045] [2021-01-06 17:26:48,762 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:48,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169390159] [2021-01-06 17:26:48,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:26:48,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:26:48,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567251293] [2021-01-06 17:26:48,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:26:48,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:48,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:26:48,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:26:48,765 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2021-01-06 17:26:48,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:48,798 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-01-06 17:26:48,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:26:48,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2021-01-06 17:26:48,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:48,800 INFO L225 Difference]: With dead ends: 41 [2021-01-06 17:26:48,800 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 17:26:48,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:26:48,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 17:26:48,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 17:26:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 17:26:48,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-01-06 17:26:48,805 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 14 [2021-01-06 17:26:48,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:48,806 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-01-06 17:26:48,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:26:48,806 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-01-06 17:26:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:26:48,807 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:48,807 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:49,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:26:49,021 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:49,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:49,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2003180887, now seen corresponding path program 1 times [2021-01-06 17:26:49,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:49,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981973278] [2021-01-06 17:26:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:49,041 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:49,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959901752] [2021-01-06 17:26:49,044 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 17:26:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:49,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 17:26:49,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:49,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981973278] [2021-01-06 17:26:49,292 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:49,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959901752] [2021-01-06 17:26:49,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:49,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:26:49,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262990068] [2021-01-06 17:26:49,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:26:49,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:49,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:26:49,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:26:49,294 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 9 states. [2021-01-06 17:26:49,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:49,469 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2021-01-06 17:26:49,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:26:49,470 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2021-01-06 17:26:49,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:49,471 INFO L225 Difference]: With dead ends: 58 [2021-01-06 17:26:49,471 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:26:49,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:26:49,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:26:49,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2021-01-06 17:26:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 17:26:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-01-06 17:26:49,477 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 17 [2021-01-06 17:26:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:49,477 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-01-06 17:26:49,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:26:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-01-06 17:26:49,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:26:49,478 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:49,478 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:49,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:49,687 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:49,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:49,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1222455332, now seen corresponding path program 1 times [2021-01-06 17:26:49,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:49,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580459085] [2021-01-06 17:26:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:49,723 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:49,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18981592] [2021-01-06 17:26:49,725 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 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 17:26:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:49,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:26:49,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:26:49,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580459085] [2021-01-06 17:26:49,812 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:49,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18981592] [2021-01-06 17:26:49,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:49,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 17:26:49,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146294206] [2021-01-06 17:26:49,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:26:49,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:49,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:26:49,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:26:49,815 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2021-01-06 17:26:49,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:49,848 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2021-01-06 17:26:49,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:26:49,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2021-01-06 17:26:49,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:49,849 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:26:49,849 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:26:49,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:26:49,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:26:49,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 17:26:49,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:26:49,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-01-06 17:26:49,855 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 19 [2021-01-06 17:26:49,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:49,855 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-01-06 17:26:49,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:26:49,856 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-01-06 17:26:49,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:26:49,857 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:49,857 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:50,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:50,072 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:50,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:50,074 INFO L82 PathProgramCache]: Analyzing trace with hash -881504125, now seen corresponding path program 2 times [2021-01-06 17:26:50,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:50,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601266321] [2021-01-06 17:26:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:50,089 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:50,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122461232] [2021-01-06 17:26:50,089 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 17:26:50,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:26:50,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:26:50,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 17:26:50,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:50,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601266321] [2021-01-06 17:26:50,466 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:50,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122461232] [2021-01-06 17:26:50,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:50,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:26:50,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104874444] [2021-01-06 17:26:50,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:26:50,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:50,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:26:50,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:26:50,468 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 10 states. [2021-01-06 17:26:50,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:50,716 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2021-01-06 17:26:50,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:26:50,716 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2021-01-06 17:26:50,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:50,718 INFO L225 Difference]: With dead ends: 70 [2021-01-06 17:26:50,718 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:26:50,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:26:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:26:50,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2021-01-06 17:26:50,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 17:26:50,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-01-06 17:26:50,724 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 20 [2021-01-06 17:26:50,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:50,725 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-01-06 17:26:50,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:26:50,725 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-01-06 17:26:50,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:26:50,726 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:50,726 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:50,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:26:50,937 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:50,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:50,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1117032318, now seen corresponding path program 2 times [2021-01-06 17:26:50,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:50,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774005310] [2021-01-06 17:26:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:50,967 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:50,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108348138] [2021-01-06 17:26:50,968 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 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 17:26:51,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:26:51,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:26:51,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:26:51,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:26:51,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774005310] [2021-01-06 17:26:51,087 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:51,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108348138] [2021-01-06 17:26:51,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:51,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:26:51,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967533922] [2021-01-06 17:26:51,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:26:51,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:51,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:26:51,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:26:51,089 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 7 states. [2021-01-06 17:26:51,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:51,146 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-01-06 17:26:51,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:26:51,147 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2021-01-06 17:26:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:51,147 INFO L225 Difference]: With dead ends: 63 [2021-01-06 17:26:51,147 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 17:26:51,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:26:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 17:26:51,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-01-06 17:26:51,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 17:26:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-01-06 17:26:51,154 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 22 [2021-01-06 17:26:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:51,154 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-01-06 17:26:51,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:26:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-01-06 17:26:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:26:51,155 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:51,155 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:51,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:51,363 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:51,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:51,364 INFO L82 PathProgramCache]: Analyzing trace with hash -755771670, now seen corresponding path program 1 times [2021-01-06 17:26:51,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:51,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859875938] [2021-01-06 17:26:51,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:51,376 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:51,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105606659] [2021-01-06 17:26:51,376 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 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 17:26:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:26:51,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 17:26:51,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:26:51,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859875938] [2021-01-06 17:26:51,594 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:51,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105606659] [2021-01-06 17:26:51,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:51,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:26:51,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359925171] [2021-01-06 17:26:51,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:26:51,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:51,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:26:51,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:26:51,597 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 6 states. [2021-01-06 17:26:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:26:51,681 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-01-06 17:26:51,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:26:51,682 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2021-01-06 17:26:51,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:26:51,683 INFO L225 Difference]: With dead ends: 61 [2021-01-06 17:26:51,683 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 17:26:51,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:26:51,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 17:26:51,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 17:26:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 17:26:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-01-06 17:26:51,689 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 22 [2021-01-06 17:26:51,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:26:51,690 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-01-06 17:26:51,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:26:51,690 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-01-06 17:26:51,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 17:26:51,691 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:26:51,691 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:26:51,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:26:51,906 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:26:51,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:26:51,907 INFO L82 PathProgramCache]: Analyzing trace with hash 145349737, now seen corresponding path program 3 times [2021-01-06 17:26:51,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:26:51,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659234215] [2021-01-06 17:26:51,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:26:51,935 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:26:51,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799925496] [2021-01-06 17:26:51,935 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 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 17:26:52,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:26:52,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:26:52,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:26:52,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:26:52,554 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 36 [2021-01-06 17:26:52,884 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:53,225 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:54,294 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:55,565 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:57,196 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:59,303 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 17:26:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 17:26:59,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659234215] [2021-01-06 17:26:59,946 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:26:59,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799925496] [2021-01-06 17:26:59,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:26:59,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:26:59,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509122114] [2021-01-06 17:26:59,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:26:59,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:26:59,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:26:59,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:26:59,948 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2021-01-06 17:27:00,401 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-01-06 17:27:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:00,629 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-01-06 17:27:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:27:00,630 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2021-01-06 17:27:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:00,631 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:27:00,631 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:27:00,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:27:00,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:27:00,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2021-01-06 17:27:00,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 17:27:00,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-01-06 17:27:00,638 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 23 [2021-01-06 17:27:00,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:00,638 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-01-06 17:27:00,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:27:00,638 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-01-06 17:27:00,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:27:00,639 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:00,639 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:00,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:27:00,840 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:00,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:00,841 INFO L82 PathProgramCache]: Analyzing trace with hash 81115620, now seen corresponding path program 3 times [2021-01-06 17:27:00,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:00,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012533307] [2021-01-06 17:27:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:00,868 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:00,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349112645] [2021-01-06 17:27:00,868 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 17:27:00,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:27:00,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:27:00,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:27:00,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 17:27:00,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012533307] [2021-01-06 17:27:00,969 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:00,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349112645] [2021-01-06 17:27:00,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:00,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:27:00,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657998708] [2021-01-06 17:27:00,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:27:00,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:00,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:27:00,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:27:00,971 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 6 states. [2021-01-06 17:27:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:01,010 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-01-06 17:27:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:27:01,011 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2021-01-06 17:27:01,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:01,011 INFO L225 Difference]: With dead ends: 74 [2021-01-06 17:27:01,011 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:27:01,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:27:01,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:27:01,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-01-06 17:27:01,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 17:27:01,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-01-06 17:27:01,018 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 25 [2021-01-06 17:27:01,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:01,018 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-01-06 17:27:01,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:27:01,018 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-01-06 17:27:01,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:27:01,019 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:01,019 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:01,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 17:27:01,232 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:01,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:01,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1791688368, now seen corresponding path program 2 times [2021-01-06 17:27:01,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:01,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842055224] [2021-01-06 17:27:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:01,255 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:01,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946308509] [2021-01-06 17:27:01,258 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 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 17:27:01,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:27:01,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:27:01,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:27:01,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:01,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842055224] [2021-01-06 17:27:01,410 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:01,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946308509] [2021-01-06 17:27:01,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:01,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:27:01,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829960146] [2021-01-06 17:27:01,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:27:01,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:01,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:27:01,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:27:01,416 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 9 states. [2021-01-06 17:27:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:01,471 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-01-06 17:27:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:27:01,472 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2021-01-06 17:27:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:01,472 INFO L225 Difference]: With dead ends: 70 [2021-01-06 17:27:01,472 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 17:27:01,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:27:01,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 17:27:01,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 17:27:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:27:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-01-06 17:27:01,482 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2021-01-06 17:27:01,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:01,484 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-01-06 17:27:01,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:27:01,485 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-01-06 17:27:01,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 17:27:01,488 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:01,488 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:01,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:27:01,703 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:01,703 INFO L82 PathProgramCache]: Analyzing trace with hash 292197772, now seen corresponding path program 1 times [2021-01-06 17:27:01,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:01,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685367222] [2021-01-06 17:27:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:01,726 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:01,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945310125] [2021-01-06 17:27:01,729 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 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 17:27:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:01,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 17:27:01,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:02,344 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:27:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:02,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685367222] [2021-01-06 17:27:02,376 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:02,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945310125] [2021-01-06 17:27:02,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:02,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:27:02,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762917561] [2021-01-06 17:27:02,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:27:02,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:02,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:27:02,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:27:02,378 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 12 states. [2021-01-06 17:27:02,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:02,659 INFO L93 Difference]: Finished difference Result 33 states and 32 transitions. [2021-01-06 17:27:02,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:27:02,660 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2021-01-06 17:27:02,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:02,661 INFO L225 Difference]: With dead ends: 33 [2021-01-06 17:27:02,661 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 17:27:02,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:27:02,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 17:27:02,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 17:27:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 17:27:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 26 transitions. [2021-01-06 17:27:02,665 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 26 transitions. Word has length 26 [2021-01-06 17:27:02,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:02,665 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 26 transitions. [2021-01-06 17:27:02,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:27:02,665 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 26 transitions. [2021-01-06 17:27:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 17:27:02,665 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:27:02,666 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:27:02,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:27:02,867 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:27:02,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:27:02,868 INFO L82 PathProgramCache]: Analyzing trace with hash 234939470, now seen corresponding path program 1 times [2021-01-06 17:27:02,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:27:02,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413968557] [2021-01-06 17:27:02,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:27:02,878 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:27:02,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068525269] [2021-01-06 17:27:02,879 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 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 [2021-01-06 17:27:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:27:03,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 17:27:03,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:27:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:27:03,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413968557] [2021-01-06 17:27:03,521 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:27:03,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068525269] [2021-01-06 17:27:03,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:27:03,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:27:03,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272811771] [2021-01-06 17:27:03,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:27:03,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:27:03,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:27:03,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:27:03,523 INFO L87 Difference]: Start difference. First operand 27 states and 26 transitions. Second operand 12 states. [2021-01-06 17:27:03,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:27:03,758 INFO L93 Difference]: Finished difference Result 27 states and 26 transitions. [2021-01-06 17:27:03,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:27:03,758 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2021-01-06 17:27:03,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:27:03,759 INFO L225 Difference]: With dead ends: 27 [2021-01-06 17:27:03,759 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 17:27:03,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:27:03,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 17:27:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 17:27:03,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 17:27:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 17:27:03,760 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-01-06 17:27:03,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:27:03,761 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 17:27:03,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:27:03,761 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 17:27:03,761 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 17:27:03,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:27:03,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 17:27:04,343 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-01-06 17:27:04,808 WARN L197 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2021-01-06 17:27:04,813 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-01-06 17:27:04,813 INFO L189 CegarLoopUtils]: For program point L19(lines 19 22) no Hoare annotation was computed. [2021-01-06 17:27:04,813 INFO L185 CegarLoopUtils]: At program point L19-2(line 40) the Hoare annotation is: (let ((.cse14 (mod ULTIMATE.start_main_~r~0 4294967296)) (.cse13 (mod ULTIMATE.start_main_~b~0 4294967296))) (let ((.cse2 (< .cse14 .cse13)) (.cse3 (<= 1 .cse14)) (.cse4 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse5 (= ULTIMATE.start_main_~q~0 0)) (.cse6 (= ULTIMATE.start_main_~A~0 ULTIMATE.start_main_~r~0))) (let ((.cse1 (or (and .cse2 (<= 2 .cse14) .cse4 (= ULTIMATE.start_main_~b~0 4) .cse5 .cse6) (and (= ULTIMATE.start_main_~b~0 2) .cse2 .cse3 .cse4 .cse5 .cse6))) (.cse7 (<= 5 ~counter~0)) (.cse8 (* ULTIMATE.start_main_~B~0 4)) (.cse0 (= ULTIMATE.start_main_~B~0 1)) (.cse10 (= ULTIMATE.start_main_~q~0 1)) (.cse9 (= ULTIMATE.start_main_~B~0 ULTIMATE.start_main_~b~0)) (.cse11 (mod ULTIMATE.start_main_~A~0 4294967296))) (or (and .cse0 .cse1 (= (* ULTIMATE.start_main_~B~0 2) ULTIMATE.start_main_~b~0)) (and .cse0 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7) (and (<= 4 ~counter~0) (= ULTIMATE.start_main_~b~0 .cse8) .cse1) (and .cse0 .cse2 .cse4 .cse9 .cse5 .cse6) (let ((.cse12 (mod .cse8 4294967296))) (and .cse0 .cse10 (< .cse11 .cse12) .cse4 (<= .cse13 .cse11) (= ULTIMATE.start_main_~A~0 (+ ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~r~0)) (= ULTIMATE.start_main_~b~0 (div .cse12 2)) .cse7)) (and .cse0 .cse10 .cse4 (<= 1 .cse11) .cse9 (= ULTIMATE.start_main_~A~0 (+ ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~b~0)) (< .cse11 2)))))) [2021-01-06 17:27:04,813 INFO L189 CegarLoopUtils]: For program point L19-3(lines 19 22) no Hoare annotation was computed. [2021-01-06 17:27:04,813 INFO L192 CegarLoopUtils]: At program point L19-5(lines 18 24) the Hoare annotation is: true [2021-01-06 17:27:04,814 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 17:27:04,814 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 17:27:04,814 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 17:27:04,814 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-01-06 17:27:04,814 INFO L189 CegarLoopUtils]: For program point L20(lines 20 21) no Hoare annotation was computed. [2021-01-06 17:27:04,814 INFO L189 CegarLoopUtils]: For program point L20-1(lines 20 21) no Hoare annotation was computed. [2021-01-06 17:27:04,814 INFO L192 CegarLoopUtils]: At program point L49(lines 26 50) the Hoare annotation is: true [2021-01-06 17:27:04,814 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 17:27:04,814 INFO L189 CegarLoopUtils]: For program point L38(lines 38 47) no Hoare annotation was computed. [2021-01-06 17:27:04,814 INFO L189 CegarLoopUtils]: For program point L38-2(lines 38 47) no Hoare annotation was computed. [2021-01-06 17:27:04,814 INFO L189 CegarLoopUtils]: For program point L34-1(lines 34 37) no Hoare annotation was computed. [2021-01-06 17:27:04,814 INFO L185 CegarLoopUtils]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~B~0 1)) (.cse1 (mod ULTIMATE.start_main_~r~0 4294967296)) (.cse2 (= ULTIMATE.start_main_~q~0 0)) (.cse3 (= ULTIMATE.start_main_~A~0 ULTIMATE.start_main_~r~0))) (or (and .cse0 (<= 1 .cse1) (<= 3 ~counter~0) .cse2 .cse3) (and (<= 1 ~counter~0) (= ULTIMATE.start_main_~b~0 2) (<= ~counter~0 1) (<= (mod ULTIMATE.start_main_~B~0 4294967296) .cse1) .cse2 (= (* ULTIMATE.start_main_~B~0 2) ULTIMATE.start_main_~b~0) .cse3) (and .cse0 (<= ~counter~0 0) (= ULTIMATE.start_main_~B~0 ULTIMATE.start_main_~b~0) .cse2 .cse3 (<= 0 ~counter~0)) (and (= ULTIMATE.start_main_~b~0 (* ULTIMATE.start_main_~B~0 4)) (<= 2 .cse1) (= ULTIMATE.start_main_~b~0 4) .cse2 .cse3 (<= 2 ~counter~0)))) [2021-01-06 17:27:04,814 INFO L189 CegarLoopUtils]: For program point L43(lines 43 46) no Hoare annotation was computed. [2021-01-06 17:27:04,815 INFO L189 CegarLoopUtils]: For program point L43-2(lines 26 50) no Hoare annotation was computed. [2021-01-06 17:27:04,815 INFO L189 CegarLoopUtils]: For program point L35(line 35) no Hoare annotation was computed. [2021-01-06 17:27:04,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:27:04 BoogieIcfgContainer [2021-01-06 17:27:04,837 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:27:04,838 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:27:04,838 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:27:04,838 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:27:04,839 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:26:46" (3/4) ... [2021-01-06 17:27:04,842 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 17:27:04,854 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-01-06 17:27:04,855 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 17:27:04,855 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 17:27:04,855 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 17:27:04,912 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/divbin2_unwindbound5.i-witness.graphml [2021-01-06 17:27:04,912 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:27:04,913 INFO L168 Benchmark]: Toolchain (without parser) took 19701.78 ms. Allocated memory was 153.1 MB in the beginning and 396.4 MB in the end (delta: 243.3 MB). Free memory was 128.0 MB in the beginning and 176.1 MB in the end (delta: -48.1 MB). Peak memory consumption was 196.4 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:04,914 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 153.1 MB. Free memory is still 126.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:27:04,914 INFO L168 Benchmark]: CACSL2BoogieTranslator took 408.64 ms. Allocated memory is still 153.1 MB. Free memory was 127.8 MB in the beginning and 118.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:04,915 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.52 ms. Allocated memory is still 153.1 MB. Free memory was 117.8 MB in the beginning and 116.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:04,915 INFO L168 Benchmark]: Boogie Preprocessor took 56.44 ms. Allocated memory is still 153.1 MB. Free memory was 116.5 MB in the beginning and 115.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:04,916 INFO L168 Benchmark]: RCFGBuilder took 361.04 ms. Allocated memory is still 153.1 MB. Free memory was 115.2 MB in the beginning and 102.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:04,916 INFO L168 Benchmark]: TraceAbstraction took 18739.65 ms. Allocated memory was 153.1 MB in the beginning and 396.4 MB in the end (delta: 243.3 MB). Free memory was 101.8 MB in the beginning and 178.7 MB in the end (delta: -76.9 MB). Peak memory consumption was 167.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:04,917 INFO L168 Benchmark]: Witness Printer took 74.51 ms. Allocated memory is still 396.4 MB. Free memory was 178.7 MB in the beginning and 176.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:27:04,920 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 153.1 MB. Free memory is still 126.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 408.64 ms. Allocated memory is still 153.1 MB. Free memory was 127.8 MB in the beginning and 118.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 50.52 ms. Allocated memory is still 153.1 MB. Free memory was 117.8 MB in the beginning and 116.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 56.44 ms. Allocated memory is still 153.1 MB. Free memory was 116.5 MB in the beginning and 115.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 361.04 ms. Allocated memory is still 153.1 MB. Free memory was 115.2 MB in the beginning and 102.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18739.65 ms. Allocated memory was 153.1 MB in the beginning and 396.4 MB in the end (delta: 243.3 MB). Free memory was 101.8 MB in the beginning and 178.7 MB in the end (delta: -76.9 MB). Peak memory consumption was 167.0 MB. Max. memory is 8.0 GB. * Witness Printer took 74.51 ms. Allocated memory is still 396.4 MB. Free memory was 178.7 MB in the beginning and 176.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((B == 1 && 1 <= r % 4294967296) && 3 <= counter) && q == 0) && A == r) || ((((((1 <= counter && b == 2) && counter <= 1) && B % 4294967296 <= r % 4294967296) && q == 0) && B * 2 == b) && A == r)) || (((((B == 1 && counter <= 0) && B == b) && q == 0) && A == r) && 0 <= counter)) || (((((b == B * 4 && 2 <= r % 4294967296) && b == 4) && q == 0) && A == r) && 2 <= counter) - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((B == 1 && ((((((r % 4294967296 < b % 4294967296 && 2 <= r % 4294967296) && 1 == cond) && b == 4) && q == 0) && A == r) || (((((b == 2 && r % 4294967296 < b % 4294967296) && 1 <= r % 4294967296) && 1 == cond) && q == 0) && A == r))) && B * 2 == b) || ((((((B == 1 && r % 4294967296 < b % 4294967296) && 1 <= r % 4294967296) && 1 == cond) && q == 0) && A == r) && 5 <= counter)) || ((4 <= counter && b == B * 4) && ((((((r % 4294967296 < b % 4294967296 && 2 <= r % 4294967296) && 1 == cond) && b == 4) && q == 0) && A == r) || (((((b == 2 && r % 4294967296 < b % 4294967296) && 1 <= r % 4294967296) && 1 == cond) && q == 0) && A == r)))) || (((((B == 1 && r % 4294967296 < b % 4294967296) && 1 == cond) && B == b) && q == 0) && A == r)) || (((((((B == 1 && q == 1) && A % 4294967296 < B * 4 % 4294967296) && 1 == cond) && b % 4294967296 <= A % 4294967296) && A == b + r) && b == B * 4 % 4294967296 / 2) && 5 <= counter)) || ((((((B == 1 && q == 1) && 1 == cond) && 1 <= A % 4294967296) && B == b) && A == r + b) && A % 4294967296 < 2) - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17.7s, OverallIterations: 16, TraceHistogramMax: 5, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 293 SDtfs, 177 SDslu, 783 SDs, 0 SdLazy, 714 SolverSat, 84 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 295 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 51 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 17 NumberOfFragments, 334 HoareAnnotationTreeSize, 4 FomulaSimplifications, 375 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 4 FomulaSimplificationsInter, 208 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 286 NumberOfCodeBlocks, 271 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 270 ConstructedInterpolants, 0 QuantifiedInterpolants, 60524 SizeOfPredicates, 64 NumberOfNonLiveVariables, 1256 ConjunctsInSsa, 266 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 80/174 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...