/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/egcd3-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:33:14,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:33:14,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:33:14,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:33:14,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:33:14,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:33:14,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:33:14,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:33:14,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:33:14,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:33:14,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:33:14,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:33:14,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:33:14,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:33:14,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:33:14,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:33:14,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:33:14,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:33:14,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:33:14,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:33:14,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:33:14,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:33:14,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:33:14,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:33:14,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:33:14,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:33:14,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:33:14,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:33:14,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:33:14,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:33:14,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:33:14,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:33:14,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:33:14,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:33:14,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:33:14,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:33:14,570 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 17:33:14,625 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:33:14,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:33:14,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:33:14,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:33:14,630 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:33:14,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:33:14,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:33:14,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:33:14,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:33:14,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:33:14,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:33:14,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:33:14,631 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:33:14,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:33:14,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:33:14,632 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:33:14,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:33:14,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:33:14,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:33:14,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:33:14,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:33:14,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:33:14,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:33:14,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:33:14,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:33:14,638 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:33:15,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:33:15,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:33:15,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:33:15,069 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:33:15,070 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:33:15,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2021-01-06 17:33:15,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8be90917e/9104dcda673f43a48f6073d3a3a65f15/FLAG71c1e42f0 [2021-01-06 17:33:15,757 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:33:15,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2021-01-06 17:33:15,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8be90917e/9104dcda673f43a48f6073d3a3a65f15/FLAG71c1e42f0 [2021-01-06 17:33:16,064 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8be90917e/9104dcda673f43a48f6073d3a3a65f15 [2021-01-06 17:33:16,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:33:16,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:33:16,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:33:16,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:33:16,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:33:16,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:33:16" (1/1) ... [2021-01-06 17:33:16,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b4ee9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:16, skipping insertion in model container [2021-01-06 17:33:16,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:33:16" (1/1) ... [2021-01-06 17:33:16,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:33:16,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:33:16,256 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/egcd3-ll_unwindbound10.c[490,503] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~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[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] 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[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2021-01-06 17:33:16,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:33:16,318 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:33:16,337 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/egcd3-ll_unwindbound10.c[490,503] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~p~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[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] 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[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] [2021-01-06 17:33:16,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:33:16,405 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:33:16,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:16 WrapperNode [2021-01-06 17:33:16,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:33:16,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:33:16,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:33:16,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:33:16,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:16" (1/1) ... [2021-01-06 17:33:16,436 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:16" (1/1) ... [2021-01-06 17:33:16,467 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:33:16,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:33:16,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:33:16,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:33:16,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:16" (1/1) ... [2021-01-06 17:33:16,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:16" (1/1) ... [2021-01-06 17:33:16,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:16" (1/1) ... [2021-01-06 17:33:16,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:16" (1/1) ... [2021-01-06 17:33:16,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:16" (1/1) ... [2021-01-06 17:33:16,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:16" (1/1) ... [2021-01-06 17:33:16,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:16" (1/1) ... [2021-01-06 17:33:16,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:33:16,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:33:16,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:33:16,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:33:16,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:16" (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 17:33:16,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:33:16,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:33:16,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:33:16,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:33:17,128 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:33:17,129 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-01-06 17:33:17,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:33:17 BoogieIcfgContainer [2021-01-06 17:33:17,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:33:17,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:33:17,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:33:17,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:33:17,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:33:16" (1/3) ... [2021-01-06 17:33:17,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf17bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:33:17, skipping insertion in model container [2021-01-06 17:33:17,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:33:16" (2/3) ... [2021-01-06 17:33:17,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf17bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:33:17, skipping insertion in model container [2021-01-06 17:33:17,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:33:17" (3/3) ... [2021-01-06 17:33:17,183 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound10.c [2021-01-06 17:33:17,197 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:33:17,202 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2021-01-06 17:33:17,222 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-01-06 17:33:17,275 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:33:17,275 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:33:17,275 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:33:17,275 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:33:17,276 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:33:17,276 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:33:17,276 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:33:17,276 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:33:17,297 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2021-01-06 17:33:17,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:33:17,303 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:17,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:17,304 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:17,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:17,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1233339761, now seen corresponding path program 1 times [2021-01-06 17:33:17,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:17,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569985457] [2021-01-06 17:33:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:17,492 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 17:33:17,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569985457] [2021-01-06 17:33:17,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:17,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:33:17,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855824659] [2021-01-06 17:33:17,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:33:17,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:17,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:33:17,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:33:17,520 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2021-01-06 17:33:17,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:17,549 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2021-01-06 17:33:17,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:33:17,553 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-01-06 17:33:17,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:17,564 INFO L225 Difference]: With dead ends: 77 [2021-01-06 17:33:17,564 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:33:17,568 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 17:33:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:33:17,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 17:33:17,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 17:33:17,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-01-06 17:33:17,610 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 10 [2021-01-06 17:33:17,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:17,611 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-01-06 17:33:17,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:33:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-01-06 17:33:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:33:17,612 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:17,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:17,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:33:17,613 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:17,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:17,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1507359540, now seen corresponding path program 1 times [2021-01-06 17:33:17,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:17,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709443964] [2021-01-06 17:33:17,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:17,643 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:17,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329174175] [2021-01-06 17:33:17,643 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 17:33:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:17,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 17:33:17,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:17,848 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 17:33:17,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709443964] [2021-01-06 17:33:17,849 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:17,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329174175] [2021-01-06 17:33:17,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:17,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:33:17,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262199009] [2021-01-06 17:33:17,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:33:17,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:17,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:33:17,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:33:17,854 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 4 states. [2021-01-06 17:33:17,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:17,888 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-01-06 17:33:17,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:33:17,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-01-06 17:33:17,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:17,891 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:33:17,891 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 17:33:17,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 17:33:17,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 17:33:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 17:33:17,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:33:17,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-01-06 17:33:17,899 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 11 [2021-01-06 17:33:17,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:17,899 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-01-06 17:33:17,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:33:17,900 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-01-06 17:33:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:33:17,900 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:17,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:18,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:33:18,117 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:18,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:18,119 INFO L82 PathProgramCache]: Analyzing trace with hash 515746917, now seen corresponding path program 1 times [2021-01-06 17:33:18,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:18,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001318985] [2021-01-06 17:33:18,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:18,138 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:18,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653056366] [2021-01-06 17:33:18,139 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 17:33:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:18,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:33:18,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:18,297 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 17:33:18,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001318985] [2021-01-06 17:33:18,298 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:18,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653056366] [2021-01-06 17:33:18,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:18,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:33:18,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206463033] [2021-01-06 17:33:18,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:33:18,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:18,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:33:18,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:18,301 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 5 states. [2021-01-06 17:33:18,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:18,490 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2021-01-06 17:33:18,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:33:18,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-06 17:33:18,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:18,493 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:33:18,493 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 17:33:18,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:33:18,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 17:33:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 39. [2021-01-06 17:33:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 17:33:18,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-01-06 17:33:18,503 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 12 [2021-01-06 17:33:18,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:18,503 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-01-06 17:33:18,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:33:18,504 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-01-06 17:33:18,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:33:18,504 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:18,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:18,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:18,719 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:18,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:18,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1270616931, now seen corresponding path program 1 times [2021-01-06 17:33:18,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:18,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811221340] [2021-01-06 17:33:18,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:18,743 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:18,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140124576] [2021-01-06 17:33:18,744 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 17:33:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:18,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:33:18,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:19,122 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 17:33:19,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811221340] [2021-01-06 17:33:19,123 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:19,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140124576] [2021-01-06 17:33:19,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:19,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 17:33:19,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218034297] [2021-01-06 17:33:19,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:33:19,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:19,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:33:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:19,126 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 8 states. [2021-01-06 17:33:19,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:19,580 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-01-06 17:33:19,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:33:19,581 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2021-01-06 17:33:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:19,583 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:33:19,583 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:33:19,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:33:19,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:33:19,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-01-06 17:33:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 17:33:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-01-06 17:33:19,603 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 16 [2021-01-06 17:33:19,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:19,603 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-01-06 17:33:19,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:33:19,604 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-01-06 17:33:19,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:33:19,605 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:19,605 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:19,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:19,822 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:19,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:19,824 INFO L82 PathProgramCache]: Analyzing trace with hash -648504839, now seen corresponding path program 1 times [2021-01-06 17:33:19,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:19,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088002176] [2021-01-06 17:33:19,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:19,844 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:19,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877286631] [2021-01-06 17:33:19,845 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 17:33:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:19,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:33:19,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:20,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088002176] [2021-01-06 17:33:20,011 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:20,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877286631] [2021-01-06 17:33:20,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:20,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 17:33:20,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393118086] [2021-01-06 17:33:20,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:33:20,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:20,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:33:20,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:20,013 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 5 states. [2021-01-06 17:33:20,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:20,054 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2021-01-06 17:33:20,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:33:20,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2021-01-06 17:33:20,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:20,057 INFO L225 Difference]: With dead ends: 85 [2021-01-06 17:33:20,058 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 17:33:20,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:20,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 17:33:20,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-01-06 17:33:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 17:33:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-01-06 17:33:20,068 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 17 [2021-01-06 17:33:20,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:20,068 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-01-06 17:33:20,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:33:20,068 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-01-06 17:33:20,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:33:20,069 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:20,069 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:20,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:20,283 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:20,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:20,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1354097033, now seen corresponding path program 1 times [2021-01-06 17:33:20,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:20,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675179933] [2021-01-06 17:33:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:20,303 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:20,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601322507] [2021-01-06 17:33:20,303 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 17:33:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:20,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:33:20,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:20,459 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 17:33:20,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675179933] [2021-01-06 17:33:20,460 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:20,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601322507] [2021-01-06 17:33:20,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:20,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 17:33:20,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357785520] [2021-01-06 17:33:20,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:33:20,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:20,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:33:20,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:33:20,462 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 6 states. [2021-01-06 17:33:20,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:20,518 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-01-06 17:33:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:33:20,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2021-01-06 17:33:20,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:20,519 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:33:20,520 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 17:33:20,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:33:20,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 17:33:20,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-01-06 17:33:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 17:33:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-01-06 17:33:20,535 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 18 [2021-01-06 17:33:20,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:20,535 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-01-06 17:33:20,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:33:20,535 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-01-06 17:33:20,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:33:20,538 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:20,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:20,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:33:20,754 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:20,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:20,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1292001664, now seen corresponding path program 1 times [2021-01-06 17:33:20,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:20,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515246957] [2021-01-06 17:33:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:20,771 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:20,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16376979] [2021-01-06 17:33:20,772 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 17:33:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:20,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:33:20,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:21,000 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 17:33:21,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515246957] [2021-01-06 17:33:21,000 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:21,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16376979] [2021-01-06 17:33:21,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:21,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 17:33:21,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697289767] [2021-01-06 17:33:21,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:33:21,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:21,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:33:21,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:21,002 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 8 states. [2021-01-06 17:33:21,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:21,386 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-01-06 17:33:21,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:33:21,387 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2021-01-06 17:33:21,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:21,388 INFO L225 Difference]: With dead ends: 66 [2021-01-06 17:33:21,388 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 17:33:21,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:33:21,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 17:33:21,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-01-06 17:33:21,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 17:33:21,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-01-06 17:33:21,396 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 18 [2021-01-06 17:33:21,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:21,396 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-01-06 17:33:21,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:33:21,396 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-01-06 17:33:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:33:21,397 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:21,397 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:21,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:21,614 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:21,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:21,616 INFO L82 PathProgramCache]: Analyzing trace with hash 971917338, now seen corresponding path program 1 times [2021-01-06 17:33:21,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:21,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422822478] [2021-01-06 17:33:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:21,631 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:21,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490400262] [2021-01-06 17:33:21,632 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 17:33:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:21,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:33:21,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:21,754 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 17:33:21,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422822478] [2021-01-06 17:33:21,755 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:21,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490400262] [2021-01-06 17:33:21,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:21,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:33:21,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378352593] [2021-01-06 17:33:21,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:33:21,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:21,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:33:21,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:33:21,757 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 7 states. [2021-01-06 17:33:21,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:21,981 INFO L93 Difference]: Finished difference Result 191 states and 227 transitions. [2021-01-06 17:33:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:33:21,981 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2021-01-06 17:33:21,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:21,983 INFO L225 Difference]: With dead ends: 191 [2021-01-06 17:33:21,983 INFO L226 Difference]: Without dead ends: 187 [2021-01-06 17:33:21,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:33:21,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-01-06 17:33:21,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 91. [2021-01-06 17:33:21,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 17:33:21,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2021-01-06 17:33:21,997 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 19 [2021-01-06 17:33:21,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:21,997 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2021-01-06 17:33:21,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:33:21,997 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2021-01-06 17:33:21,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:33:21,998 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:21,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:22,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:22,213 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:22,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:22,214 INFO L82 PathProgramCache]: Analyzing trace with hash -367893245, now seen corresponding path program 1 times [2021-01-06 17:33:22,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:22,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434209652] [2021-01-06 17:33:22,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:22,230 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:22,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306564768] [2021-01-06 17:33:22,231 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 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 17:33:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:22,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:33:22,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:22,375 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 17:33:22,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434209652] [2021-01-06 17:33:22,376 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:22,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306564768] [2021-01-06 17:33:22,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:22,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 17:33:22,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488641017] [2021-01-06 17:33:22,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:33:22,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:22,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:33:22,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:22,378 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand 8 states. [2021-01-06 17:33:22,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:22,591 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2021-01-06 17:33:22,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:33:22,591 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2021-01-06 17:33:22,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:22,592 INFO L225 Difference]: With dead ends: 111 [2021-01-06 17:33:22,592 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 17:33:22,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:33:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 17:33:22,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2021-01-06 17:33:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 17:33:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2021-01-06 17:33:22,605 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 20 [2021-01-06 17:33:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:22,605 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2021-01-06 17:33:22,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:33:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2021-01-06 17:33:22,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:33:22,606 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:22,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:22,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:33:22,820 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:22,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1357932506, now seen corresponding path program 1 times [2021-01-06 17:33:22,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:22,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134208077] [2021-01-06 17:33:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:22,846 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:22,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186557599] [2021-01-06 17:33:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:22,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:33:22,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:22,942 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 17:33:22,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134208077] [2021-01-06 17:33:22,942 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:22,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186557599] [2021-01-06 17:33:22,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:22,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:33:22,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916629526] [2021-01-06 17:33:22,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:33:22,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:22,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:33:22,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:22,944 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand 5 states. [2021-01-06 17:33:23,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:23,072 INFO L93 Difference]: Finished difference Result 226 states and 307 transitions. [2021-01-06 17:33:23,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:33:23,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2021-01-06 17:33:23,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:23,075 INFO L225 Difference]: With dead ends: 226 [2021-01-06 17:33:23,075 INFO L226 Difference]: Without dead ends: 224 [2021-01-06 17:33:23,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-01-06 17:33:23,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 137. [2021-01-06 17:33:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 17:33:23,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 179 transitions. [2021-01-06 17:33:23,094 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 179 transitions. Word has length 22 [2021-01-06 17:33:23,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:23,094 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 179 transitions. [2021-01-06 17:33:23,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:33:23,094 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 179 transitions. [2021-01-06 17:33:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 17:33:23,095 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:23,096 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:23,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:23,310 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:23,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:23,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1235592658, now seen corresponding path program 1 times [2021-01-06 17:33:23,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:23,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857077165] [2021-01-06 17:33:23,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:23,329 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:23,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875142340] [2021-01-06 17:33:23,329 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 17:33:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:23,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:33:23,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:23,480 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 17:33:23,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857077165] [2021-01-06 17:33:23,481 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:23,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875142340] [2021-01-06 17:33:23,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:23,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:33:23,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837827687] [2021-01-06 17:33:23,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:33:23,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:23,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:33:23,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:33:23,483 INFO L87 Difference]: Start difference. First operand 137 states and 179 transitions. Second operand 7 states. [2021-01-06 17:33:23,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:23,665 INFO L93 Difference]: Finished difference Result 210 states and 273 transitions. [2021-01-06 17:33:23,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:33:23,665 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2021-01-06 17:33:23,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:23,668 INFO L225 Difference]: With dead ends: 210 [2021-01-06 17:33:23,668 INFO L226 Difference]: Without dead ends: 208 [2021-01-06 17:33:23,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:33:23,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-01-06 17:33:23,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 191. [2021-01-06 17:33:23,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-01-06 17:33:23,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 257 transitions. [2021-01-06 17:33:23,699 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 257 transitions. Word has length 23 [2021-01-06 17:33:23,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:23,699 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 257 transitions. [2021-01-06 17:33:23,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:33:23,699 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 257 transitions. [2021-01-06 17:33:23,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 17:33:23,700 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:23,700 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:23,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:23,914 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:23,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:23,915 INFO L82 PathProgramCache]: Analyzing trace with hash -138249927, now seen corresponding path program 1 times [2021-01-06 17:33:23,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:23,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611869031] [2021-01-06 17:33:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:23,931 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:23,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293397747] [2021-01-06 17:33:23,932 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 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 17:33:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:23,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:33:23,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:24,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611869031] [2021-01-06 17:33:24,047 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:24,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293397747] [2021-01-06 17:33:24,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:24,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:33:24,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725203367] [2021-01-06 17:33:24,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:33:24,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:24,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:33:24,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:33:24,049 INFO L87 Difference]: Start difference. First operand 191 states and 257 transitions. Second operand 6 states. [2021-01-06 17:33:24,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:24,091 INFO L93 Difference]: Finished difference Result 280 states and 375 transitions. [2021-01-06 17:33:24,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:33:24,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2021-01-06 17:33:24,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:24,094 INFO L225 Difference]: With dead ends: 280 [2021-01-06 17:33:24,094 INFO L226 Difference]: Without dead ends: 191 [2021-01-06 17:33:24,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:33:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-01-06 17:33:24,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-01-06 17:33:24,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-01-06 17:33:24,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 256 transitions. [2021-01-06 17:33:24,115 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 256 transitions. Word has length 23 [2021-01-06 17:33:24,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:24,115 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 256 transitions. [2021-01-06 17:33:24,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:33:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 256 transitions. [2021-01-06 17:33:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 17:33:24,116 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:24,116 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:24,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:33:24,330 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:24,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:24,330 INFO L82 PathProgramCache]: Analyzing trace with hash -265418908, now seen corresponding path program 1 times [2021-01-06 17:33:24,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:24,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846878532] [2021-01-06 17:33:24,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:24,342 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:24,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219325850] [2021-01-06 17:33:24,343 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 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 17:33:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:24,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:33:24,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:24,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846878532] [2021-01-06 17:33:24,506 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:24,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219325850] [2021-01-06 17:33:24,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:24,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:33:24,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785807771] [2021-01-06 17:33:24,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:33:24,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:24,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:33:24,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:33:24,509 INFO L87 Difference]: Start difference. First operand 191 states and 256 transitions. Second operand 7 states. [2021-01-06 17:33:24,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:24,562 INFO L93 Difference]: Finished difference Result 303 states and 411 transitions. [2021-01-06 17:33:24,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:33:24,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2021-01-06 17:33:24,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:24,565 INFO L225 Difference]: With dead ends: 303 [2021-01-06 17:33:24,566 INFO L226 Difference]: Without dead ends: 196 [2021-01-06 17:33:24,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 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 17:33:24,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-01-06 17:33:24,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-01-06 17:33:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-01-06 17:33:24,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 260 transitions. [2021-01-06 17:33:24,593 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 260 transitions. Word has length 24 [2021-01-06 17:33:24,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:24,593 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 260 transitions. [2021-01-06 17:33:24,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:33:24,593 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 260 transitions. [2021-01-06 17:33:24,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:33:24,598 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:24,599 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:24,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 17:33:24,813 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:24,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1931632236, now seen corresponding path program 2 times [2021-01-06 17:33:24,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:24,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217899504] [2021-01-06 17:33:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:24,826 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:24,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313557777] [2021-01-06 17:33:24,827 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 17:33:24,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:33:24,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:33:24,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:33:24,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:25,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217899504] [2021-01-06 17:33:25,001 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:25,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313557777] [2021-01-06 17:33:25,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:25,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:33:25,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803421586] [2021-01-06 17:33:25,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:33:25,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:25,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:33:25,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:25,003 INFO L87 Difference]: Start difference. First operand 195 states and 260 transitions. Second operand 8 states. [2021-01-06 17:33:25,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:25,083 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2021-01-06 17:33:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:33:25,084 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2021-01-06 17:33:25,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:25,085 INFO L225 Difference]: With dead ends: 223 [2021-01-06 17:33:25,086 INFO L226 Difference]: Without dead ends: 219 [2021-01-06 17:33:25,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:33:25,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-01-06 17:33:25,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 202. [2021-01-06 17:33:25,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2021-01-06 17:33:25,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 268 transitions. [2021-01-06 17:33:25,110 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 268 transitions. Word has length 25 [2021-01-06 17:33:25,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:25,111 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 268 transitions. [2021-01-06 17:33:25,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:33:25,111 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 268 transitions. [2021-01-06 17:33:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:33:25,111 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:25,112 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:25,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:33:25,325 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:25,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:25,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1993727605, now seen corresponding path program 1 times [2021-01-06 17:33:25,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:25,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816478187] [2021-01-06 17:33:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:25,337 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:25,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576220962] [2021-01-06 17:33:25,337 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 17:33:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:25,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:33:25,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:25,528 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 17:33:25,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816478187] [2021-01-06 17:33:25,529 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:25,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576220962] [2021-01-06 17:33:25,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:25,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:33:25,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115726878] [2021-01-06 17:33:25,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:33:25,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:25,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:33:25,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:25,531 INFO L87 Difference]: Start difference. First operand 202 states and 268 transitions. Second operand 8 states. [2021-01-06 17:33:25,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:25,786 INFO L93 Difference]: Finished difference Result 216 states and 276 transitions. [2021-01-06 17:33:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:33:25,787 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2021-01-06 17:33:25,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:25,788 INFO L225 Difference]: With dead ends: 216 [2021-01-06 17:33:25,789 INFO L226 Difference]: Without dead ends: 214 [2021-01-06 17:33:25,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:33:25,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-01-06 17:33:25,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 202. [2021-01-06 17:33:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2021-01-06 17:33:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 266 transitions. [2021-01-06 17:33:25,814 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 266 transitions. Word has length 25 [2021-01-06 17:33:25,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:25,814 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 266 transitions. [2021-01-06 17:33:25,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:33:25,814 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 266 transitions. [2021-01-06 17:33:25,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 17:33:25,815 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:25,815 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:26,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:26,030 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:26,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:26,031 INFO L82 PathProgramCache]: Analyzing trace with hash 416971704, now seen corresponding path program 1 times [2021-01-06 17:33:26,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:26,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13110334] [2021-01-06 17:33:26,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:26,043 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:26,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405871960] [2021-01-06 17:33:26,044 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 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 17:33:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:26,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:33:26,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:26,229 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 17:33:26,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13110334] [2021-01-06 17:33:26,230 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:26,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405871960] [2021-01-06 17:33:26,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:26,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:33:26,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971224930] [2021-01-06 17:33:26,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:33:26,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:26,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:33:26,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:33:26,232 INFO L87 Difference]: Start difference. First operand 202 states and 266 transitions. Second operand 9 states. [2021-01-06 17:33:26,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:26,563 INFO L93 Difference]: Finished difference Result 336 states and 421 transitions. [2021-01-06 17:33:26,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:33:26,563 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2021-01-06 17:33:26,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:26,565 INFO L225 Difference]: With dead ends: 336 [2021-01-06 17:33:26,566 INFO L226 Difference]: Without dead ends: 334 [2021-01-06 17:33:26,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:33:26,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-01-06 17:33:26,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 243. [2021-01-06 17:33:26,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2021-01-06 17:33:26,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 321 transitions. [2021-01-06 17:33:26,589 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 321 transitions. Word has length 27 [2021-01-06 17:33:26,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:26,590 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 321 transitions. [2021-01-06 17:33:26,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:33:26,590 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 321 transitions. [2021-01-06 17:33:26,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:33:26,591 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:26,591 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:26,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:33:26,807 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:26,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:26,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1345328893, now seen corresponding path program 2 times [2021-01-06 17:33:26,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:26,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472729785] [2021-01-06 17:33:26,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:26,820 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:26,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989158141] [2021-01-06 17:33:26,821 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:26,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:33:26,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:33:26,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:33:26,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:26,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472729785] [2021-01-06 17:33:26,926 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:26,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989158141] [2021-01-06 17:33:26,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:26,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:33:26,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633463155] [2021-01-06 17:33:26,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:33:26,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:26,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:33:26,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:26,928 INFO L87 Difference]: Start difference. First operand 243 states and 321 transitions. Second operand 5 states. [2021-01-06 17:33:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:27,047 INFO L93 Difference]: Finished difference Result 530 states and 713 transitions. [2021-01-06 17:33:27,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:33:27,049 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2021-01-06 17:33:27,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:27,051 INFO L225 Difference]: With dead ends: 530 [2021-01-06 17:33:27,052 INFO L226 Difference]: Without dead ends: 425 [2021-01-06 17:33:27,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 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 17:33:27,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-01-06 17:33:27,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 267. [2021-01-06 17:33:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2021-01-06 17:33:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 355 transitions. [2021-01-06 17:33:27,078 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 355 transitions. Word has length 30 [2021-01-06 17:33:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:27,078 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 355 transitions. [2021-01-06 17:33:27,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:33:27,078 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 355 transitions. [2021-01-06 17:33:27,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:33:27,079 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:27,079 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:27,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 17:33:27,293 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:27,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:27,294 INFO L82 PathProgramCache]: Analyzing trace with hash -28513692, now seen corresponding path program 1 times [2021-01-06 17:33:27,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:27,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581627387] [2021-01-06 17:33:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:27,304 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:27,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573488947] [2021-01-06 17:33:27,304 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:27,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:33:27,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:27,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581627387] [2021-01-06 17:33:27,455 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:27,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573488947] [2021-01-06 17:33:27,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:27,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:33:27,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166237515] [2021-01-06 17:33:27,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:33:27,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:27,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:33:27,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:27,459 INFO L87 Difference]: Start difference. First operand 267 states and 355 transitions. Second operand 8 states. [2021-01-06 17:33:27,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:27,539 INFO L93 Difference]: Finished difference Result 487 states and 657 transitions. [2021-01-06 17:33:27,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:33:27,539 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2021-01-06 17:33:27,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:27,541 INFO L225 Difference]: With dead ends: 487 [2021-01-06 17:33:27,541 INFO L226 Difference]: Without dead ends: 285 [2021-01-06 17:33:27,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:33:27,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-01-06 17:33:27,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 281. [2021-01-06 17:33:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2021-01-06 17:33:27,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 370 transitions. [2021-01-06 17:33:27,568 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 370 transitions. Word has length 30 [2021-01-06 17:33:27,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:27,568 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 370 transitions. [2021-01-06 17:33:27,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:33:27,568 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 370 transitions. [2021-01-06 17:33:27,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 17:33:27,569 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:27,569 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:27,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 17:33:27,784 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:27,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:27,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1302269029, now seen corresponding path program 1 times [2021-01-06 17:33:27,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:27,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957008890] [2021-01-06 17:33:27,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:27,796 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:27,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228808717] [2021-01-06 17:33:27,797 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:27,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:33:27,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:27,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957008890] [2021-01-06 17:33:27,997 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:27,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228808717] [2021-01-06 17:33:27,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:27,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:33:27,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738657128] [2021-01-06 17:33:27,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:33:27,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:27,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:33:27,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:33:27,999 INFO L87 Difference]: Start difference. First operand 281 states and 370 transitions. Second operand 9 states. [2021-01-06 17:33:28,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:28,405 INFO L93 Difference]: Finished difference Result 363 states and 478 transitions. [2021-01-06 17:33:28,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:33:28,406 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2021-01-06 17:33:28,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:28,408 INFO L225 Difference]: With dead ends: 363 [2021-01-06 17:33:28,408 INFO L226 Difference]: Without dead ends: 361 [2021-01-06 17:33:28,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:33:28,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-01-06 17:33:28,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 291. [2021-01-06 17:33:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2021-01-06 17:33:28,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 382 transitions. [2021-01-06 17:33:28,440 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 382 transitions. Word has length 32 [2021-01-06 17:33:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:28,440 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 382 transitions. [2021-01-06 17:33:28,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:33:28,441 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 382 transitions. [2021-01-06 17:33:28,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 17:33:28,441 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:28,441 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:28,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:28,655 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:28,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:28,656 INFO L82 PathProgramCache]: Analyzing trace with hash 885134474, now seen corresponding path program 1 times [2021-01-06 17:33:28,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:28,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508543112] [2021-01-06 17:33:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:28,679 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:28,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606291011] [2021-01-06 17:33:28,682 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:28,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 62 conjunts are in the unsatisfiable core [2021-01-06 17:33:28,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:29,154 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 17:33:29,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508543112] [2021-01-06 17:33:29,154 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:29,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606291011] [2021-01-06 17:33:29,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:29,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 17:33:29,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720051700] [2021-01-06 17:33:29,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:33:29,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:29,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:33:29,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:33:29,157 INFO L87 Difference]: Start difference. First operand 291 states and 382 transitions. Second operand 13 states. [2021-01-06 17:33:30,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:30,055 INFO L93 Difference]: Finished difference Result 472 states and 619 transitions. [2021-01-06 17:33:30,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:33:30,055 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2021-01-06 17:33:30,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:30,057 INFO L225 Difference]: With dead ends: 472 [2021-01-06 17:33:30,058 INFO L226 Difference]: Without dead ends: 355 [2021-01-06 17:33:30,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:33:30,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-01-06 17:33:30,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 316. [2021-01-06 17:33:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2021-01-06 17:33:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 415 transitions. [2021-01-06 17:33:30,090 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 415 transitions. Word has length 33 [2021-01-06 17:33:30,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:30,091 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 415 transitions. [2021-01-06 17:33:30,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:33:30,091 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 415 transitions. [2021-01-06 17:33:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 17:33:30,091 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:30,092 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:30,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:30,305 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:30,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:30,305 INFO L82 PathProgramCache]: Analyzing trace with hash 731699348, now seen corresponding path program 1 times [2021-01-06 17:33:30,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:30,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789689272] [2021-01-06 17:33:30,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:30,314 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:30,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319881011] [2021-01-06 17:33:30,315 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:30,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:33:30,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:30,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789689272] [2021-01-06 17:33:30,475 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:30,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319881011] [2021-01-06 17:33:30,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:30,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:33:30,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900741709] [2021-01-06 17:33:30,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:33:30,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:30,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:33:30,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:33:30,477 INFO L87 Difference]: Start difference. First operand 316 states and 415 transitions. Second operand 9 states. [2021-01-06 17:33:30,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:30,600 INFO L93 Difference]: Finished difference Result 491 states and 655 transitions. [2021-01-06 17:33:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:33:30,600 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2021-01-06 17:33:30,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:30,603 INFO L225 Difference]: With dead ends: 491 [2021-01-06 17:33:30,603 INFO L226 Difference]: Without dead ends: 342 [2021-01-06 17:33:30,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:33:30,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-01-06 17:33:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 331. [2021-01-06 17:33:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2021-01-06 17:33:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 432 transitions. [2021-01-06 17:33:30,637 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 432 transitions. Word has length 38 [2021-01-06 17:33:30,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:30,638 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 432 transitions. [2021-01-06 17:33:30,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:33:30,638 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 432 transitions. [2021-01-06 17:33:30,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 17:33:30,639 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:30,639 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:30,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 17:33:30,855 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:30,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1517440196, now seen corresponding path program 1 times [2021-01-06 17:33:30,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:30,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974758238] [2021-01-06 17:33:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:30,865 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:30,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228365033] [2021-01-06 17:33:30,866 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:30,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:33:30,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:31,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974758238] [2021-01-06 17:33:31,040 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:31,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228365033] [2021-01-06 17:33:31,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:31,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:33:31,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498551177] [2021-01-06 17:33:31,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:33:31,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:31,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:33:31,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:33:31,042 INFO L87 Difference]: Start difference. First operand 331 states and 432 transitions. Second operand 10 states. [2021-01-06 17:33:31,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:31,164 INFO L93 Difference]: Finished difference Result 402 states and 514 transitions. [2021-01-06 17:33:31,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:33:31,165 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2021-01-06 17:33:31,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:31,167 INFO L225 Difference]: With dead ends: 402 [2021-01-06 17:33:31,167 INFO L226 Difference]: Without dead ends: 398 [2021-01-06 17:33:31,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:33:31,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-01-06 17:33:31,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 339. [2021-01-06 17:33:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2021-01-06 17:33:31,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 442 transitions. [2021-01-06 17:33:31,204 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 442 transitions. Word has length 39 [2021-01-06 17:33:31,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:31,205 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 442 transitions. [2021-01-06 17:33:31,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:33:31,205 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 442 transitions. [2021-01-06 17:33:31,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 17:33:31,205 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:31,206 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:31,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 17:33:31,419 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:31,420 INFO L82 PathProgramCache]: Analyzing trace with hash -631528752, now seen corresponding path program 1 times [2021-01-06 17:33:31,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:31,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233334193] [2021-01-06 17:33:31,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:31,440 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:31,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497371779] [2021-01-06 17:33:31,440 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:31,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:33:31,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:31,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233334193] [2021-01-06 17:33:31,639 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:31,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497371779] [2021-01-06 17:33:31,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:31,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:33:31,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109240673] [2021-01-06 17:33:31,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:33:31,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:31,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:33:31,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:33:31,641 INFO L87 Difference]: Start difference. First operand 339 states and 442 transitions. Second operand 10 states. [2021-01-06 17:33:32,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:32,558 INFO L93 Difference]: Finished difference Result 716 states and 925 transitions. [2021-01-06 17:33:32,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 17:33:32,559 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2021-01-06 17:33:32,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:32,563 INFO L225 Difference]: With dead ends: 716 [2021-01-06 17:33:32,563 INFO L226 Difference]: Without dead ends: 714 [2021-01-06 17:33:32,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=1079, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 17:33:32,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-01-06 17:33:32,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 378. [2021-01-06 17:33:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2021-01-06 17:33:32,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 494 transitions. [2021-01-06 17:33:32,603 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 494 transitions. Word has length 39 [2021-01-06 17:33:32,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:32,603 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 494 transitions. [2021-01-06 17:33:32,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:33:32,603 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 494 transitions. [2021-01-06 17:33:32,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 17:33:32,604 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:32,604 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:32,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:32,819 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:32,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:32,820 INFO L82 PathProgramCache]: Analyzing trace with hash 203246581, now seen corresponding path program 2 times [2021-01-06 17:33:32,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:32,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612291951] [2021-01-06 17:33:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:32,829 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:32,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767800108] [2021-01-06 17:33:32,830 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:32,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:33:32,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:33:32,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:33:32,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:32,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612291951] [2021-01-06 17:33:32,970 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:32,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767800108] [2021-01-06 17:33:32,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:32,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:33:32,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856442268] [2021-01-06 17:33:32,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:33:32,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:32,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:33:32,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:33:32,972 INFO L87 Difference]: Start difference. First operand 378 states and 494 transitions. Second operand 8 states. [2021-01-06 17:33:33,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:33,508 INFO L93 Difference]: Finished difference Result 948 states and 1245 transitions. [2021-01-06 17:33:33,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:33:33,509 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2021-01-06 17:33:33,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:33,514 INFO L225 Difference]: With dead ends: 948 [2021-01-06 17:33:33,514 INFO L226 Difference]: Without dead ends: 944 [2021-01-06 17:33:33,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:33:33,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-01-06 17:33:33,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 452. [2021-01-06 17:33:33,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2021-01-06 17:33:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 597 transitions. [2021-01-06 17:33:33,565 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 597 transitions. Word has length 40 [2021-01-06 17:33:33,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:33,565 INFO L481 AbstractCegarLoop]: Abstraction has 452 states and 597 transitions. [2021-01-06 17:33:33,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:33:33,565 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 597 transitions. [2021-01-06 17:33:33,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 17:33:33,566 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:33,566 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:33,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 17:33:33,781 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:33,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:33,782 INFO L82 PathProgramCache]: Analyzing trace with hash 905429967, now seen corresponding path program 1 times [2021-01-06 17:33:33,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:33,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440688088] [2021-01-06 17:33:33,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:33,797 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:33,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527082621] [2021-01-06 17:33:33,797 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:33,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:33:33,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:33,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440688088] [2021-01-06 17:33:33,945 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:33,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527082621] [2021-01-06 17:33:33,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:33,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:33:33,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905799968] [2021-01-06 17:33:33,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:33:33,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:33,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:33:33,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:33:33,947 INFO L87 Difference]: Start difference. First operand 452 states and 597 transitions. Second operand 9 states. [2021-01-06 17:33:34,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:34,087 INFO L93 Difference]: Finished difference Result 766 states and 1030 transitions. [2021-01-06 17:33:34,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:33:34,088 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2021-01-06 17:33:34,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:34,091 INFO L225 Difference]: With dead ends: 766 [2021-01-06 17:33:34,091 INFO L226 Difference]: Without dead ends: 464 [2021-01-06 17:33:34,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:33:34,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-01-06 17:33:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 460. [2021-01-06 17:33:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2021-01-06 17:33:34,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 605 transitions. [2021-01-06 17:33:34,155 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 605 transitions. Word has length 40 [2021-01-06 17:33:34,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:34,156 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 605 transitions. [2021-01-06 17:33:34,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:33:34,156 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 605 transitions. [2021-01-06 17:33:34,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 17:33:34,157 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:34,157 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:34,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:34,372 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:34,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:34,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1573117064, now seen corresponding path program 1 times [2021-01-06 17:33:34,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:34,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131947136] [2021-01-06 17:33:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:34,383 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:34,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597453819] [2021-01-06 17:33:34,384 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:34,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 17:33:34,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:33:34,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131947136] [2021-01-06 17:33:34,516 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:34,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597453819] [2021-01-06 17:33:34,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:34,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:33:34,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663793411] [2021-01-06 17:33:34,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:33:34,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:34,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:33:34,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:34,519 INFO L87 Difference]: Start difference. First operand 460 states and 605 transitions. Second operand 5 states. [2021-01-06 17:33:34,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:34,633 INFO L93 Difference]: Finished difference Result 870 states and 1172 transitions. [2021-01-06 17:33:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:33:34,634 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2021-01-06 17:33:34,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:34,637 INFO L225 Difference]: With dead ends: 870 [2021-01-06 17:33:34,637 INFO L226 Difference]: Without dead ends: 545 [2021-01-06 17:33:34,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 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 17:33:34,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-01-06 17:33:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 483. [2021-01-06 17:33:34,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2021-01-06 17:33:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 635 transitions. [2021-01-06 17:33:34,689 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 635 transitions. Word has length 41 [2021-01-06 17:33:34,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:34,689 INFO L481 AbstractCegarLoop]: Abstraction has 483 states and 635 transitions. [2021-01-06 17:33:34,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:33:34,689 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 635 transitions. [2021-01-06 17:33:34,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 17:33:34,690 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:34,690 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:34,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 17:33:34,904 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:34,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:34,905 INFO L82 PathProgramCache]: Analyzing trace with hash -149759960, now seen corresponding path program 2 times [2021-01-06 17:33:34,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:34,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140047128] [2021-01-06 17:33:34,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:34,913 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:34,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060272350] [2021-01-06 17:33:34,914 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:34,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 17:33:34,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:33:34,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 17:33:34,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:33:35,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140047128] [2021-01-06 17:33:35,031 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:35,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060272350] [2021-01-06 17:33:35,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:33:35,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:33:35,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196627398] [2021-01-06 17:33:35,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:33:35,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:35,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:33:35,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:33:35,033 INFO L87 Difference]: Start difference. First operand 483 states and 635 transitions. Second operand 5 states. [2021-01-06 17:33:35,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:35,157 INFO L93 Difference]: Finished difference Result 560 states and 736 transitions. [2021-01-06 17:33:35,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:33:35,157 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2021-01-06 17:33:35,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:35,160 INFO L225 Difference]: With dead ends: 560 [2021-01-06 17:33:35,160 INFO L226 Difference]: Without dead ends: 558 [2021-01-06 17:33:35,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:33:35,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-01-06 17:33:35,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 539. [2021-01-06 17:33:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2021-01-06 17:33:35,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 711 transitions. [2021-01-06 17:33:35,232 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 711 transitions. Word has length 41 [2021-01-06 17:33:35,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:35,233 INFO L481 AbstractCegarLoop]: Abstraction has 539 states and 711 transitions. [2021-01-06 17:33:35,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:33:35,233 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 711 transitions. [2021-01-06 17:33:35,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:33:35,233 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:35,234 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:35,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 17:33:35,448 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:35,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:35,448 INFO L82 PathProgramCache]: Analyzing trace with hash -595443504, now seen corresponding path program 2 times [2021-01-06 17:33:35,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:35,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163943050] [2021-01-06 17:33:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:35,456 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:35,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923424667] [2021-01-06 17:33:35,456 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:35,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:33:35,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:33:35,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 17:33:35,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:35,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163943050] [2021-01-06 17:33:35,734 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:35,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923424667] [2021-01-06 17:33:35,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:35,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:33:35,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216730162] [2021-01-06 17:33:35,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:33:35,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:33:35,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:33:35,736 INFO L87 Difference]: Start difference. First operand 539 states and 711 transitions. Second operand 12 states. [2021-01-06 17:33:36,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:36,681 INFO L93 Difference]: Finished difference Result 677 states and 897 transitions. [2021-01-06 17:33:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:33:36,681 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2021-01-06 17:33:36,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:36,684 INFO L225 Difference]: With dead ends: 677 [2021-01-06 17:33:36,684 INFO L226 Difference]: Without dead ends: 675 [2021-01-06 17:33:36,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:33:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-01-06 17:33:36,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 549. [2021-01-06 17:33:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 549 states. [2021-01-06 17:33:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 723 transitions. [2021-01-06 17:33:36,745 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 723 transitions. Word has length 42 [2021-01-06 17:33:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:36,745 INFO L481 AbstractCegarLoop]: Abstraction has 549 states and 723 transitions. [2021-01-06 17:33:36,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:33:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 723 transitions. [2021-01-06 17:33:36,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 17:33:36,746 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:36,746 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:36,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 17:33:36,962 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:36,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:36,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1321889269, now seen corresponding path program 1 times [2021-01-06 17:33:36,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:36,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216903017] [2021-01-06 17:33:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:36,970 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:36,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99178876] [2021-01-06 17:33:36,971 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:37,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 80 conjunts are in the unsatisfiable core [2021-01-06 17:33:37,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:37,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216903017] [2021-01-06 17:33:37,610 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:37,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99178876] [2021-01-06 17:33:37,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:37,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 17:33:37,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051370403] [2021-01-06 17:33:37,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:33:37,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:37,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:33:37,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:33:37,611 INFO L87 Difference]: Start difference. First operand 549 states and 723 transitions. Second operand 16 states. [2021-01-06 17:33:38,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:38,716 INFO L93 Difference]: Finished difference Result 731 states and 954 transitions. [2021-01-06 17:33:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 17:33:38,717 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2021-01-06 17:33:38,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:38,720 INFO L225 Difference]: With dead ends: 731 [2021-01-06 17:33:38,720 INFO L226 Difference]: Without dead ends: 723 [2021-01-06 17:33:38,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:33:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-01-06 17:33:38,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 582. [2021-01-06 17:33:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2021-01-06 17:33:38,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 761 transitions. [2021-01-06 17:33:38,790 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 761 transitions. Word has length 43 [2021-01-06 17:33:38,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:38,791 INFO L481 AbstractCegarLoop]: Abstraction has 582 states and 761 transitions. [2021-01-06 17:33:38,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:33:38,791 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 761 transitions. [2021-01-06 17:33:38,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 17:33:38,792 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:38,792 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:39,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 17:33:39,005 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:39,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1565965267, now seen corresponding path program 1 times [2021-01-06 17:33:39,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:39,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888675600] [2021-01-06 17:33:39,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:39,022 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:39,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768637362] [2021-01-06 17:33:39,022 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:39,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 17:33:39,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:39,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888675600] [2021-01-06 17:33:39,500 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:39,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768637362] [2021-01-06 17:33:39,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:39,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 17:33:39,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003692616] [2021-01-06 17:33:39,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:33:39,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:39,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:33:39,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:33:39,502 INFO L87 Difference]: Start difference. First operand 582 states and 761 transitions. Second operand 15 states. [2021-01-06 17:33:42,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:42,567 INFO L93 Difference]: Finished difference Result 1269 states and 1647 transitions. [2021-01-06 17:33:42,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 17:33:42,568 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2021-01-06 17:33:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:42,574 INFO L225 Difference]: With dead ends: 1269 [2021-01-06 17:33:42,574 INFO L226 Difference]: Without dead ends: 1267 [2021-01-06 17:33:42,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=631, Invalid=2561, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 17:33:42,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-01-06 17:33:42,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 853. [2021-01-06 17:33:42,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 853 states. [2021-01-06 17:33:42,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1148 transitions. [2021-01-06 17:33:42,689 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1148 transitions. Word has length 44 [2021-01-06 17:33:42,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:42,689 INFO L481 AbstractCegarLoop]: Abstraction has 853 states and 1148 transitions. [2021-01-06 17:33:42,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:33:42,690 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1148 transitions. [2021-01-06 17:33:42,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 17:33:42,690 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:42,690 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:42,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:42,905 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:42,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:42,906 INFO L82 PathProgramCache]: Analyzing trace with hash -15075340, now seen corresponding path program 1 times [2021-01-06 17:33:42,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:42,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943632587] [2021-01-06 17:33:42,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:42,914 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:42,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256296373] [2021-01-06 17:33:42,915 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:42,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:33:42,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:43,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943632587] [2021-01-06 17:33:43,085 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:43,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256296373] [2021-01-06 17:33:43,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:43,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:33:43,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286401711] [2021-01-06 17:33:43,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:33:43,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:43,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:33:43,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:33:43,086 INFO L87 Difference]: Start difference. First operand 853 states and 1148 transitions. Second operand 10 states. [2021-01-06 17:33:43,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:43,280 INFO L93 Difference]: Finished difference Result 1558 states and 2131 transitions. [2021-01-06 17:33:43,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:33:43,280 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2021-01-06 17:33:43,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:43,284 INFO L225 Difference]: With dead ends: 1558 [2021-01-06 17:33:43,284 INFO L226 Difference]: Without dead ends: 879 [2021-01-06 17:33:43,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:33:43,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-01-06 17:33:43,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 871. [2021-01-06 17:33:43,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2021-01-06 17:33:43,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1168 transitions. [2021-01-06 17:33:43,390 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1168 transitions. Word has length 44 [2021-01-06 17:33:43,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:43,390 INFO L481 AbstractCegarLoop]: Abstraction has 871 states and 1168 transitions. [2021-01-06 17:33:43,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:33:43,391 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1168 transitions. [2021-01-06 17:33:43,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 17:33:43,391 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:43,391 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:43,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:43,604 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:43,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:43,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1214368663, now seen corresponding path program 2 times [2021-01-06 17:33:43,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:43,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177096912] [2021-01-06 17:33:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:43,614 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:43,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357140314] [2021-01-06 17:33:43,614 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:43,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:33:43,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:33:43,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 17:33:43,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:43,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177096912] [2021-01-06 17:33:43,811 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:43,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357140314] [2021-01-06 17:33:43,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:43,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:33:43,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763095019] [2021-01-06 17:33:43,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:33:43,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:43,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:33:43,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:33:43,813 INFO L87 Difference]: Start difference. First operand 871 states and 1168 transitions. Second operand 11 states. [2021-01-06 17:33:44,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:44,031 INFO L93 Difference]: Finished difference Result 1503 states and 2042 transitions. [2021-01-06 17:33:44,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:33:44,032 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2021-01-06 17:33:44,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:44,036 INFO L225 Difference]: With dead ends: 1503 [2021-01-06 17:33:44,036 INFO L226 Difference]: Without dead ends: 953 [2021-01-06 17:33:44,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:33:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-01-06 17:33:44,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 921. [2021-01-06 17:33:44,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 921 states. [2021-01-06 17:33:44,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1225 transitions. [2021-01-06 17:33:44,149 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1225 transitions. Word has length 45 [2021-01-06 17:33:44,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:44,149 INFO L481 AbstractCegarLoop]: Abstraction has 921 states and 1225 transitions. [2021-01-06 17:33:44,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:33:44,149 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1225 transitions. [2021-01-06 17:33:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 17:33:44,150 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:44,150 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:44,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:44,366 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:44,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:44,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1653911024, now seen corresponding path program 1 times [2021-01-06 17:33:44,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:44,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333426905] [2021-01-06 17:33:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:44,374 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:44,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831707617] [2021-01-06 17:33:44,374 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:44,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 86 conjunts are in the unsatisfiable core [2021-01-06 17:33:44,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:45,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333426905] [2021-01-06 17:33:45,271 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:45,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831707617] [2021-01-06 17:33:45,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:45,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-01-06 17:33:45,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713793619] [2021-01-06 17:33:45,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:33:45,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:45,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:33:45,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:33:45,273 INFO L87 Difference]: Start difference. First operand 921 states and 1225 transitions. Second operand 20 states. [2021-01-06 17:33:46,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:46,865 INFO L93 Difference]: Finished difference Result 1104 states and 1461 transitions. [2021-01-06 17:33:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 17:33:46,866 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2021-01-06 17:33:46,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:46,871 INFO L225 Difference]: With dead ends: 1104 [2021-01-06 17:33:46,871 INFO L226 Difference]: Without dead ends: 1102 [2021-01-06 17:33:46,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:33:46,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-01-06 17:33:46,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 970. [2021-01-06 17:33:46,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2021-01-06 17:33:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1290 transitions. [2021-01-06 17:33:46,985 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1290 transitions. Word has length 46 [2021-01-06 17:33:46,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:46,985 INFO L481 AbstractCegarLoop]: Abstraction has 970 states and 1290 transitions. [2021-01-06 17:33:46,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:33:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1290 transitions. [2021-01-06 17:33:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 17:33:46,986 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:46,986 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:47,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 17:33:47,200 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:47,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:47,201 INFO L82 PathProgramCache]: Analyzing trace with hash -927382991, now seen corresponding path program 1 times [2021-01-06 17:33:47,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:47,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711263559] [2021-01-06 17:33:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:47,208 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:47,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139208022] [2021-01-06 17:33:47,209 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:33:47,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 17:33:47,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:47,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711263559] [2021-01-06 17:33:47,402 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:47,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139208022] [2021-01-06 17:33:47,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:47,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:33:47,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783152152] [2021-01-06 17:33:47,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:33:47,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:47,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:33:47,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:33:47,403 INFO L87 Difference]: Start difference. First operand 970 states and 1290 transitions. Second operand 11 states. [2021-01-06 17:33:47,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:47,612 INFO L93 Difference]: Finished difference Result 1008 states and 1327 transitions. [2021-01-06 17:33:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:33:47,613 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2021-01-06 17:33:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:47,616 INFO L225 Difference]: With dead ends: 1008 [2021-01-06 17:33:47,616 INFO L226 Difference]: Without dead ends: 1004 [2021-01-06 17:33:47,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:33:47,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2021-01-06 17:33:47,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 988. [2021-01-06 17:33:47,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 988 states. [2021-01-06 17:33:47,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1310 transitions. [2021-01-06 17:33:47,725 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1310 transitions. Word has length 49 [2021-01-06 17:33:47,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:47,725 INFO L481 AbstractCegarLoop]: Abstraction has 988 states and 1310 transitions. [2021-01-06 17:33:47,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:33:47,725 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1310 transitions. [2021-01-06 17:33:47,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 17:33:47,726 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:47,726 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:47,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:47,934 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:47,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:47,934 INFO L82 PathProgramCache]: Analyzing trace with hash -41471547, now seen corresponding path program 2 times [2021-01-06 17:33:47,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:47,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538656158] [2021-01-06 17:33:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:47,942 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:47,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595812802] [2021-01-06 17:33:47,942 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:48,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:33:48,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:33:48,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 17:33:48,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:48,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538656158] [2021-01-06 17:33:48,262 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:48,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595812802] [2021-01-06 17:33:48,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:48,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 17:33:48,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383984056] [2021-01-06 17:33:48,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:33:48,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:48,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:33:48,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:33:48,263 INFO L87 Difference]: Start difference. First operand 988 states and 1310 transitions. Second operand 13 states. [2021-01-06 17:33:50,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:50,117 INFO L93 Difference]: Finished difference Result 1824 states and 2429 transitions. [2021-01-06 17:33:50,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 17:33:50,118 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2021-01-06 17:33:50,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:50,125 INFO L225 Difference]: With dead ends: 1824 [2021-01-06 17:33:50,126 INFO L226 Difference]: Without dead ends: 1822 [2021-01-06 17:33:50,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=374, Invalid=1518, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 17:33:50,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-01-06 17:33:50,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1038. [2021-01-06 17:33:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1038 states. [2021-01-06 17:33:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1380 transitions. [2021-01-06 17:33:50,264 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1380 transitions. Word has length 49 [2021-01-06 17:33:50,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:50,264 INFO L481 AbstractCegarLoop]: Abstraction has 1038 states and 1380 transitions. [2021-01-06 17:33:50,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:33:50,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1380 transitions. [2021-01-06 17:33:50,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 17:33:50,265 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:50,265 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:50,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 17:33:50,480 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:50,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:50,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1315150752, now seen corresponding path program 2 times [2021-01-06 17:33:50,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:50,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245955665] [2021-01-06 17:33:50,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:50,488 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:50,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747271022] [2021-01-06 17:33:50,488 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:50,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:33:50,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:33:50,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 100 conjunts are in the unsatisfiable core [2021-01-06 17:33:50,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:51,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245955665] [2021-01-06 17:33:51,675 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:51,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747271022] [2021-01-06 17:33:51,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:51,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-01-06 17:33:51,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539619537] [2021-01-06 17:33:51,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:33:51,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:51,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:33:51,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:33:51,677 INFO L87 Difference]: Start difference. First operand 1038 states and 1380 transitions. Second operand 21 states. [2021-01-06 17:33:52,453 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-01-06 17:33:53,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:53,645 INFO L93 Difference]: Finished difference Result 1401 states and 1863 transitions. [2021-01-06 17:33:53,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 17:33:53,645 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2021-01-06 17:33:53,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:53,650 INFO L225 Difference]: With dead ends: 1401 [2021-01-06 17:33:53,651 INFO L226 Difference]: Without dead ends: 1391 [2021-01-06 17:33:53,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=209, Invalid=1197, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 17:33:53,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-01-06 17:33:53,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1070. [2021-01-06 17:33:53,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2021-01-06 17:33:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1418 transitions. [2021-01-06 17:33:53,775 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1418 transitions. Word has length 50 [2021-01-06 17:33:53,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:53,776 INFO L481 AbstractCegarLoop]: Abstraction has 1070 states and 1418 transitions. [2021-01-06 17:33:53,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:33:53,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1418 transitions. [2021-01-06 17:33:53,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 17:33:53,777 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:53,777 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:53,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:53,994 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:53,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:53,994 INFO L82 PathProgramCache]: Analyzing trace with hash -223969367, now seen corresponding path program 2 times [2021-01-06 17:33:53,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:53,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642941478] [2021-01-06 17:33:53,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:54,001 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:54,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994477182] [2021-01-06 17:33:54,001 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:54,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:33:54,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:33:54,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:33:54,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:33:54,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642941478] [2021-01-06 17:33:54,213 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:54,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994477182] [2021-01-06 17:33:54,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:54,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:33:54,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41200210] [2021-01-06 17:33:54,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:33:54,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:54,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:33:54,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:33:54,214 INFO L87 Difference]: Start difference. First operand 1070 states and 1418 transitions. Second operand 12 states. [2021-01-06 17:33:54,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:33:54,476 INFO L93 Difference]: Finished difference Result 1935 states and 2605 transitions. [2021-01-06 17:33:54,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:33:54,477 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2021-01-06 17:33:54,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:33:54,482 INFO L225 Difference]: With dead ends: 1935 [2021-01-06 17:33:54,482 INFO L226 Difference]: Without dead ends: 1178 [2021-01-06 17:33:54,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:33:54,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-01-06 17:33:54,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1138. [2021-01-06 17:33:54,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1138 states. [2021-01-06 17:33:54,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1492 transitions. [2021-01-06 17:33:54,591 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1492 transitions. Word has length 51 [2021-01-06 17:33:54,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:33:54,591 INFO L481 AbstractCegarLoop]: Abstraction has 1138 states and 1492 transitions. [2021-01-06 17:33:54,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:33:54,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1492 transitions. [2021-01-06 17:33:54,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 17:33:54,592 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:33:54,592 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:33:54,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 17:33:54,798 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:33:54,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:33:54,798 INFO L82 PathProgramCache]: Analyzing trace with hash 780160965, now seen corresponding path program 3 times [2021-01-06 17:33:54,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:33:54,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057262267] [2021-01-06 17:33:54,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:33:54,806 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:33:54,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210869198] [2021-01-06 17:33:54,806 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:33:54,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:33:54,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:33:54,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:33:54,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:33:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 17:33:59,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057262267] [2021-01-06 17:33:59,775 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:33:59,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210869198] [2021-01-06 17:33:59,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:33:59,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 17:33:59,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080976935] [2021-01-06 17:33:59,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:33:59,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:33:59,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:33:59,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2021-01-06 17:33:59,776 INFO L87 Difference]: Start difference. First operand 1138 states and 1492 transitions. Second operand 9 states. [2021-01-06 17:35:24,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:35:24,329 INFO L93 Difference]: Finished difference Result 1197 states and 1571 transitions. [2021-01-06 17:35:24,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:35:24,330 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2021-01-06 17:35:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:35:24,334 INFO L225 Difference]: With dead ends: 1197 [2021-01-06 17:35:24,334 INFO L226 Difference]: Without dead ends: 1195 [2021-01-06 17:35:24,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=40, Invalid=85, Unknown=7, NotChecked=0, Total=132 [2021-01-06 17:35:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-01-06 17:35:24,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1098. [2021-01-06 17:35:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1098 states. [2021-01-06 17:35:24,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1441 transitions. [2021-01-06 17:35:24,448 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1441 transitions. Word has length 52 [2021-01-06 17:35:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:35:24,448 INFO L481 AbstractCegarLoop]: Abstraction has 1098 states and 1441 transitions. [2021-01-06 17:35:24,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:35:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1441 transitions. [2021-01-06 17:35:24,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 17:35:24,449 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:35:24,450 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:35:24,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 17:35:24,664 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:35:24,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:35:24,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1601103788, now seen corresponding path program 2 times [2021-01-06 17:35:24,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:35:24,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3001770] [2021-01-06 17:35:24,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:35:24,672 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:35:24,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500396327] [2021-01-06 17:35:24,673 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:35:24,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:35:24,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:35:24,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:35:24,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:35:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:35:24,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3001770] [2021-01-06 17:35:24,947 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:35:24,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500396327] [2021-01-06 17:35:24,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:35:24,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:35:24,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225899283] [2021-01-06 17:35:24,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:35:24,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:35:24,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:35:24,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:35:24,949 INFO L87 Difference]: Start difference. First operand 1098 states and 1441 transitions. Second operand 12 states. [2021-01-06 17:35:25,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:35:25,290 INFO L93 Difference]: Finished difference Result 1141 states and 1482 transitions. [2021-01-06 17:35:25,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:35:25,292 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2021-01-06 17:35:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:35:25,297 INFO L225 Difference]: With dead ends: 1141 [2021-01-06 17:35:25,297 INFO L226 Difference]: Without dead ends: 1137 [2021-01-06 17:35:25,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:35:25,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-01-06 17:35:25,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1102. [2021-01-06 17:35:25,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2021-01-06 17:35:25,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1445 transitions. [2021-01-06 17:35:25,464 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1445 transitions. Word has length 53 [2021-01-06 17:35:25,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:35:25,464 INFO L481 AbstractCegarLoop]: Abstraction has 1102 states and 1445 transitions. [2021-01-06 17:35:25,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:35:25,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1445 transitions. [2021-01-06 17:35:25,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 17:35:25,465 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:35:25,466 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:35:25,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 17:35:25,681 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:35:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:35:25,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1807952064, now seen corresponding path program 1 times [2021-01-06 17:35:25,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:35:25,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510382276] [2021-01-06 17:35:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:35:25,690 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:35:25,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987928997] [2021-01-06 17:35:25,690 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:35:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:35:25,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 17:35:25,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:35:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:35:25,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510382276] [2021-01-06 17:35:25,997 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:35:25,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987928997] [2021-01-06 17:35:25,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:35:25,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:35:25,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704613005] [2021-01-06 17:35:25,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:35:25,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:35:25,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:35:25,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:35:25,999 INFO L87 Difference]: Start difference. First operand 1102 states and 1445 transitions. Second operand 11 states. [2021-01-06 17:35:27,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:35:27,382 INFO L93 Difference]: Finished difference Result 1819 states and 2419 transitions. [2021-01-06 17:35:27,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 17:35:27,383 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2021-01-06 17:35:27,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:35:27,391 INFO L225 Difference]: With dead ends: 1819 [2021-01-06 17:35:27,391 INFO L226 Difference]: Without dead ends: 1817 [2021-01-06 17:35:27,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:35:27,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-01-06 17:35:27,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1371. [2021-01-06 17:35:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1371 states. [2021-01-06 17:35:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 1820 transitions. [2021-01-06 17:35:27,533 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 1820 transitions. Word has length 53 [2021-01-06 17:35:27,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:35:27,533 INFO L481 AbstractCegarLoop]: Abstraction has 1371 states and 1820 transitions. [2021-01-06 17:35:27,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:35:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 1820 transitions. [2021-01-06 17:35:27,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 17:35:27,534 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:35:27,534 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:35:27,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 17:35:27,740 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:35:27,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:35:27,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1015954848, now seen corresponding path program 3 times [2021-01-06 17:35:27,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:35:27,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243110199] [2021-01-06 17:35:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:35:27,748 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:35:27,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17950128] [2021-01-06 17:35:27,748 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:35:27,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:35:27,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:35:27,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 17:35:27,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:35:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 17:35:28,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243110199] [2021-01-06 17:35:28,299 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:35:28,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17950128] [2021-01-06 17:35:28,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:35:28,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:35:28,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526521272] [2021-01-06 17:35:28,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:35:28,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:35:28,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:35:28,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:35:28,301 INFO L87 Difference]: Start difference. First operand 1371 states and 1820 transitions. Second operand 12 states. [2021-01-06 17:35:33,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:35:33,481 INFO L93 Difference]: Finished difference Result 1683 states and 2228 transitions. [2021-01-06 17:35:33,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:35:33,482 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2021-01-06 17:35:33,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:35:33,490 INFO L225 Difference]: With dead ends: 1683 [2021-01-06 17:35:33,490 INFO L226 Difference]: Without dead ends: 1675 [2021-01-06 17:35:33,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:35:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-01-06 17:35:33,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1454. [2021-01-06 17:35:33,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1454 states. [2021-01-06 17:35:33,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 1919 transitions. [2021-01-06 17:35:33,666 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 1919 transitions. Word has length 53 [2021-01-06 17:35:33,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:35:33,667 INFO L481 AbstractCegarLoop]: Abstraction has 1454 states and 1919 transitions. [2021-01-06 17:35:33,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:35:33,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 1919 transitions. [2021-01-06 17:35:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 17:35:33,667 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:35:33,668 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:35:33,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:35:33,868 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:35:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:35:33,869 INFO L82 PathProgramCache]: Analyzing trace with hash -474089570, now seen corresponding path program 1 times [2021-01-06 17:35:33,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:35:33,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942703301] [2021-01-06 17:35:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:35:33,875 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:35:33,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534315567] [2021-01-06 17:35:33,876 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:35:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:35:33,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:35:33,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:35:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:35:34,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942703301] [2021-01-06 17:35:34,145 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:35:34,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534315567] [2021-01-06 17:35:34,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:35:34,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:35:34,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413623266] [2021-01-06 17:35:34,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:35:34,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:35:34,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:35:34,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:35:34,147 INFO L87 Difference]: Start difference. First operand 1454 states and 1919 transitions. Second operand 12 states. [2021-01-06 17:35:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:35:34,497 INFO L93 Difference]: Finished difference Result 2389 states and 3229 transitions. [2021-01-06 17:35:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:35:34,497 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2021-01-06 17:35:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:35:34,503 INFO L225 Difference]: With dead ends: 2389 [2021-01-06 17:35:34,504 INFO L226 Difference]: Without dead ends: 1497 [2021-01-06 17:35:34,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:35:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-01-06 17:35:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1491. [2021-01-06 17:35:34,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1491 states. [2021-01-06 17:35:34,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 1956 transitions. [2021-01-06 17:35:34,698 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 1956 transitions. Word has length 55 [2021-01-06 17:35:34,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:35:34,698 INFO L481 AbstractCegarLoop]: Abstraction has 1491 states and 1956 transitions. [2021-01-06 17:35:34,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:35:34,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 1956 transitions. [2021-01-06 17:35:34,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 17:35:34,700 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:35:34,700 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:35:34,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 17:35:34,907 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:35:34,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:35:34,908 INFO L82 PathProgramCache]: Analyzing trace with hash 766336805, now seen corresponding path program 4 times [2021-01-06 17:35:34,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:35:34,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970134463] [2021-01-06 17:35:34,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:35:34,914 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:35:34,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291212001] [2021-01-06 17:35:34,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:35:34,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:35:34,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:35:34,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 80 conjunts are in the unsatisfiable core [2021-01-06 17:35:34,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:35:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:35:36,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970134463] [2021-01-06 17:35:36,407 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:35:36,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291212001] [2021-01-06 17:35:36,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:35:36,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-01-06 17:35:36,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385940550] [2021-01-06 17:35:36,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:35:36,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:35:36,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:35:36,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:35:36,409 INFO L87 Difference]: Start difference. First operand 1491 states and 1956 transitions. Second operand 20 states. [2021-01-06 17:35:37,720 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-01-06 17:35:37,894 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-01-06 17:35:38,088 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-01-06 17:35:38,549 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-01-06 17:35:38,951 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-01-06 17:35:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:35:39,848 INFO L93 Difference]: Finished difference Result 2002 states and 2651 transitions. [2021-01-06 17:35:39,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 17:35:39,849 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2021-01-06 17:35:39,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:35:39,855 INFO L225 Difference]: With dead ends: 2002 [2021-01-06 17:35:39,855 INFO L226 Difference]: Without dead ends: 1642 [2021-01-06 17:35:39,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 17:35:39,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-01-06 17:35:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1469. [2021-01-06 17:35:40,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1469 states. [2021-01-06 17:35:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1930 transitions. [2021-01-06 17:35:40,003 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1930 transitions. Word has length 57 [2021-01-06 17:35:40,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:35:40,003 INFO L481 AbstractCegarLoop]: Abstraction has 1469 states and 1930 transitions. [2021-01-06 17:35:40,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:35:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1930 transitions. [2021-01-06 17:35:40,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 17:35:40,005 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:35:40,005 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:35:40,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:35:40,214 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:35:40,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:35:40,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1753699773, now seen corresponding path program 2 times [2021-01-06 17:35:40,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:35:40,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982543701] [2021-01-06 17:35:40,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:35:40,222 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:35:40,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662605454] [2021-01-06 17:35:40,222 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:35:40,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:35:40,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:35:40,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 17:35:40,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:35:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:35:40,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982543701] [2021-01-06 17:35:40,543 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:35:40,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662605454] [2021-01-06 17:35:40,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:35:40,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 17:35:40,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212606290] [2021-01-06 17:35:40,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 17:35:40,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:35:40,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 17:35:40,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:35:40,545 INFO L87 Difference]: Start difference. First operand 1469 states and 1930 transitions. Second operand 14 states. [2021-01-06 17:35:40,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:35:40,836 INFO L93 Difference]: Finished difference Result 2130 states and 2813 transitions. [2021-01-06 17:35:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:35:40,837 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2021-01-06 17:35:40,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:35:40,841 INFO L225 Difference]: With dead ends: 2130 [2021-01-06 17:35:40,841 INFO L226 Difference]: Without dead ends: 1031 [2021-01-06 17:35:40,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:35:40,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-01-06 17:35:40,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 597. [2021-01-06 17:35:40,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 597 states. [2021-01-06 17:35:40,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 691 transitions. [2021-01-06 17:35:40,929 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 691 transitions. Word has length 58 [2021-01-06 17:35:40,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:35:40,929 INFO L481 AbstractCegarLoop]: Abstraction has 597 states and 691 transitions. [2021-01-06 17:35:40,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:35:40,929 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 691 transitions. [2021-01-06 17:35:40,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 17:35:40,930 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:35:40,930 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:35:41,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:35:41,145 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:35:41,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:35:41,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2113709863, now seen corresponding path program 3 times [2021-01-06 17:35:41,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:35:41,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132017310] [2021-01-06 17:35:41,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:35:41,155 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:35:41,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94752069] [2021-01-06 17:35:41,155 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:35:41,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 17:35:41,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:35:41,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:35:41,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:35:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:35:41,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132017310] [2021-01-06 17:35:41,862 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:35:41,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94752069] [2021-01-06 17:35:41,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:35:41,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 17:35:41,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525772605] [2021-01-06 17:35:41,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:35:41,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:35:41,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:35:41,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:35:41,863 INFO L87 Difference]: Start difference. First operand 597 states and 691 transitions. Second operand 13 states. [2021-01-06 17:35:42,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:35:42,250 INFO L93 Difference]: Finished difference Result 734 states and 865 transitions. [2021-01-06 17:35:42,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 17:35:42,252 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2021-01-06 17:35:42,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:35:42,254 INFO L225 Difference]: With dead ends: 734 [2021-01-06 17:35:42,254 INFO L226 Difference]: Without dead ends: 646 [2021-01-06 17:35:42,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:35:42,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-01-06 17:35:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 604. [2021-01-06 17:35:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2021-01-06 17:35:42,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 699 transitions. [2021-01-06 17:35:42,370 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 699 transitions. Word has length 59 [2021-01-06 17:35:42,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:35:42,370 INFO L481 AbstractCegarLoop]: Abstraction has 604 states and 699 transitions. [2021-01-06 17:35:42,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:35:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 699 transitions. [2021-01-06 17:35:42,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 17:35:42,372 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:35:42,372 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:35:42,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 17:35:42,577 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:35:42,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:35:42,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1057467782, now seen corresponding path program 3 times [2021-01-06 17:35:42,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:35:42,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922129893] [2021-01-06 17:35:42,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:35:42,587 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:35:42,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512959536] [2021-01-06 17:35:42,587 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:35:42,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:35:42,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:35:42,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 17:35:42,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:35:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 17:35:45,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922129893] [2021-01-06 17:35:45,445 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:35:45,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512959536] [2021-01-06 17:35:45,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:35:45,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:35:45,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643993168] [2021-01-06 17:35:45,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:35:45,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:35:45,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:35:45,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=85, Unknown=1, NotChecked=0, Total=110 [2021-01-06 17:35:45,447 INFO L87 Difference]: Start difference. First operand 604 states and 699 transitions. Second operand 11 states. [2021-01-06 17:37:04,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:37:04,395 INFO L93 Difference]: Finished difference Result 873 states and 1026 transitions. [2021-01-06 17:37:04,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:37:04,396 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2021-01-06 17:37:04,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:37:04,398 INFO L225 Difference]: With dead ends: 873 [2021-01-06 17:37:04,398 INFO L226 Difference]: Without dead ends: 871 [2021-01-06 17:37:04,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=76, Invalid=298, Unknown=6, NotChecked=0, Total=380 [2021-01-06 17:37:04,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-01-06 17:37:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 585. [2021-01-06 17:37:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2021-01-06 17:37:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 675 transitions. [2021-01-06 17:37:04,489 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 675 transitions. Word has length 59 [2021-01-06 17:37:04,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:37:04,489 INFO L481 AbstractCegarLoop]: Abstraction has 585 states and 675 transitions. [2021-01-06 17:37:04,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:37:04,489 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 675 transitions. [2021-01-06 17:37:04,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 17:37:04,490 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:37:04,491 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:37:04,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 17:37:04,692 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:37:04,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:37:04,692 INFO L82 PathProgramCache]: Analyzing trace with hash 469187479, now seen corresponding path program 3 times [2021-01-06 17:37:04,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:37:04,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409987972] [2021-01-06 17:37:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:37:04,698 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:37:04,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794515146] [2021-01-06 17:37:04,699 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:37:04,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 17:37:04,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-01-06 17:37:04,812 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 17:37:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 17:37:04,853 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 17:37:05,001 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 17:37:05,001 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:37:05,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 17:37:05,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:37:05 BoogieIcfgContainer [2021-01-06 17:37:05,342 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:37:05,343 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:37:05,343 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:37:05,344 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:37:05,344 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:33:17" (3/4) ... [2021-01-06 17:37:05,347 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 17:37:05,450 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c-witness.graphml [2021-01-06 17:37:05,450 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:37:05,451 INFO L168 Benchmark]: Toolchain (without parser) took 229381.72 ms. Allocated memory was 154.1 MB in the beginning and 327.2 MB in the end (delta: 173.0 MB). Free memory was 129.0 MB in the beginning and 215.9 MB in the end (delta: -86.9 MB). Peak memory consumption was 86.8 MB. Max. memory is 8.0 GB. [2021-01-06 17:37:05,451 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 154.1 MB. Free memory is still 127.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:37:05,452 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.62 ms. Allocated memory is still 154.1 MB. Free memory was 128.7 MB in the beginning and 117.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:37:05,452 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.16 ms. Allocated memory is still 154.1 MB. Free memory was 117.8 MB in the beginning and 116.0 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:37:05,453 INFO L168 Benchmark]: Boogie Preprocessor took 35.31 ms. Allocated memory is still 154.1 MB. Free memory was 116.0 MB in the beginning and 114.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:37:05,458 INFO L168 Benchmark]: RCFGBuilder took 633.35 ms. Allocated memory is still 154.1 MB. Free memory was 114.8 MB in the beginning and 134.7 MB in the end (delta: -20.0 MB). Peak memory consumption was 20.2 MB. Max. memory is 8.0 GB. [2021-01-06 17:37:05,459 INFO L168 Benchmark]: TraceAbstraction took 228203.06 ms. Allocated memory was 154.1 MB in the beginning and 327.2 MB in the end (delta: 173.0 MB). Free memory was 134.1 MB in the beginning and 221.1 MB in the end (delta: -87.0 MB). Peak memory consumption was 85.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:37:05,459 INFO L168 Benchmark]: Witness Printer took 106.67 ms. Allocated memory is still 327.2 MB. Free memory was 221.1 MB in the beginning and 215.9 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2021-01-06 17:37:05,461 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 154.1 MB. Free memory is still 127.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 334.62 ms. Allocated memory is still 154.1 MB. Free memory was 128.7 MB in the beginning and 117.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 59.16 ms. Allocated memory is still 154.1 MB. Free memory was 117.8 MB in the beginning and 116.0 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.31 ms. Allocated memory is still 154.1 MB. Free memory was 116.0 MB in the beginning and 114.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 633.35 ms. Allocated memory is still 154.1 MB. Free memory was 114.8 MB in the beginning and 134.7 MB in the end (delta: -20.0 MB). Peak memory consumption was 20.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 228203.06 ms. Allocated memory was 154.1 MB in the beginning and 327.2 MB in the end (delta: 173.0 MB). Free memory was 134.1 MB in the beginning and 221.1 MB in the end (delta: -87.0 MB). Peak memory consumption was 85.5 MB. Max. memory is 8.0 GB. * Witness Printer took 106.67 ms. Allocated memory is still 327.2 MB. Free memory was 221.1 MB in the beginning and 215.9 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=1] [L41] EXPR counter++ VAL [counter=2] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [counter=2] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=3] [L41] EXPR counter++ VAL [counter=4] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [counter=4] [L48] EXPR counter++ VAL [counter=5] [L48] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L54] COND TRUE !(c >= 2 * v) VAL [counter=5] [L59] c = c - v [L60] k = k + d VAL [counter=5] [L41] EXPR counter++ VAL [counter=6] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [counter=6] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=6] [L34] EXPR counter++ VAL [counter=7] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=7] [L41] EXPR counter++ VAL [counter=8] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [counter=8] [L48] EXPR counter++ VAL [counter=9] [L48] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=9] [L11] COND FALSE !(!(cond)) VAL [counter=9] [L11] COND FALSE !(!(cond)) VAL [counter=9] [L11] COND FALSE !(!(cond)) VAL [counter=9] [L54] COND TRUE !(c >= 2 * v) VAL [counter=9] [L59] c = c - v [L60] k = k + d VAL [counter=9] [L41] EXPR counter++ VAL [counter=10] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [counter=10] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=10] [L34] EXPR counter++ VAL [counter=11] [L34] COND FALSE !(counter++<10) [L11] COND TRUE !(cond) VAL [counter=11] [L13] reach_error() VAL [counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 40 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 227.9s, OverallIterations: 47, TraceHistogramMax: 5, AutomataDifference: 192.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2291 SDtfs, 7629 SDslu, 10366 SDs, 0 SdLazy, 7782 SolverSat, 1245 SolverUnsat, 64 SolverUnknown, 0 SolverNotchecked, 139.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2002 GetRequests, 1285 SyntacticMatches, 6 SemanticMatches, 711 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3694 ImplicationChecksByTransitivity, 59.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1491occurred in iteration=42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.9s AutomataMinimizationTime, 46 MinimizatonAttempts, 5373 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 17.4s InterpolantComputationTime, 1735 NumberOfCodeBlocks, 1652 NumberOfCodeBlocksAsserted, 67 NumberOfCheckSat, 1629 ConstructedInterpolants, 0 QuantifiedInterpolants, 620227 SizeOfPredicates, 447 NumberOfNonLiveVariables, 7157 ConjunctsInSsa, 1162 ConjunctsInUnsatCore, 46 InterpolantComputations, 12 PerfectInterpolantSequences, 309/955 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 incorrect! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...